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New method for the determination on saturation concentration of dichlorvos.

Rangaswamy, J. R. and Muthu, M. (1984) New method for the determination on saturation concentration of dichlorvos. Mikrochimica Acta, 3. pp. 433-443.

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Saturation concenrtation of DDVP at room temperature (28 ~ has been determined by a colorimetric method. The saturation concentration at 28 o are 9.39 and 8.55 rag/1 for AR and technical grade samples respectively. The method consists of coupling DDVP vapours in gas-tight tubes with alkaline resorcinol at a water bath of 60--65 ~ when a yellow chromophore with an absorption maximum at 490 nm is formed. The linear relationship between the concentration of DDVP and absorbance at 490 nm holds good in the range of 1 to 20 #g DDVP. The method has been checked with a gas chromatographic method for accuracy. These values are also verified by a physical method based on Dalton's Law of partial pressures in a gaseous mixture.

Item Type: Article
Uncontrolled Keywords: Saturation concentration, liquid insecticides, Dichlorvos
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry
600 Technology > 01 Medical sciences > 17 Toxicology
Divisions: Food Protectants and Infestation Control
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 07 Mar 2018 03:52
Last Modified: 07 Mar 2018 03:52
URI: http://ir.cftri.com/id/eprint/4696

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