Fungicide Residues, Determination of Dyrene in Apples by Application of the Zincke Reaction

Abstract

cohol to each flask to give a volume of 10 ml. Add 5 ml. of 5N hydrochloric acid to each flask and proceed with the hydrolysis and color development as described above.

Alkoxy derivatives of dyrene: identification and carboxylesterase inhibition

“…Determination of the fungicide Dyrene [2,4-dichloro-6-(o-chloroanilino)-5-triazine] based on chlorinated ,5-triazine, o-chloroaniline, and chlorine were reported previously. Pyridine-alkali reaction (Zincke, 1904), based on active halogens of the .s-triazine moiety, was used for determination of Dyrene (Barry and Lisk, 1959;Burchfield and Schuldt, 1958;Burchfield and Storrs, 1956a;MacDougall et al, 1964), atrazine and simazine and related chloro-i-triazines ; Ragab and McCollum, 1968). The aniline moiety diazotized after acid hydrolysis of Dyrene was used in another method (Meagher et al, 1959).…”

Pesticides

“…Barry and Lisk(5) reported a method for determining residues of 2,4-dichloro-i v i d u a l n o t d i r e c t l y a s s o c i a t e d w i t h s c i t e i s p r o h i b i t e d .…”