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I have reactivated the contact form in the top menu. Since I was receiving a flood of unwanted e-mail, the form was switched off for diagnosis. There was another cause so please use the form to contact me,

Almost a tradition but also in this issue of the MSB symposium series, I arranged the reviews and chaired the panel of reviewers to honor the best posters at the 37th International Symposium on Microscale Separations and Bioanalysis (eMSB2021) organized by Dr. Alexander Ivanov of Northeastern University together with associated co-chairs (see Registered participants can access all oral and poster presentations from this page.

The full set of slides that I prepared for the award ceremony, at last, is given below, and a list of the awardees.

graphical abstract
For quite some time, I had the idea to write a manuscript to explain the µPAC technology developed by Prof. Gert Desmet and commercialized by PharmaFluidics. I intended to describe the fundamental and practical barriers of obtaining ultimate separation performance of particle-packed columns (UHPLC) or of open tubular liquid chromatography (OTLC). It was aimed the manuscript to be a tutorial review, with emphasis on explaining the principle technology of pillar array-based separation column and demanding benchmark applications to demonstrate advantages of µPAC separations, especially for nanoflow HPLC.

The manuscript is now available in an open-access version via this link.

In case you do not have access but want a copy of the manuscript for personal usage, contact me via this form.


In late 2019 I was invited to submit a review on Capillary Iso-Electric Focusing for Wiley Series Encyclopedia of Analytical Chemistry. Since I am not so deeply involved in research in CIEF, and it was in the scope of the series, it was agreed that the manuscript could be tutorial-style, aimed to explain and help the readers to step into CIEF.


Capillary isoelectric focusing (CIEF) has proven to be a very versatile separation method for characterization, identification, purity determination, and quantitation of amphoteric substances such as peptides and proteins. CIEF has become an indispensable and invaluable analytical tool in proteomics research, in the development of new biotherapeutics, and in quality and process control of their manufacturing.
The method is based on arranging and separating proteins according to their isoelectric point (pI), allowing to determine changes in the charge state of proteins after structural modifications such as deamidation, oxidation, isomerization, N-terminus modification, disulfide formation, and glycosylation.
Modifications that change biochemical characteristics of biotherapeutics such as their isoelectric point (pI) reduce their safety and long-term stability, influence drug efficacy, and increase undesired immunogenicity.

Here is the connection to the manuscript in the series. You will need a Wiley account for the Encyclopedia to access the paper. In case you do not have access but need a copy of the manuscript for private usage please contact me via the form.


At the 37th issue of the Microscale Separations and Bioanalysis symposium, I had the privilege to present a tutorial lecture on Capillary Iso-Electric Focusing. 

Abstract. Since the inception of iso-electric focusing (IEF) as a high-resolution electrophoretic technique for the separation of amphoteric substances by Tiselius and Vestenberg, it has become a prime methodology for the separation of protein mixtures.

In conjunction with the receipt of the Pittcon Heritage Award 2021, I was invited by Agilent Technologies in Waldbronn, to give a comprehensive presentation of the scientific works and the entrepreneurial endeavors of Prof. Peter Hupe at the first Agilent InfinityLab LC virtual scientific conference, June 22 and 23. Details of this conference can be found at the following location Agilent Virtual Event.

As you may have learned otherwise, Prof. K-P. Hupe was honored with the Pittcon Heritage Award from the Science History Institute in Philadelphia. The award was presented at this year's virtual Pittsburgh Conference, Monday, March 8, 2021 The submission has been prepared in a joint effort of Fred Strohmeier and myself and with help from many others like Ron Majors and Dieter Hoehn.

The video registration of the award ceremony can be found here. The first speaker's recording is mono audio. Please use a headset with two loudspeakers.

At this year's virtual Pittsburgh Conference, I was invited to contribute to the Thirty-Second James L. Waters Symposium – Capillary Electrophoresis with an oral presentation on the development of High-Performance Capillary Electrophoresis instrumentation at Hewlett-Packard in the eighties and nineties of the last century. There were three more talks in this symposium by Norman Dovichi, Bob Weinberger, and Jeff Chapman. Program information is not available online anymore.

You can view the registration of the presentation here.


ITPlogoFrom September 1 to 4, the 36th International Symposium on Electroseparations and Liquid Phase Separation techniques took place at the University Paul Sabatier in Toulouse. Please check the website at for details on the scientific program and activities.

Like at other conferences, I was invited to arrange the review of posters for the Best Poster Award and the review of Oral Presentations by a Young Scientist (≤ 35 years) Award. You can find some more details at and in the award presentation that is posted at this location. (be aware that depending on your browser settings, the document goes directly to your download folder and does not open). The picture on the next page shows all the awardees together with the symposium chairmen, the president of the AfSep, and me, chairman of the review boards

Chromatography Today is a magazine very much like LC.GC, publishing manuscripts on new developments in the field of gas and liquid phase separations. Manuscripts may be logo chromatography todaycommunications on the application of GC and HPLC in actual hot fields in the market, about new developments in instrumentation for GC and HPLC, data evaluation software, columns, and consumables for analysis and sample preparation, and about hyphenation with mass spectrometry and other detection systems. The magazine also accepts more elaborate papers about progress in separation science and tutorial style manuscript explaining new techniques without too much depth to the readership of Chromatography Today. 

The editor of Chromatography Today has asked me to arrange a focus issue on CE and CE-MS. A number of my peers have contributed to the focus issue. The focus manuscripts will be part of the digital issue of Chromatography Today which you will find here soon (March issue).

My contribution to the issue deals with iCIEF. I have intended to provide a tutorial contribution painting the concept of iso-electrofocusing from flat gel plate to capillary formate and more recently to the instrumental implementation in imaged capillary isoelectric focusing. I hope the manuscript will interest you.

I have made it available from this website for registered visitors from here (be aware that depending on your browser settings, the document goes directly to your download folder and does not open). If you have registered on my website please click the button "registered visitors" and enter your credentials. If you have forgotten your credentials or want to register please use the button "contact me" also on the top of the page.


It is my pleasure to announce the publication by Agilent Technologies of a 100-page guidebook on CE/MS. It is intended as a resource for novices and practitioners of CE/MS and has a focus coverpage CE MS Guidebookon the Agilent CE/MS product and applications.

It is the intention of this guidebook to help novices to step into the practical application of CE/MS, and to provide current users with relevant information on method development and on diagnosis of practical problems. Towards this goal, the booklet is divided into two parts:

Part 1: Concepts of CE/MSDescription of the concept of CE/MS coupling with detailed emphasis to help understand the technique and to choose proper starting conditions. This part is my contribution.

Part 2: Practice of CE/MS Detailed description of the practice according to recommendations of Agilent that help to set up the CE instrument, the interface, the MS, and to provide current users with relevant information on method development and on the diagnosis of practical problems. Also, detailed guidelines to do system performance verification will be given. This second part is contributed by Agilent specialists mentioned on page 10 of the booklet. 

Leading experts in the field of CE/MS, Dr. Julie Schappler of Geneva University and Prof. Dr. Christian Neusüß have contributed with forewords.

The booklet is highly recommended especially for those who are considering applying CE/MS in their research. A click on the cover page will allow you to access the booklet from the Agilent website.


32nd International Symposium on Chromatography, September 23-27, 2018

At the above symposium I have participated as the chairman of the Best Poster Award Review board and have contributed with an oral presentation.

The award presentation slides are available here.

A PDF copy of my talk is available via following link. The animation on slide 8 works but needs to be started via the button. The animation op slide 13 doesnot work.


On June 20, I was invited to contribute to the doctorate seminar for students participating in the Analytics for Biologics project at Groningen University, the Netherlands. Please review this link for more information on this project. See also the detailed agenda of the two-weeks seminar via the link to the agenda on this page. 

Sixteen doctorate students from Europe participated in the whole seminar and were also present during my contribution on capillary electrophoresis. 

The preparation of the CE and CE-MS course was a larger effort that I have anticipated. I was very happy to receive good help from Agilent Technologies (my former employer) especially Dr. Martin Greiner and Dr. Jens Hühner, from Dr. Julie Schappler from Geneva University, Switzerland and from Prof. Christian Neusuess from Aalen University Germany who all provided highly relevant slides. In particular I was pleased to receive 10 printed copies of the Agilent Primer on CE which has become a tool for education at many schools, colleges and universities. I am grateful to all of them.

For the students (and others) to access a PDF copy of the whole course will be through the following link. In order to access the linked menu one has to login first. Please request your account via top menu “Contact me” and login via “Registered Visitors” after you have received the account name and password.

Alternatively I can send you a private cloud link

The 1st Joint CE- and FFE Forum was held October 5 and 6, in the Fraunhofer Institute of Chemical Technology, Pfinztal (close to Karlsruhe). I had the priviledge to be the co-organizer with Dominik Mueller who is a scientist in the ICT working in the electrochemistry group. The Forum takes place annually under global responsibility and with support of the Workgroup Separation Science of the Section Analytical Chemistry of the German Chemical Society (GDCh). 

About 30 scientist, graduate and post-doctoral students attended. In principle all participants contributed with an oral or poster contribution which has stimulated intensive discussions and exchange of experience. The organizers obtained valuable suggestions for stimulation and continuation of the forum.

For full details visit the forum website.


At the 31st International Symposium on Chromatography, I had the priviledge to arrange the reviews for the Genzo Shimadzu Best Poster Award. Together with an international board of senior peers participating in the Symposium the posters were reviewed by the following criteria:

  • Novelty and originality of the work, creativity and potential for innovation
  • Scope of work, technical quality of experimental design and execution of experiments
  • Readability of the presentation and author’s explanations (during the poster session!)

Approx. 350 posters have been submitted for presentation at ISC2016. About 150 authors have opted to participate in the best poster award competition. After  first round poster evaluation, by 16 reviewers working in pairs, 14 contributions were inivited for final round evaluation. This evaluation took place in a plenary session on Thursday, September 1 from 8:30 – 10:00 hrs, during which the nominated authors gave a flash presentation of her/his work in max. 3 to 4 slides. Fifteen reviewers in the room ranked the poster presentations and presenters which resulted in an overall rank.

It is my pleasure to announce a new monograph on CE-MS

CE-MS Book


Detection in Capillary Electrophoresis – an Introduction
Gerhardus de Jong 

Electrospray Ionization Interface Development for Capillary Electrophoresis-Mass Spectrometry
Jessica M. Risley, Caitlyn A.G. De Jong, David D.Y. ChenD

Sheath Liquids in CE-MS: Role, Parameters and Optimization
Christian W. Klampfl and Markus Himmelsbach

Recent Developments of Microchip Capillary Electrophoresis Coupled with Mass Spectrometry
Gerard Rozing

On-line Electrophoretic, Electrochromatographic, and Chromatographic Sample Concentration in CE-MS
Joselito P. Quirino

CE-MS in Drug analysis and Bioanalysis
Julie Schappler, Víctor González-Ruiz, Serge Rudaz

Intact Protein Analysis by Capillary Electrophoresis – Mass Spectrometry
Rob Haselberg and Govert W. Somsen