Coming back with some news
>> June 27, 2010
First, the 5th Edition of "Practical High-Performance Liquid Chromatography" (Wiley) From Veronika Meyer is out there.Best explanation of what chromatography is. IMHO.
>> April 3, 2010
Although not accepted today, the solvophobic theory can also be explained in the “shopping model”.I'm just talking about an overloaded situation, in which chromatography generates the famous Shark shaped peak.
Imagine that our “model” group of friends is interested in shopping for clothes, but they also see some shoes shops on the way, so the group goes from one clothes store to another, but when they cross the shoes store some people are delayed and the "pack" of people on corridor start to be more spread out.
Upgrades, Retrofits and Add-ins: Seeing Oxygen
>> March 15, 2010
When I was in College one of main complaints about graduate students was that they wasn't interested in self-employment or start their own bussiness. No one wanted to leave the bench and become a bussinessman.He works with something I never saw any company dealing. Replacement ceramic beads for NPD that with combination with certain instrumental conditions can expand the analyte selectivity or modify it.
Show your friends what you do
>> March 3, 2010
I got 2 serious questions on this video:
1- Did they retrofit that start button on top on this Shimadzu?
2- Is the analyst an actress or she really does this job in real life? I don't know about you, but here I don't see many cute chromatographers girls around.
Honouring the "Color Writer" name: Cyanotype prints
>> February 21, 2010
Konrad Grob - The Value of Education
>> February 6, 2010
by Dr. Konrad Grob, Kantonales Laboratory, Zurich
In my last Korner, I concluded that only an education and qualification system could prevent chromatography from further decline. Instead of devoting time and effort to force better chromatography through quality management schemes, validation, accreditation, and bureaucratic piles of paper, I suggested that institutions invest in improving the quality of their employees. In this way, both the employees and the employers share the responsibility for improvement. Employers should realize that knowing how to manage a crimper for closing autosampler vials (despite what some instrument vendors may claim) is not "all" it takes to make a gas chromatography (GC) laboratory successful. At the same time, if analysts want to be considered valuable assets, then they should be ready to take an examination that affirms their education and training. How much education is necessary? I received an overwhelming response to my article. Almost all of which confirmed my conclusion. For the sake of argument, though, I would have liked to hand over the microphone to somebody who disagrees. However, without refuting my point, I will take a moment to gain a perspective on the questions of 1) How simple is GC really? and 2) How much education is necessary? When observed from a safe distance, the work of a GC analyst appears simple. A gas chromatographer performing routine analyses should be able to help troubleshoot when results are not appropriate. The analyst should, in addition, be able to "rapidly" analyze x in sample y, and know how to select the right column, the injection technique, and all the many parameters finally determining whether the analysis will be successful. If capable of developing methods, the analyst needs to overview the possibilities and the problems to be expected; the clever choosing of strategies, tools, and conditions that may save trouble over years and reduce the time needed per sample by a factor of more than two.
No doubt analysts who are able to answer common GC questions achieve more reliable results because they can find the pitfalls. While other people waste several days because an analysis does not turn out adequately, these analysts find tests that can rapidly localize the problem. They know beforehand that aqueous samples are more difficult to analyze and should be injected in small volumes.
In industrial countries, every working day costs around $1,000. Eliminating three days of expense per month by improved troubleshooting saves $3,000 for that month. You easily can save several days per month by using better methods or improving performance of given methods. A knowledgeable gas chromatographer can prevent visits by the service engineer and avoid other delays disturbing production or delivery. If half of the profit generated by more competent work goes to shareholders, the analyst's salary should increase by $3,000 at least.
Photo by Robert Doisneau
Strange places to find a Chromatographer, Part: IV Software Company
>> February 1, 2010
Read more...If you are lucky, you are healthy and happy and life lasts a long time. If you are luckier, you embrace the rare opportunities for change that can better your life. The luckiest of us work very hard to make those changes become reality!
Thus, it seems very natural to find a chromatographer in a Software Company. Of course, it is year 2010 now, so one must look back to the early 1990’s to understand the “why.” The “why” is that as the world was changing from the “paper strip-chart recorder” world to the “computerized” world, it was only natural that a chromatographer who understood computers would “cross the line” from “analytical chemistry” to “software developer.”
So for a chromatographer to make the transition from “the lab” to “the keyboard,” there must be a “need.” It’s like the old saying, “Necessity is the Mother of Invention.” The need was there for computerized chromatography data stations, and there were chromatography software programs available in the early 1990’s, but the prices were out of reach for most of us in university research laboratories. Any chromatographer who has ever been forced to analyze a variety of different types of samples using only a pencil and ruler to measure “peak heights” knows this need.
We all have read stories about how chromatographers used to “cut and weigh” peaks on strip chart recorders prior to the computerization of chromatography, but in reality, it’s not really a viable option in “the real world.”
So the need was there, and the funds were not, so let’s push forward to fulfill the need!
Borland Pascal was generally the programming language of choice for scientists in the 1980’s and early 1990’s. Borland had made a commitment to educational institutions, and Pascal was the obvious language of choice for scientists, as Pascal was originally developed to be a teaching programming language, and did not have all the complexities and idiosyncrasies of Fortran and C. Alternatively, the Basic programming language was not even considered, due to its lack of forced structured functionality at the time.
So for a chromatographer to be able to “program” such a chromatography program, they must have been introduced to “computer programming.” That is why higher education is so important to all of us. By obtaining a Master’s Degree in Analytical Chemistry with an emphasis on Chemometrics, one must really learn the art of computer programming, as Chemometrics is by definition the interface between chemistry and mathematics. Even in the late 1980’s and early 1990’s, in order to extract useful information from both fields of study, computerization was essential. Thus, programming skills were essential to complete the requirements for this field of study.
For example, one Chemometrics technique learned was “Self Modeling Curve Resolution (SMCR).” SMCR is the name given to those algorithms that make only general assumptions about multivariate data in order to resolve the contribution of each chemical species to the total overlapped curve. The specific technique used was Evolving Factor Analysis (EFA), allows one to extract the “unique” spectra of unresolved spectral mixtures (within reason). Chemistry and Math, tied together by the new computer power at hand!
It’s simply impressive to see unresolved spectra of mixtures be resolved by this powerful technique!
But prior to obtaining a Master’s Degree in Analytical Chemistry, the original question remains, how does a chromatographer “really” get involved in learning a programming language? It’s really simple, just buy a used IBM computer with two floppy drives in the early 1980’s, set it up in front of one’s television at home, grab some popcorn and a cold beer, and learn how to use it. Eventually one can take a class at the local community college in Pascal, and realize halfway through the course that computer programming is a logical process, just like chromatography and science in general, and then get so bored with the class you eventually drop out! No problem, by then one is “hooked,” truly enjoys it, starts writing programs totally on their own, and there is no turning back!
Returning to the task at hand after graduate school, first and foremost, for a chromatography program, the raw chromatographic data must be accurately recorded. This requires one to understand the analog-to-digital conversion process. All the software is built around this process, as it is the most critical. Secondly, software functions must then be written to accurately calculate peak areas and heights, as these are also critical and fundamental to a chromatography program. Thirdly, the source code to calculate concentrations of the “unknown” samples must be written so that a final report can be generated.
These three phases are all critical, and each one relies on the proceeding one to yield the final answer the chromatographer is seeking!
So the realization that after graduating with a Master’s degree and subsequent employment in a specialized research role at the university, it becomes apparent that this specialized employment role can be safely played until retirement. But if one wishes to change for the better and make contributions in multiple future roles, and make any of these contributions worthwhile outside of their assigned role, then one must move forward.
Thus, while still employed full-time at the university, it became apparent the preliminary programming work toward creation of a basic chromatography software program could be completed at home after working a full eight hours at the university.
Basically, the thought process can be summed up with the old saying, “Behold the turtle, he only makes progress when he sticks his neck out.”
The question remains, how does one “practically” make the transition from a stable university position to the extremely challenging position of entrepreneur? There is no easy answer. I would guess that the most important attributes required are a willingness to work very hard (actually this won’t do it, one much actually be prepared to work very, very, very hard…the chance to be a true entrepreneur cannot even be considered unless one is ready to “give it all they have”), strive to be an optimist when everything is falling down around you, embrace the chance to change for the better, and through sheer determination, just make it work. When failure is not an option, the only path is to plan and push for success. It’s that simple.
So one moves forward after making the full commitment to be a true entrepreneur, with no safety net, according to the rules outlined above. It’s a thousand times more challenging than was planned. Sometimes one looks back, but there is really no time to dwell on the past, as good decisions have been made, and the only choice is to move forward.
Another old saying is “To be a good biologist, one must first be a good chemist.” The parallel is “To be a good Chromatography Software Developer, one must first be a good Chromatographer!” Of course, in today’s world it is essential to be surrounded by and assisted by Computer Scientists, Project Managers, Validation Engineers, and a Quality Assurance Program.
The chromatography software was translated from DOS Pascal to Delphi, Borland’s 16-bit Windows implementation of Pascal, in the mid-1990’s. It was later translated to C++ in the early 2000’s to take advantage of the 32-bit world and various software libraries that were available in C++ and not Pascal, although the current Borland Delphi Pascal compiler is still a wonderful product.
Eventually, we will write a database backend for our chromatography program, with Microsoft’s SQL Server being the database of choice, and of course we will also make an Oracle database backend. This will fulfill the requirements of very large laboratories with many simultaneous users.
However, “at the end of the day,” the software must work for the chromatographer! Thus, it still makes sense for the software developer to be “one and the same…”
Konrad Grob - Do We Need a Chromatography School?
>> January 24, 2010
Originally published on Restek website for Restek Advantage, 1998, Volume 3.
Reproduced with author’s authorization
by Dr. Konrad Grob, Kantonales Laboratory, Zurich
Sometimes things need to be said in a pointed way. The following is one of those things. If even less than 50% is applicable, then it is enough to sound an alarm.
The Slow Sinking of Chromatography
Strange places to find a chromatographer, Part III: Climbing the Everest
>> January 17, 2010
Richard Däppen, Hans Arm, Veronika R. MeyerApplications and limitations of commercially available chiral stationary phases for high-performance liquid chromatography. J. Chromatogr. 373 (1986) 1-20This paper got 114 citations until now.
Veronika R. MeyerHigh-performance liquid chromatographic theory for the practitionerThis was one of my first papers. In these years it was usual to send a postcard to the author if you were interested in a paper and wanted a reprint. I got over 600 of these cards! It was cited 33 times until now.
All photos from Swiss expedition team and guides.
Morgan Freeman and the Agilent 5890
>> January 16, 2010
Nothing to coment, just had this screenshot and want to share. Morgan Freeman on Batman Begins, in theory, he analyse the drug used by Scarecrow.
The almighty Flame ionization Detector
>> January 10, 2010
Second: This is why the FID have an equal response per carbon, I mean, same amount of carbon ALMOST same response on detector. Now I can sleep happy.







