Analysis of Chlorpyrifos Pesticide Residues in Surface Water, Ground Water and Vegetables through Gas Chromatography

Year 2018, Volume: 13 Issue: 3, 167 - 173, 30.09.2018

Maryam Arain , Khan Muhammad Brohi Azizullah Channa Rafi O Zaman Brohi Sarmad Mushtaque Kundan Kumar Abdul Samuee

https://izlik.org/JA75UY77LB

Abstract

This work is done with the purpose of
determining residual concentration of organophosphorus pesticide (Chlorpyrifos)
in vegetables (Okra, potato), surface water and ground water. Five samples of
each vegetable, ground water and surface water were collected randomly from
eight union councils (UCs) of tehsil Mehrabpur district Naushahro Feroze.
Pesticide residues were extracted and cleaned up using standard analytical
methods USEPA 3510C and USEPA 3620C, respectively. In continuation to this
samples were analyzed through Gas Chromatography-Flame Ionization detector
(GC-FID). Results showed that the residual concentration of selected pesticide
was not more than maximum residual limit (MRL) in ground water samples, maximum
value 16µg/L was found in UC5 while minimum was 3µg/L in UC2. Whereas, in
surface water higher residual concentrations were observed having maximum and
minimum values 91.2µg/L and 25µg/L, respectively. However, in vegetable samples
15% of okra and 20% of potato samples contained residual concentration within
MRL values and rest were found with higher concentrations. The presence of such
hazardous pesticides in vegetables is a serious threat to humans relying on
them for food. Therefore, it is very much necessary to regulate the use of
hazardous pesticides in recommended areas by conducting ongoing monitoring.

Keywords

Chlorpyrifos , Gas chromatography , Vegetable , Water , Gas chromatography

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