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A spectrophotometric method for the micro-determination of piperonyl butoxide in the presence of pyrethrins.

Bhavnagary, H. M. and Ahmed, S. M. (1973) A spectrophotometric method for the micro-determination of piperonyl butoxide in the presence of pyrethrins. Analyst, 98 (1172). 792-796, 10 ref..

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Abstract

A rapid spectrophotometric method has been developed for the miclOdetermination of piperonyl butoxide in the presence of a wide range of pyrethrins, A solution of the mixture of piperonyJ butoxide and pyrethrins in a low-boiling fraction of light petroleum is evaporated on a water-bath until only a small portion of the solvent remains. The final traces of solvent are removed at 50°C and, to the residue containing piperonyl butoxide and pyrethrins, 18 per cent. mjV nitric acid is added in order to convert the piperonyl butoxide content into a soluble yellow-coloured compound. The quantitative colour reaction has a maximum absorption at 370 nm, and the method is applicable to the residues in the range 4 to 40 J'g ml-1 of piperonyl butoxide. The method is also applicable to the residues of formulated products extracted from grains and paper coatings.

Item Type: Article
Uncontrolled Keywords: spectrophotometric method, piperonyl butoxide, pyrethrins, household insect pests
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 10 Spectroscopic and Spectrometric analysis
Divisions: Food Protectants and Infestation Control
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 18 Sep 2013 06:18
Last Modified: 18 Sep 2013 06:18
URI: http://ir.cftri.com/id/eprint/2597

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