Extractive Spectrofluorometric Determination of Quinalphos Using Fluorescein in Environmental Samples

Authors: Suvardhan, K.¹; Kumar, K.¹; Chiranjeevi, P.²

Source: Environmental Monitoring and Assessment, Volume 108, Numbers 1-3, September 2005 , pp. 217-227(11)

Publisher: Springer

Buy & download fulltext article:

Price: $47.00 plus tax (Refund Policy)

Abstract:

A simple, sensitive, convenient and low cost spectrofluorometric technique for determination of quinalphos is described. Quinalphos is decomposed with sodium ethoxide. Resultant sodium diethyl thiophosphate (Na-DETP) is extracted with a cationic fluorescein as ion pair complex into 1-chloro-2-nitrobenzene. The fluorescence of the ion pair, fluorescein-DETP is measured at 530 nm after excitation at 490 nm. This technique is applicable for the determination of quinalphos in water, food grains and vegetable samples up to ng level with Amberlite XAD-4.

Keywords: fluorescein; quinalphos; spectrofluorometry; vegetables and food grains; water

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10661-005-4690-x

Affiliations: 1: Environmental Monitoring Laboratory, Department of Chemistry, S. V. University, Tirupati, Andhra Pradesh, India, 2: Environmental Monitoring Laboratory, Department of Chemistry, S. V. University, Tirupati, Andhra Pradesh, India, Email: chiranjeevi_sai@yahoo.co.in

Publication date: 2005-09-01