High Density Solvent Based Dispersive Liquid-Liquid Microextraction Technique for Simultaneous and Selective Extraction of Multiclass Pesticide Residues in Water and Sugarcane Juice Samples

Teshome Tolcha,Negussie Megersa

doi:10.4236/ajac.2018.94018

Abstract

In this study, a miniaturized analytical technique based on high density solvent based dispersive liquid-liquid microextraction (HD-DLLME) was developed for extraction of trace residues of multiclass pesticides including three striazine herbicides, two organophosphate insecticides and two organochlorine fungicides from environmental water and sugarcane juice samples. The analytical method was validated and found to offer good linearity: R2 ≥ 0.991; repeatability varied from 0.73% - 5.28%; reproducibility varied from 1.14% - 8.74% and limit of detection ranged from 0.005 to 0.02 μg/L. Moreover, accuracy of the optimized method was evaluated and the recovery was varied from 80.39% - 114.05%. Analytical applications of this method to environmental waters and sugarcane juice samples indicate the presence of trace residues of ametryn in the lake water and sugarcane juice samples. Atrazine and ametryn were also detected in irrigation water.

Highlights

During the recent years, potential health risks originated from pesticides and other organic pollutant residues in food and environment have become the major threats attracting the attentions of legislative authorities [1] [2]
A miniaturized analytical technique based on high density solvent based dispersive liquid-liquid microextraction (HD-DLLME) was developed for extraction of trace residues of multiclass pesticides including three s-triazine herbicides, two organophosphate insecticides and two organochlorine fungicides from environmental water and sugarcane juice samples
The major purpose of the current study is to develop a new analytical method based on HD-DLLME for simultaneous isolation and enrichment of trace quantities of seven multiclass pesticides: three s-triazine herbicides, two organophosphate insecticides and two organochlorine fungicides; from contaminated water samples collected from Hawassa Lake and Wonji Shoa sugarcane irrigation, and sugarcane juice samples in Ethiopia

Summary

Introduction

Potential health risks originated from pesticides and other organic pollutant residues in food and environment have become the major threats attracting the attentions of legislative authorities [1] [2]. Megersa chemical classes of pesticides that are widely used for controlling or killing of plant diseases and weeds include the s-triazine herbicides [3] [4], organophosphate insecticides [5] [6] [7] and organochlorine fungicides [8] [9]. Despite their usefulness in agriculture and health sectors, their extensive uses resulted in contamination of the atmosphere, environmental waters, soils and agricultural products [10] [11] [12]. Efforts for investigating analytical methods that are requiring simpler equipments must be considered for enabling fairly reliable and accurate analysis of the pollutant residues to safeguard human health risks and support the compliance and enforcement of the laws and regulations pertaining to the food safety

Objectives

Results

Conclusion