Conference paper
Interference of solvent impurities in pesticide residues analysis by gas chromatography
M. Klobučar
; Pliva, tvornica farmaceutskih i kemijskih proizvoda, Zagreb
Lj. Marčelja
; Pliva, tvornica farmaceutskih i kemijskih proizvoda, Zagreb
V. Slukan
; Pliva, tvornica farmaceutskih i kemijskih proizvoda, Zagreb
Abstract
The analysis of samples of milk powder (conventionally used in baby foods manufacture control) can give essentially higher results for the content of some pesticides. The influence of undefined impurities (introduced with solvents) on samples was studied by the following methods: a) variations in operating conditions of GLC, b) application of a very thin layer in TLC, c) addition of known amounts of active principle to the sample, d) combination of GLC and mass spectroscopy. Although the isolation and determination of interfering components by the use of a combination of GLC and mass spectroscopy were not successful, it was proved that the concentrations of aldrin and α-HCH in almost all samples are lower than the values suggested by conventional analytical procedures.
Keywords
Hrčak ID:
167782
URI
Publication date:
5.9.1974.
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