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Program and abstracts Chemometrics Symposium 2016 available
The program and abstracts of the Chemometrics Symposium 2016 in Ravenstein is available now. Please be aware that you receive a printed copy of this program booklet when you attend the symposium.
Abstracts Chemometrics Symposium 2016
The abstracts of the presentations that will be given on our Chemometrics Symposium 2016 can be found via this link:
Launch new DCS website
On September 9th 2016 the Dutch Chemometrics Society launched its new website. This up-to-date, smartphone aware website runs in Joomla and was designed in cooperation with Stip in Driebergen, The Netherlands.
Abstracts presentations Chemometrics Symposium 2016
Rudolf Kessler
“Perspectives in Process Analysis: Remarks on Robustness of Spectroscopic Methods for Industrial Applications".
Prof. Dr. Rudolf W. Kessler
Steinbeis Technology Transfer Centre Process Control and Data Analysis,
Kaiserstr. 66, 72764 Reutlingen, Germany
Reutlingen University, Process Analysis & Technology, PA&T,
contact:
Intelligent manufacturing has attracted enormous interest in recent years, not least because of the Process Analytical Technology/Quality by Design platform of the FDA and now also by the initiative Industrie 4.0. The future of industrial automation will be “arbitrarily modifiable and expandable (flexible), connect arbitrary components of multiple producers (networked), enabling its components to perform tasks related to its context independently (self-organizational) and emphasizes ease of use (user-oriented)”. Optical spectroscopy will play a major role in the sensor technology as it provides simultaneously chemical and morphological information [1].
The sensitivity of an analyte can be described by the quantum mechanical cross sections of the molecule which are the effective area that governs the probability of an event of e.g. elastic scattering, or absorption, or emission (e.g. fluorescence or Raman) of a photon at a specified wavelength. Another very important criterion for an analytical method is its capability to deliver signals that are free from interferences and give “true results” and is called selectivity resp. specificity. The responses are based on interactions usually evaluated in a mathematical domain by e.g. chemometrics, giving what has been called “computational selectivity”. Besides these key elements, many other aspects must also be taken into account to ensure robustness of the inline measurement [2].
The paper will discuss the advantages and disadvantages of the spectroscopic inline techniques. Examples demonstrate robust optical set ups in different industrial applications, e.g. biotechnology, pharmacy and manufacturing industry. It illustrates the opportunity to receive robust spectroscopic information with causal relations to the target value. It is important to emphasize, that inline quality control by spectroscopic techniques is a holistic approach. Process chemists, process engineers, chemometricians, and many other technologists must work together where multimodality will be a bedrock supporting the production of smart materials in smart factories.
[1] R. W. Kessler, Perspectives in Process Analysis. J. Chemometrics, 2013, 27: 369–378. doi: 10.1002/cem.2549
[2] R. W. Kessler, W. Kessler and E. Zikulnig-Rusch, A Critical Summary of Spectroscopic Techniques and their Robustness in Industrial PAT Applications, Chem. Ing. Tech. 2016, 88, No. 6, 710–721
Jan Gerretzen
“A novel and effective way for preprocessing selection based on Design of Experiments”.
Jan Gerretzen1,2,3, Ewa Szymańska1,2, Jacob Bart3, Tony Davies3, Henk-Jan van Manen3, Edwin van den Heuvel4, Jeroen Jansen1 and Lutgarde Buydens1
1Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
2TI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands
3AkzoNobel, Supply Chain, Research & Development, Zutphenseweg 10, 7418 AJ Deventer, The Netherlands
4Eindhoven University of Technology, Groene Loper 5, 5600 RM Eindhoven, The Netherlands
The aim of data preprocessing is to remove data artifacts—such as a baseline, scatter effects or noise—from the data and to enhance the analytically relevant information. Many preprocessing methods exist to do either or both, but it is not at all clear on beforehand which preprocessing methods should optimally be used. Appropriate preprocessing selection is a very important aspect in data analysis, since we have shown that multivariate model performance is often heavily influenced by preprocessing [1].
Current preprocessing selection approaches, however, are time consuming and/or based on arbitrary choices that do not necessarily improve the model [1]. It is thus highly desired to come up with a novel, generic preprocessing selection procedure that leads to a proper preprocessing within reasonable time. In this presentation, a novel and simple preprocessing selection approach will be presented, based on Design of Experiments (DoE) and Partial Least Squares (PLS) [2]. It will be shown that preprocessing selected using this approach improves both improves model performance and model interpretability. The latter will be illustrated using variable selection. The focus of the presentation will be on spectroscopic data.
This work is part of the ‘Analysis of Large data sets By Enhanced Robust Techniques’ project (ALBERT), funded by TI-COAST, which aims to develop generic strategies and methods to facilitate better and more robust chemometric and statistical analyses of complex analytical data.
Acknowledgement: This research received funding from the Netherlands Organization for Scientific Research (NWO) in the framework of Technology Area COAST.
References:
[1] J. Engel, et al. Trends in Anal. Chem., 50, 96 (2013)
[2] J. Gerretzen, et al., Anal. Chem., 87, 12096 (2015)
Andrei Barcaru
“Thinking Bayes: creating new ways of interpreting GCxGC(-MS) data”.
Nowadays, Bayesian statistics becomes increasingly popular in application fields as diverse as psychometrics, geophysics, sociology, medicine and (last but not least) analytical chemistry. The objectivity and robustness of Bayesian analysis made it an important tool in the WW II. Nowadays it has become the mathematical representation of how our brain works [1].
In the CHROMAMETRICS project, we used Bayesian statistics to create powerful and robust algorithms for data processing originated by chromatographic and mass spectrometry instrumentation. Some useful applications developed within the CHROMAMETRICS project based on Bayesian paradigm are going to be discussed in this communication. For example, Bayesian statistics has been applied to peak tracking in two-dimensional gas chromatography. Peak tracking refers to the matching of two peak tables. When a sample is analyzed in two different conditions (different inlet pressure and/or temperature program), the goal is to match the compounds from one chromatogram with those in the other. [2] The application of Bayesian analysis to this problem results in a paradigm shift compared to the way traditional peak matching algorithms work. Instead of a single (deterministic) answer, a collection of answers about possible peak matching results is achieved, with a probability assigned for each peak assignation. Another example is the comparison of two samples analyzed in GCxGC-MS, to find meaningful differences among them. In this case, the objective is to find compounds that are present in one sample but absent in the other. The application of Jensen-Shannon divergence within a Bayesian framework proved to give meaningful results, as well as robust against peak misalignments. [3]
In this communication, emphasis is given in the paradigm shift that using Bayesian analysis supposes, against traditional data analysis methods. Moreover, the methods developed in this project integrate different tools from different fields such as information technology and image analysis within the Bayesian framework.
[1] S. B. McGrayne, The Theory That Would Not Die: How Bayes’ Rule Cracked the Enigma Code, Hunted Down Russian Submarines, and Emerged Triumphant from Two Centuries of Controversy., Yale University Press, 2011.
[2] A. Barcaru, E. Derks and G. Vivó-Truyols, "Bayesian peak tracking: a novel probabilistic approach to match GCxGC chromatograms," Anal. Chim. Acta, 2016.
[3] A. Barcaru and G. Vivó-Truyols, "Use of Bayesian Statistics for Pairwise Comparison of Megavariate Data Sets: Extracting Meaningful Differences between GCxGC-MS Chromatograms Using Jensen–Shannon Divergence," Anal. Chem., no. 88 (4), p. 2096–2104, 2016.
Cyril Ruckebusch
“Chemometric analysis of chemical images ”.
Cyril Ruckebusch, Université de Lille, LASIR CNRS UMR 8516, F-59000 Lille, France
Chemical imaging aims to create a visual image of the different chemical compounds in a sample. This can be achieved by simultaneous measurement of spatial, spectral and/or temporal information. Image processing is required to obtain information regarding the mapping or distribution of these compounds in a biological or chemical image. In this talk, we will present our recent efforts to process hyperspectral images and super-resolution wide-field fluorescence nanoscopy data. We will show how the results obtained can be relevant to analyze other types of imaging modalities.
Olga Lushchikova
“Development of alarm system for water quality control based on flow cytometry data of algal populations”.
Olga Lushchikovaab, Gerjen Tinneveltab, Arnold Veenc, Jeroen Jansenb
aTI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands
bRadboud University, Institute for Molecules and Materials, (Analytical Chemistry), P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
cRijkswaterstaat, Zuiderwagenplein 2, 8224 AD Lelystad, The Nederlands
Rijkswaterstaat (RWS) applied flow cytometry for the on-line biomonitoring of algal cells in the river water to perform an accurate and fast water quality control. This biomonitoring is based on the measurement of optical properties of every single cell, that lead to a large amount of data. This is why, we developed a dedicated chemometric method, which is called DAMACY, to analyse the spectroscopic data. DAMACY is a multivariate method, which first describes the measured fingerprints of the algal communities. Secondly, this method predicts the normal environmental conditions such as the water temperature or day length. If the predicted natural factor shows large deviation, the sample can be examined more carefully to find the non-natural cause. Previously the results were obtained using offline methods, such as microscopy. Because of this procedure the monitoring could not be frequent whereupon the small water pollutions were hidden. This warning system will detect specific water pollution events early and robustly.
Ewoud van Velzen
"Robustness: A key parameter in the validation of multivariate sensory regression models”.
E.J.J. van Velzen1, S. Lam2, E. Saccenti2, A.K. Smilde2, E. Tareilus1, J.P.M. van Duynhoven1, D.M. Jacobs1
1Unilever Research, Microbiology & Analytical, Olivier van Noortlaan 120, Vlaardingen, The Netherlands
2Universiteit van Amsterdam, Biosystems Data Analysis, Science Park 904, Amsterdam, The Netherlands
International guidelines define robustness of an analytical procedure as a measure of its capacity to remain unaffected by small variations in experimental conditions [1]. Robustness is generally not considered in validation protocols even though it provides an important indicator of the fitness of an analytical procedure during normal use. Also in the validation of multivariate sensory regression models robustness is seldom included. Particularly in “Sensoromics” analysis, where multivariate relationships are assessed between descriptive (consumer) data and compositional (chemical) data, we state that a measure of robustness is a critical parameter for establishing model reliability and model suitability.
Figure 1. Actual versus predicted sensory scores obtained from a statistically significant PLS model (a-d). Increasing levels of artificial noise were added. As a result the statistical significance of the model dropped. This is demonstrated by the Q2-values in a permutation test (e-h). |
We demonstrated the importance of robustness testing in a sensory study in which the chemical compositions of natural food products was associated with the descriptive scores of a trained consumer panel. This multivariate association was modelled by means of PLS. The data was rather complex as (i) the predictor set was compiled of various analytical datasets with different error structures, and (ii) the predictor set contained missing data. Furthermore, the data was sparse given the enormous sample diversity in the training set. By integration of predefined noise simulations in the double cross-validation and the permutation testing [2], estimates of the relevant model statistics (e.g. Q2-values) could be obtained (Figure 1). The aim of this approach is that the susceptibility of the multivariate models against experimental errors can be tested. We found that robustness testing is of great additional value in the validation of multivariate prediction models. An important prerequisite, however, is that the error structures of the dependent and independent variables should be well known in advance.
References:
[1] Y. vander Heyden et al., J Pharm Biomed Anal., 5-6, 723-753 (2001).
[2] J.A. Westerhuis et al., Metabolomics, 4, 1, 81-89 (2008).
Venue
Fletcher Parkhotel Val Monte
Oude Holleweg 5
6572 AA - Berg en Dal / Nijmegen, the Netherlands
Tel: +31 (0)24 684 2000
E-mail:
Fletcher Parkhotel Val Monte is located in the area of Berg en Dal only 5 minutes from downtown Nijmegen.
Accessibility by public transport
Arriving at Schiphol airport:
Trains from Schiphol to Nijmegen (Sunday 10th September): 4 times per hour at :01, :16, :31 and :46 (19.60 euro 2nd class). Fletcher Parkhotel Val Monte can be reached from Nijmegen Central Station with a taxi (approximately 20 euro) or by bus. (bus 8 to Berg en Dal, ± 20 min), get off at stop "De Meerberg" and after that ± 200m walk. For information on trains see www.ns.nl/en, for busses and trains look at website www.9292.nl/en.
Arriving at Dusseldorf Weeze airport or Dusseldorf International airport:
By train, find your train connection at www.bahn.de.
Accessibility by car
From the North
Follow highway A50 to Arnhem, then A325 to Nijmegen. Enter Nijmegen and cross the bridge (Waalbrug). Follow the signs 'Berg en Dal'. In Berg en Dal turn left at the 3rd street (Oude Holleweg). You will see the sign Fletcher Parkhotel Val Monte.
From the South
Follow highway A73 to Nijmegen. Follow sign N326 Nijmegen. Follow the street Graafseweg till the roundabout Keizer Karelplein in the centre of Nijmegen. Leave the roundabout at the 2nd street, this is the "Oranjesingel". Follow the signs Berg en Dal and turn right at the 3rd street (Berg en Dalseweg). In Berg en Dal turn left at the 3rd street (Oude Holleweg). You will see the sign Fletcher Parkhotel Val Monte.
From the West
Follow Highway A12 or A15. Don't follow the signs Nijmegen at travel junction Valburg but follow Kleve/Bemmel. Turn right to A325 towards Nijmegen. Enter Nijmegen and cross the bridge (Waalbrug). Follow the signs 'Berg en Dal'. In Berg en Dal turn left at the 3rd street (Oude Holleweg). You will see the sign Fletcher Parkhotel Val Monte.
From the East
Follow N325 (Nieuwe Rijksweg) Kleve-Nijmegen and follow the signs Berg en Dal. Follow signs "Beek". In Beek follow the Rijksstraatweg and take the Oude Holleweg. Follow the signs Fletcher Parkhotel Val Monte.
Other direction
From Schiphol to Utrecht A9 and A2,Utrecht direction Arnhem A12,direction Nijmegen A50, A15 directionKleve-Bemmel, A325 direction Nijmegen.Direction Berg en Dal.
ICRM2017 Organizing and Scientific Committee
Organizing Committee
- Paul Eilers, Erasmus MC, Rotterdam (chair)
- Jeroen Jansen, Radboud University Nijmegen (co-chair)
- Gerben Mooiweer, JDEcoffee/R&D, Utrecht
- Bülent Üstün, Aspen BV, Oss
- Jos Hageman, Biometris, Wageningen University
- Agnieszka Smolinska, Maastricht University
- Jan Gerretzen, AkzoNobel Specialty Chemicals RD&I, Deventer
Scientific Committee
- Lutgarde Buydens, Analytical Chemistry, Institute for Molecules and Materials, Faculty of Sciences, Radboud University
- Age Smilde, Biosystems Data Analysis, Swammerdam Institute for Life Sciences, University of Amsterdam
- Paul Eilers, Department of Biostatistics, Erasmus University Medical Centre, Rotterdam
Archive: ACS 2013
28th Annual Chemometrics Symposium
November 7th, 2013
Jaarbeurs Conference Center, High Five beursvloer,
Jaarbeursplein, Utrecht
This year the 28th Annual Chemometrics Symposium of the Dutch Chemometrics Society on November 7th is part of the The Analytical Challenge conference on analytical chemistry and life sciences and the Labtechnology 2013 fair.
Program with short titles
9.00 Registration, coffee and plenary TAC lecture by Ad Bax.
11.00 Paul Eilers – Opening
11.15 Gianluca Baio –
“Come to the dark side: we got cookies! An introduction to Bayesian statistics”
12.15 Walking lunch / Poster session
13.15 Ron Wehrens – “Stability selection in metabolomics applications”
14.00 Jasper Engel – “Adapting MANOVA for analysis of -omics data”
14.30 Coffee/tea break
14.45 Johan de Rooi – “Sparse (blind) deconvolution with L0-penalties”
15.15 Marjan Sjerps – “Measuring evidential strength of chemical observations”
15.45 Winning Poster Announcement
Language
The official language of the symposium will be English.
Posters
Participants are invited to share their work during the poster session that will take place during the lunch break. A poster prize (100€) will be awarded to the best poster. If you want to submit a poster, send an e-mail before 24th October 2013 with title and abstract to
Venue
The meeting will take place at the Jaarbeurs Conference Center, High Five beursvloer,Jaarbeursplein, Utrecht.
Visiting address:
Jaarbeursplein
3521 AL Utrecht
Telephone: + 31 (0)30 295 5911
Jaarbeurs Conference Center Utrecht is located in the center of Utrecht and is therefore easily accessible using public transport. For train passengers, Utrecht Central Station is right next door. From Central Station, follow the signs ‘Jaarbeursplein’ for the five-minute walk to Jaarbeurs Conference Center Utrecht.
Registration
Registration is required. You register for The Analytical Challenge at web page http://www.theanalyticalchallenge.nl/inschrijven. Registration fee is 50 euro, students pay 15 euro.
Organizing Committee
Paul Eilers, Erasmus MC Rotterdam
Jeroen Jansen, Radboud University Nijmegen
Bülent Üstün, MSD Oss
Margriet Hendriks, University Leiden
Eduard Derks, DSM Geleen
Gerben Mooiweer, Douwe Egberts Utrecht
Archive: ACS 2015
29th Annual Chemometrics Symposium
“How to handle missing and censored data”
Thursday 15th October 2015, Wageningen, The Netherlands
Most recipes for data analysis assume that data are complete and have been measured accurately. In real life this often is not the case. Data can be missing, which means that they have not been measured at all. Or they may be censored, which means that they are known to be less (or sometimes larger) than a given threshold. Both cases need special treatment.
The Dutch Chemometrics Society invites you to their Annual Chemometrics Symposium 2015 that will focus on handling missing and censored data. We are proud to present a program with excellent speakers, who will discuss theory and practical applications.
Speakers with their presentation titles:
• Stef van Buuren
“Multiple imputation of incomplete multivariate data: a bird’s eye view”
• Hae-Won Uh
“Dealing with data below the detection limit: a statistical view on uncertainty”.
• Jeroen Elassaiss-Schaap
“Mixing censoring into population PK and PK-PD nonlinear mixed effects”
• Gerjen Tinnevelt
“A PLS-based approach to combine multiple flow cytometry tubes”.
• Martin Lopatka
“Novel data imputation to emulate complex mixing condition seen in fire debris samples”.
• Jos Hageman
“Batch correction for LCMS in the presence of non-detects”.
Location
The meeting will take place in meeting room C103, Forum, building number 102, Droevendaalsesteeg 2, 6708 PB Wageningen, The Netherlands. See Forum-building-number-102 for a description and how to get there.
Time
Registration and coffee between 9:15 and 9:55, opening symposium at 9:55.
Fee
The registration fee is 100 euros (50 for students and PhD students). Everything is included: participation in the meetings, lunch, refreshments and drinks at the end of the day. It is not possible to register for a half-day at a reduced price.
Language
The official language of the symposium will be English.
Posters
Participants are invited to share their work during the poster session that will take place during the lunch break. A poster prize (100€) will be awarded to the best poster. If you want to submit a poster, send an e-mail before 1st October with title and abstract to
How to register
Reply to this e-mail with your name, address and affiliation or send this information to the Dutch Chemometrics Society e-mail address
On behalf of the organizing committee we are looking forward to meet you in Wageningen,
Paul Eilers, Erasmus MC Rotterdam.
Gerben Mooiweer, JDEcoffee/R&D, Utrecht.
Bülent Üstün, Aspen Oss BV, Oss.
Jeroen Jansen, Radboud Universiteit Nijmegen, Nijmegen.
Jos Hageman, Wageningen University, Wageningen.
Theo Reijmers, Swammerdam Institute for Life Sciences, Amsterdam.
DCS Events
Archive 2017:
7th International Chemometrics Research Meeting
ICRM2017
September 10th - 14th 2017
Fletcher Parkhotel Val Monte
Berg en Dal, The Netherlands
The International Chemometrics Research Meeting is organized every three years (by the Dutch Chemometrics Society). It is dedicated to in-depth discussion of recent chemometric and statistical developments that are relevant to analytical chemistry and is applications. The format of the meeting is inspired by the Gordon conferences: two sessions per day (one in the morning and one in the evening), with an invited speaker, a discussant and lots of room for the floor discussion.
Participants can bring posters and there is room for a small number of contributed talks.
New this time are 4 short tutorials, on ASCA, PCA/PLS, penalties and on MCR. The tutorials take place in the afternoons. They do not overlap and attendance is free for conferences participants.
A social program and conference dinner is also part of ICRM2017.
The following invited speakers will give a keynote lecture:
- Peter Wentzell (Dalhousie University, Halifax, Canada).
- Lieven De Lathauwer (KU Leuven, Belgium).
- Peter Filzmoser (TU Wien, Austria)
- Morten Rasmussen (University of Copenhagen, Denmark)
- Marieke Timmerman (RU Groningen, The Netherlands)
- Onno de Noord (Shell Amsterdam, The Netherlands)
- TBA
This is a first announcement. More information about registration and the conference fee will follow soon.
Archive: ACS 2016
30th Annual Chemometrics Symposium
“Chemometrics in Action”
Thursday 13th October 2016, Ravenstein, The Netherlands
The Dutch Chemometrics Society cordially invites you to its Annual Chemometrics Symposium. This year the theme is “Chemometrics in Action” with a focus on practical applications. Six speakers will cover a variety of subjects. During the lunch a microNIR spectrophotometer will be demonstrated.
As usual, this symposium will be an excellent opportunity to meet old and new colleagues, to learn new things and to discuss them in an informal and friendly atmosphere.
Speakers with their presentation titles
• Rudolf Kessler
“Perspectives in Process Analysis: Remarks on Robustness of Spectroscopic Methods
for Industrial Applications
• Jan Gerretzen
“A novel and effective way for preprocessing selection based on Design of Experiments”.
• Andrei Barcaru
“Thinking Bayes: creating new ways of interpreting GCxGC(-MS) data”.
• Cyril Ruckebusch
“Chemometric analysis of chemical images”.
• Olga Lushchikova
“Development of alarm system for water quality control based on flow cytometry data
of algal populations”.
• Ewoud van Velzen
"Robustness: A key parameter in the validation of multivariate sensory regression
models”.
Abstracts of the presentations can be found here.
The booklet with the program of the symposium day can be viewed and downloaded too. Please be aware that you receive a printed copy of this program booklet when you attend the symposium. Please click on Program booklet ACS2016.pdf
Location
The meeting will take place in Vergader- en Conferentiecentrum Soeterbeeck, Elleboogstraat 2, 5371 LL Ravenstein See www.ru.nl/soeterbeeck/ for a description and how to get there.
Time
Registration and coffee between 9:15 and 10:00, opening symposium at 10:10.
Fee
The registration fee is 100 euros (50 for students and PhD students). Everything is included: participation in the meetings, lunch, refreshments and drinks at the end of the day. It is not possible to register for a half-day at a reduced price.
Language
The official language of the symposium will be English.
Posters
Participants are invited to share their work during the poster session that will take place during the lunch break. A poster prize (100€) will be awarded to the best poster. If you want to submit a poster, send an e-mail before 1st October with title and abstract to
Demo
During the lunch break a demonstration will be given of the microNIR.
How to register
Reply to this e-mail with your name, address and affiliation or send this information to the Dutch Chemometrics Society e-mail address
Flyer
Use this link to download the flyer of this symposium: Flyer_DCS_ACS2016.pdf
Sponsors
On behalf of the organizing committee we are looking forward meeting you in Ravenstein,
Paul Eilers, Erasmus MC Rotterdam.
Gerben Mooiweer, JDEcoffee/R&D, Utrecht.
Bülent Üstün, Aspen Oss BV, Oss.
Jeroen Jansen, Radboud University Nijmegen.
Jos Hageman, Biometris, Wageningen University.
Theo Reijmers, Kinesis Pharma, Breda.
About DCS
The history of the Dutch Chemometrics Society starts in 1972, with the merger of the discussion groups "Automation" and "Computerization" into the "Laboratory Optimization" group of the Royal Netherlands Chemical Society. This discussion group, which was driven by first generation chemometricians like A. Dijkstra, G. Kateman and H.C. Smit, was later re-named into the "Working Party on Chemometrics", which also functions as the Dutch Chapter of the International Chemometrics Society. Two important initiatives taken by this group were the organization of a series of short courses on chemometrics for industry and the start of a series of international conferences on chemometrics in analytical chemistry (CAC). CAC I (1978), II (1982) and IV (1988) were held in The Netherlands.
Present activities of the Dutch Chemometrics Society include an annual symposium on chemometrics, workshops on more focused topics, as well as contributions to activities of (other working parties of) the Royal Netherlands Chemical Society. The symposium follows a "classical" format, whereas the workshops present a forum for advanced, in depth discussion in a very informal setting. With the dissemination of chemometrics into industry and institutes the need for such workshops grew rapidly, since chemometricians rarely find discussion partners in their immediate working environment. In 1989 three such workshops, one on Multivariate Data Analysis (MVA workshop), one on Experimental Design and Optimization, and one on Quality Assurance started with a meeting frequency of three times per year. The latter two workshops dried out of new topics, but the Multivariate Data Analysis Workshop is still going strong. In 2005, a new discussion group was started with a focus on the analysis of proteomics and metabolomics data (Bio-MVA workshop).
The second generation chemometricians also started a new conference series: the International Chemometrics Research Meeting (ICRM), which was held in The Netherlands in 1994, 1998, 2002, 2006, 2011, 2014 and 2017. ICRM has a format which makes it complementary to other conference series in this field. Key elements are: extended exchange of ideas in an informal atmosphere, limited number of lectures on a few selected topics, scheduled plenary discussion sessions, plenty of time for informal discussion, and continuous poster display.
Participants to the Dutch Chemometrics Society activities come from universities (40%), industry (40%) and institutes (20%).