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The influence of piperonyl butoxide and ddt on the determination of the pyrethrins content of commercial spray‐insecticides by the A.O.A.C. and the seil methods
Author(s) -
Warren G. J.
Publication year - 1953
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/jsfa.2740040405
Subject(s) - piperonyl butoxide , chemistry , potassium hydroxide , petroleum ether , hydrolysis , ether , potassium , alkaline hydrolysis , chromatography , pesticide , organic chemistry , toxicology , toxicity , extraction (chemistry) , agronomy , biology
The estimation of total pyrethrins either by the A.O.A.C.* method of analysis or the Seil method yields high results in the presence of the synergist piperonyl butoxide, or DDT. Both these compounds, on hydrolysis with alcoholic potassium hydroxide, produce acidic substances which, being apparently only slightly soluble in light petroleum and non‐volatile in steam, do not affect appreciably the estimation of pyrethrins I, but, being soluble in ether, give falsely high results for pyrethrins II by either method.