Investigation of a pulsed-laser thermo-optical absorbance detector for the determination of food preservatives separated by capillary electrophoresis
KC Waldron, J Li - Journal of Chromatography B: Biomedical Sciences …, 1996 - Elsevier
Thermo-optical absorbance (TOA) detection using a KrF excimer waveguide laser for
detection of benzoic acid, dehydroacetic acid and sorbic acid separated by capillary
electrophoresis (CE) was studied. Detection limits were, on average, ten times better than
those for on-column UV absorbance methods with CE, and two or more times better than
those for UV absorbance with HPLC. The influence of increased laser power on TOA
detection sensitivity was found to be strong for benzoic and dehydroacetic acids but quite …
detection of benzoic acid, dehydroacetic acid and sorbic acid separated by capillary
electrophoresis (CE) was studied. Detection limits were, on average, ten times better than
those for on-column UV absorbance methods with CE, and two or more times better than
those for UV absorbance with HPLC. The influence of increased laser power on TOA
detection sensitivity was found to be strong for benzoic and dehydroacetic acids but quite …
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