DEVELOPMENT OF ANALYTICAL METHOD FOR DETERMINATION OF DITHIOCARBAMATE RESIDUES, EXPRESSED AS CS2 IN FRUITS AND VEGETABLES BY GC-ECD

2021 ◽  
Vol 36 (06) ◽  
Author(s):  
NGOC VINH NGUYEN ◽  
THE TAN LE
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Analytical Method ◽  
Pesticide Residues ◽  
Fruits And Vegetables ◽  
Electron Capture Detector ◽  
Research Results ◽  
Vegetable Samples

This report presents the development of analytical method for determination of dithiocarbamat fungicides (DTCs) residues in vegetables through CS2 using gas chromatography with electron capture detector (GC-ECD). Research results show that the method recovery ranges from 84.9 – 98.7% and meets the requirement for pesticide residues analyzing. This method has also been applied for analyzing 12 vegetable samples collected in Tan Dinh and Thi Nghe markets. The results showed that the majority of DTCs levels of these samples are lower LOD value except sample BC2 (0.08 mg/g) and sample X3 (0.11 mg/g).

scholarly journals Analysis of Multi-Residue Pesticides in Vegetable Samples Using Solid-Phase Micro-Extraction (SPME) Coupled to Gas Chromatography-Electron-Capture Detector (GC-ECD)

2018 ◽  
Vol 3 (1) ◽  
pp. 7-13
Author(s):  
Devendra Kumar Patel
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Solid Phase ◽  
Food Contamination ◽  
Electron Capture Detector ◽  
Solid Phase Micro Extraction ◽  
Vegetable Samples ◽  
Relative Standard ◽  
Pesticides Residue

A fast, simple, solvent less and inexpensive sample preparation method based on Head space solid-phase micro extraction (HS-SPME) coupled to gas chromatography-electron-capture detector (GC-ECD) is proposed for the determination of mix pesticide residues from vegetable samples. Polydimethylsiloxane (PDMS, 100 μm) fiber was used in this study. The mix pesticides (24 nos.) including organochlorines (15), organophosphates (06) and synthetic pyrethriods (03) were analysed in the vegetable samples (Cabbage, Tomato, Cauliflower, Chilli, Okra, Brinjal, Bottle gourd, Cucumber, Beetroot, Spinach, and Radish) collected from in and around of Lucknow city, India. Present study revealed the presence of HCH, DDT, methylparathion, malathion, chlorpyrifos, monocrotophos, endosulfan, cypermethrin, fenvalerate pesticides. Pesticides residue levels were compared with MRL fixed by Prevention of Food Adulteration Act (PFA), Govt. of India 1954. The method detection limits were in a linearity range of 0.003 - 0.024 mg/kg. A recovery percent varies from 86.1 to 96.4% with relative standard deviation (RSD) of 14%. The outcomes of the present study point towards the crucial need of implementing strict government’s rules related to food safety in order to put check on these kinds of health hazardous food contamination.

Gas Chromatographic Determination of N-Butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine and α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine in Formulations

1971 ◽  
Vol 54 (3) ◽  
pp. 711-712
Author(s):  
Martha Fuzesi
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Electron Capture ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Electron Capture Detector ◽  
Reference Solution ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the quantitative determination of N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-tolindine and α,α,α-trifluoro-2,6-dinitro-N,N-dipropyI-p-toluidine herbicides in formulations. The sample is extracted with benzene, and equal amounts of sample and reference solution in the same concentration range are analyzed by gas chromatography, using an electron capture detector and an SE-30/Diatoport S column. The method has been applied successfully to laboratory-prepared and commercial samples.

Comparison of Laboratory Techniques for the Determination of Pesticide Residues in Milk

1963 ◽  
Vol 46 (2) ◽  
pp. 209-215
Author(s):  
J Lloyd Henderson
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Pesticide Residues ◽  
Colorimetric Method ◽  
Laboratory Techniques ◽  
Test Electron ◽  
Chloride Determination ◽  
Low Levels ◽  
Organic Chloride

Abstract Of the techniques available for specific pesticide residues, fly bioassay is non-specific and not very sensitive; total organic chloride determination also lacks specificity; the AOAC colorimetric method produces variable results, lacks sensitivity for low levels of residues, and does not cover the range of residues likely to be present in milk. Chromatographic tests are most satisfactory. Microcoulometric gas chromatography has many advantages but requires a skilled analyst. Electron-capture gas chromatography is promising but has not been fully developed. The Mills test, which combines column cleanup with identification by paper chromatography, is a rapid, practical screening test. In a collaborative comparison of the chromatographic procedures, microcoulometry tended to give higher results than the Mills test; electron-capture gave lower results than the other two methods. Details of all tests must be followed closely for good results.

Determination of indicator polychlorinated biphenyls (PCBs) by gas chromatography–electron capture detector

Chemosphere ◽  
2013 ◽  
Vol 93 (8) ◽  
pp. 1556-1560 ◽  
Author(s):  
Samuel Afful ◽  
Johannes A.M. Awudza ◽  
Stevester K. Twumasi ◽  
Shiloh Osae
Keyword(s):  
Gas Chromatography ◽  
Polychlorinated Biphenyls ◽  
Electron Capture ◽  
Electron Capture Detector

Determination of the Herbicide Tordon (4-Amino-3,5,6- trichloropicolinic Acid) in Soil by Electron Capture Gas Chromatography

1967 ◽  
Vol 50 (3) ◽  
pp. 637-641
Author(s):  
J G Saha ◽  
L A Gadallah
Keyword(s):  
Gas Chromatography ◽  
Methyl Ester ◽  
Phosphoric Acid ◽  
Electron Capture ◽  
Analytical Method ◽  
Free Acid ◽  
Soil Samples ◽  
Minimum Amount

Abstract A method is presented for determining the herbicide tordon (4-amino-3,5,6-trichIoropicolinic acid) in soil. It involves extraction of tordon as the free acid with acetone and phosphoric acid, followed by esterification with diazomethane and estimation of the methyl ester by electron capture gas chromatography. Recoveries of tordon added to soil samples at 0.05—1.0 ppm were between 83 and 92%. The minimum amount detectable by this method was 0.01 ppm. The difficulties of developing an analytical method for this compound are discussed in the light of its structure and solubility

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