Quantitative analysis of s-triazine herbicides by glass capillary column gas-liquid chromatography

Abstract

The quantitative analysis of s-triazines in model mixtures and real samples was performed on a glass capillary column, which is convenient for multi-component analyses, with Carbowas 20M as stationary, with two detection systems, viz., a flame-ionization detector (FID) and an alkali flame detector (AFD). The range of linear response of both the FID (the range range studied was 10–2000 ng of six s-triazines) and the AFD (the range studied was 1–200 ng of four s-triazines) was determined. Analytical curves were evaluated by linear regression. The limit of detection (amount which gives a peak equivalent of three times the baseline noise) of injected standards was found to be 5–10 ng of s-triazines with an inlet splitting ratio of 1:90 for the FID and 50–70 pg for AFD at an inlet splitting ratio of 1:20. By comparing the results of quantitative analyses on glass capillary columns and packed columns it was determined that the same results could be obtained on both, but on the former it is possible to analyse quantitatively multi-component risidues of s-triazines in environmental samples.