RETENTION TIME REPEATABILITY AS A FUNCTION OF THE INJECTION AUTOMATISM IN THE ANALYSIS OF TRACE ORGANOCHLORINATED COMPOUNDS WITH HIGH-RESOLUTION GAS-CHROMATOGRAPHY
L. Berdie et al., RETENTION TIME REPEATABILITY AS A FUNCTION OF THE INJECTION AUTOMATISM IN THE ANALYSIS OF TRACE ORGANOCHLORINATED COMPOUNDS WITH HIGH-RESOLUTION GAS-CHROMATOGRAPHY, Journal of chromatography, 778(1-2), 1997, pp. 23-29
Citations number
11
Categorie Soggetti
Chemistry Analytical","Biochemical Research Methods
Short-term precision in retention time determination of different inje
ction systems (three manual and three autosamplers) is assessed in the
present study. This evaluation has been performed on eight different
instrumental set-ups equipped with the same type of capillary column (
30 m, 5% phenyl-95% methyl) which have been used for the analysis of s
tandard mixtures of alpha-, gamma-, and delta-hexachlorocyclohexanes.
The results show that, as expected, retention time repeatability incre
ases with the degree of automatization of the injection system. They a
lso show that only the autosamplers and the manual injector provided w
ith the syringe-operated start device are suitable for analysis of com
pounds with retention time differences in the order of 0.1 min. Conver
sely, none of the systems included in the study, not even the autosamp
lers, is adequate for the analysis of analytes having retention time d
ifferences of about 0.01 min. (C) 1997 Elsevier Science B.V.