Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/7033
Title: An extractive colorimetric method for determination of pentachlorophenol (PCP)
Authors: Sao, Aruna
Pillai, Ajai K
Gupta, V K
Keywords: Spectrophotometry determination
Pentachlorophenol
Cetyltrimethylammoniumbromide
Issue Date: May-2006
Publisher: CSIR
Series/Report no.: G01J3/00
Abstract: A new extractive spectrophotometric method, which is sensitive, is described for the determination of pentachlorophenol (PCP), a widely used insecticide and herbicide. The method is based on the reaction of pentachlorophenol with concentrated nitric acid at elevated temperature to form chloranil, which liberates iodine with potassium iodide. The liberated iodine then forms yellow brown coloured complex with cetyltrimethyl-ammoniumbromide (CTAB) having absorption maximum at 390 nm and extractable into isoamyl alcohol. Beer’s law is obeyed over the concentration range of 2.5-20 <img src='/image/spc_char/micro.gif' border=0>g of PCP in a final solution 100 mL (0.025-0.20 ppm) and has molar absorptivity and Sandell’s sensitivity values of 9.6<img src='/image/spc_char/cross.gif' border=0>10<sup>5</sup> L mol<sup>-1</sup> cm<sup>-1</sup> and 0.000277-<img src='/image/spc_char/micro.gif' border=0>gcm<sup>-2</sup>, respectively. The detection limit and quantification limit for the proposed method is found to be 0.0018 and 0.0063 ppm, respectively. The method has been satisfactorily applied for the determination of PCP in water, plant material and biological samples.
Description: 294-297
URI: http://hdl.handle.net/123456789/7033
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.13(3) [May 2006]

Files in This Item:
File Description SizeFormat 
IJCT 13(3) 294-297.pdf54.58 kBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.