Premium
Degradation of organophosphorus pesticides in aqueous extracts of young green barley leaves ( Hordeum vulgare L)
Author(s) -
Durham Janis J,
Ogata Joji,
Nakajima Sadatoshi,
Hagiwara Yoshihide,
Shibamoto Takayuki
Publication year - 1999
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/(sici)1097-0010(19990715)79:10<1311::aid-jsfa370>3.0.co;2-e
Subject(s) - malathion , methidathion , diazinon , parathion , hordeum vulgare , chemistry , pesticide , chlorpyrifos , aqueous solution , degradation (telecommunications) , pesticide degradation , chromatography , food science , botany , agronomy , biology , poaceae , organic chemistry , telecommunications , computer science
The degradation of the organophosphorus pesticides malathion, chlorpyrifos, guthion, diazinon, methidathion and parathion in an aqueous extract of young green barley leaves ( Hordeum vulgare L) was monitored by gas chromatography. Aqueous solutions of various amounts of freeze‐dried young barley leaves containing 5.75 mg l −1 of malathion were incubated at 37 °C and pH 7.4 over prolonged time periods. Over 95% of the malathion degraded in 4 h in a 3% (30 g l −1 ) solution of young green barley leaves. When the barley solution was autoclaved at 120 °C for 25 min prior to the addition of malathion, no degradation of malathion was observed. When 10 mg l −1 each of the above six pesticides was incubated in a 15% (150 g l −1 ) solution of young green barley leaves for 3 h at 37 °C and pH 7.4, malathion and chlorpyrifos degraded 100%, whereas parathion (75%), diazinon (54%), guthion (41%) and methidathion (23%) showed lesser degrees of degradation. © 1999 Society of Chemical Industry