Abstract:
Abstract
The study was conducted to analyze pesticide residues in two common vegetables
(cauliflower and tomato) collected from five different areas (Paura Bazaar, Station
Bazar, Tetultola Bazar, Terminal Bazar and Lalbag Bazar) of Rangpur city from
September 2017 to March 2018. The collected samples were carried to the Pesticide
Analytical Laboratory, Entomology Division of Bangladesh Agricultural Research
Institute (BARI), Gazipur. The collected samples were analyzed using Quick, Easy,
Cheap, Effective, Rugged and Safe (QuEChERS) extraction technique and Gas
Chromatography (GC) coupled with Flame Thermionized Detector (FTD) for the
determination of pesticide residues in 40 samples of cauliflower and 40 samples
of tomato. Among the 40 analyzed samples of cauliflower, 6 samples (15% of the
total number of samples) contained pesticide residues of diazinon and quinalphos.
Among these 6 samples, 5 had residues above the Maximum Residue Limit (MRL) and
1 sample contained two different types of pesticide residues such as diazinon and
quinalphos. The level of detected diazinon residues was above MRL, while the level of
quinalphos residues was below the MRL and the other 34 samples (85% of the total
number of samples) contained no detectable residues of the sought pesticides. Similarly
out of 40 analyzed samples of tomato, 4 samples (10% of the total number of samples)
contained pesticide residues of acephate, dimethoate, chlorpyrifos and quinalphos.
Among these 4 samples, 3 had residues above the MRL and 1 had residues below the
MRL set by European Commission. This study reflects the overall scenario of pesticide
contamination in vegetables especially in cauliflower and tomato available in the local
markets of Rangpur District, which will help the consumer to be aware of their health
and safety.
Key words: Cauliflower, Tomato, Gas Chromatography, Pesticide residues,
QuEChERS Extraction
Description:
A Thesis
Submitted to the Department of Agricultural Chemistry
Sher-e-Bangla Agricultural University, Dhaka, in partial
fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE
IN
AGRICULTURAL CHEMISTRY
SEMESTER: JANUARY-JUNE, 2018
