SLIDE 6 www.theanalyticalscientist.com
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Feature
Fundamental shifts
Tings have certainly changed over the last 30 years. Something we observe frequently is how knowledge is decreasing, because the present generation are not being educated in the fundamentals as we were. And that is a great pity. It’s a consequence of the current situation; not enough people are trained in analytical science at universities and high schools. More and more people apply chromatography and mass spectrometry as techniques, but the number of systems that are sold to people who’ve never had an education in chromatography and spectroscopy is unbelievable. In fact, they are not at all interested in being highly specialized in chromatography – it’s purely application-oriented. In the past, we ran a full course program in-house that included the fundamentals of gas chromatography (GC), GC combined with mass spectrometry, interpretation of mass spectra, liquid chromatography, sample preparation, and so on. Te courses were mostly fully booked before 2000 but then the interest in fundamental courses decreased, while demand for on-site customized courses
- n specific applications, instrumentation or software increased.
Regardless, the present main focus on applications means that if you have a problem, you don’t always know how to solve it. For us, chromatography has always been at the center; for many scientists today it is simply a tool – and that’s a big difference. Te solid fact remains that the better you know the fundamentals, the better you can apply the technique. I think the only way to correct our trajectory is to re-introduce fundamental basic courses, covering the consequences and the theory – and how to apply techniques. We need to take great care in what we learn fundamentally; for example, interpretation of mass spectra, method development, and even the many different LC columns available. Take the latter example – there are hundreds
- f similar columns for reversed phase liquid chromatography.
What do you select if you’re a newcomer or just an application guy in your lab, if you don’t know anything about the fundamentals
- f the technique? People rely on commercial leaflets – on what
they’re being told at the conferences or, later on, perhaps what’s in Te Analytical Scientist or other magazines. Most people using chromatography or mass spectrometry today don’t look in detail at the literature, which is, admittedly, nearly impossible as there are so many (too many) publications. To cope, you have to select papers that are closely linked to your own field, but that doesn’t give you the broad ‘helicopter’ view that we had in the past. Our customers are very well aware of the possibilities and also
- f their limitations, and that’s the reason why we can continue to
be successful. To be honest, if our customers had the same level of knowledge and know-how as us, then we would have no reason to exist. And I guess, in a way, my call for more – and better – training in fundamentals could actually be bad for business, but I’m not overly concerned...
Old science, old technology, old sample preparation... Let’s not get old
Quality of analytical data depends on the quality of the sampling procedure and the sample preparation – basically, the better your sample prep, the better your data. In recent years, we have made important progress in sample preparation and its automation, but introduction of these achievements in labs is rather slow. It’s just incredible what is still going on today. We still have
- fficial methods, not only in Europe but also in the US, that rely
- n huge quantities of sample and potentially toxic solvents – even
in environmental methods, ironically. For example, one of the
- fficial methods in European countries (which I will not name)
requires that you take one liter of wastewater, and extract with 100 ml dichloromethane – manually. Ten you start to evaporate the dichloromethane and perform the analysis. Clearly, that’s not at all state-of-the-art. You can easily miniaturize the whole procedure – and even do in-vial extraction in an autosampler. Unfortunately, such procedures are often not accepted by regulatory authorities, who apparently prefer the old technology. Another example is the still intensively applied Soxhlet extraction, invented in 1879, for solid matrices. Going back to the dioxin crisis, the PCB method we developed for the industry long before the crisis was extremely advanced