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Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP) >
BVAAP Vol.17 [2009] >
BVAAP Vol.17(2) [December 2009] >
| Title: | Assay of some organophosphorus insecticides with N- bromosuccinimide reagent |
| Authors: | Shukla, I.C
Singh, B.K
Kumar, Vinod
Upadhyay, Renu |
| Issue Date: | Dec-2009 |
| Publisher: | CSIR |
| Abstract: | A quick, convenient and simple method has been developed
for the micro determination of organophosphorus insecticides e.g. malathion,
dimethoate, ethion, phorate, diazinon and thiometon in technical form and in
their formulations. Aliquots containing 1-5mg of the sample were taken in a
100mL conical flask and 5mL of 0.02N N-bromosuccinimide (NBS), 5mL of 4N HCl
and 10mL of glacial acetic acid were added to it. The contents were shaken well
and allowed to react for 10-15 minutes at room
temperature. After required reaction times, 10mL of 10%
potassium iodide was added to it and allowed to stand for a minute. The
liberated iodine was titrated against 0.02N standardised sodium thiosulphate
solution using starch as indicator. A blank experiment was also run under
identical conditions using all the reagents except the sample. By the
calculation of coefficient of variation (CV) and standard deviation (SD)
values, it becomes evident that the suggested method is reproducible and
precise. |
| Page(s): | 175-181 |
| ISSN: | 0975-2412 (Online); 0771-7706 (Print) |
| Source: | BVAAP Vol.17(2) [December 2009]
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