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

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Title A spectrophotometric method for the micro-determination of piperonyl butoxide in the presence of pyrethrins.
 
Creator Bhavnagary, H. M.
Ahmed, S. M.
 
Subject 10 Spectroscopic and Spectrometric analysis
 
Description 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.
 
Date 1973
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://ir.cftri.com/2597/1/Analyst%2C%20November%2C%201973%2C%20Vol.%2098%2C%20pp.%20792-796.pdf
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..