Monitoring of pesticide residues in vegetables collected from retail markets of Dhaka district of Bangladesh using QuEChERS Extraction and Gas Chromatography

Rakibul Hasan,Mohammad Dalower Hossain Prodhan,Sm Mizanur Rahman,Deeder Sultana,Md Mahadi Alam

doi:10.3329/aajfss.v5i2.56957

Abstract

The present study was aimed to detect and quantify major organophosphorus pesticide residues in cauliflower and cucumber collected from different retail markets of Dhaka city, Bangladesh. In this study, a total of 50 vegetable samples (30 samples of cauliflower and 20 samples of cucumber) were analyzed using Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) extraction technique and Gas Chromatography coupled with Flame Thermionic Detector (GC-FTD). Among the 30 analyzed samples of cauliflower, 5 samples (16.7% of the total number of samples) contained residues of chlorpyrifos, quinalphos, acephate and dimethoate, where 4 samples contained multiple pesticide residues. All the contaminated samples of cauliflower contained residues above the EU-MRL. On the other hand, among the 20 analyzed samples of cucumber, only 2 samples (10% of the total number of samples) contained residues of quinalphos and chlorpyrifos at a level being below the EU-MRL. This study reflects the overall scenario of pesticide residues remain in cauliflower and cucumber purchased from different local markets of Dhaka city, which will help the consumer to be aware of their health and safety. The findings derived from this study reveals the public health concern due to the potential of pesticide toxicity in vegetables for the consumers. Therefore, continuous monitoring on the use of pesticides in vegetables should be strengthened. Asian Australas. J. Food Saf. Secur. 2021, 5 (2), 63-70

Highlights

Vegetables are commonly used to fulfill the balance diet requirement as they are a vital source of vitamins and fiber
Pesticide residues in cauliflower The concentrated extracts of cauliflower samples collected from different markets of Dhaka city were analyzed by GC-2010 (Shimadzu) with Flame Thermionic Detector (FTD) with the pre-set parameters
In this study, a total of 50 vegetable samples comprised of 30 samples of cauliflower and 20 samples of cucumber collected from different retail markets (Banani Bazar, Rampura Bazar, Mohammadpur Krishi Market, Kawran Bazar and Jatrabari Bazar) of Dhaka district, Bangladesh were analyzed for the quantification of pesticide residues to ensure food safety

Summary

Introduction

Vegetables are commonly used to fulfill the balance diet requirement as they are a vital source of vitamins and fiber. It makes up a major portion of the diet of humans in many parts of the world and play a significant role in human nutrition, especially as sources of vitamins (C, A, B1, B6, B9, E), minerals, dietary fiber and phytochemicals (Wargovich, 2000; Dias and Ryder, 2011). The cauliflower and cucumber are the two important vegetables grown commercially in Bangladesh. Cauliflower is low in fat, high in dietary fiber, contains water and vitamin C, possessing a very high nutritional density. The warm and humid climatic condition of the.

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Conclusion