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Over the last ten years or so, information gathered by applying atmospheric ionization techniques in mass spectrometry teaches us two things: 1) that liquid is a vestigial remnant of condensed-phase liquid chromatography and 2) that solvent in the gas phase limits ionization to molecules that are more basic than the solvent.
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Laboratories use paper notebooks to document research, experiments and procedures, similar to that of a personal journal or, in some cases, a scrapbook. Laboratory notebooks are essential wherever scientific research is conducted, where data is collected, and where ideas that could be patented are developed. The lab notebook is often considered to be a legal document and can be used in court as evidence.
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This month, Leslie Ettre briefly investigates whether the principles of chromatography - either consciously or unconsciously - were used in some ancient work.
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Waters Corporation (Milford, Massachusetts) announced its sponsorship of two American Chemical Society Achievement Awards.
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Excess variability is not acceptable in a pharmaceutical method.
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Modern gas chromatography (GC) capillary columns are rugged and forgiving but some care should be taken when handling and using these high-efficiency columns. In this installment of "Column Watch," the authors discuss the issues surrounding avoiding column breakage, stationary phase damage, and column contamination. Prolonging the life of a column by keeping an oxygen-free system, providing a cleaner sample, and not exceeding the upper temperature limit of the stationary phase are highlighted in this practical discussion.
