scholarly journals ANALYSIS OF FENPROPATHRIN, LAMBDA-CYHALOTHRIN, AND CHLOROTHALONIL IN POTATO AND TOMATO SAMPLES USING GAS CHROMATOGRAPHY WITH AN ELECTRON CAPTURE DETECTOR

2018 ◽  
Vol 10 (1) ◽  
pp. 70
Author(s):  
Nadia Rahmiani ◽  
Harmita . ◽  
Herman Suryadi
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Limit Of Detection ◽  
High Sensitivity ◽  
Electron Capture Detector ◽  
Gas Chromatograph ◽  
Vegetable Sample ◽  
Lambda Cyhalothrin ◽  
Limit Of Quantitation ◽  
Validation Tests

Objective: This study aimed to analyze pesticide contents in potato and tomato samples.Methods: In the present study, we determined the presence of the pesticides fenpropathrin, lambda-cyhalothrin, and chlorothalonil in conventionaland organic potatoes and tomatoes using a gas chromatograph equipped with an electron capture detector and validated the associated methods.Acetone-based extraction was performed using the Dutch mini-Luke method with minimal weights and volumes.Results: Validation tests showed a range of 70–120% and precision of ≤20%, and linearity tests on the three standard pesticides gave r values of≥0.9990 for all three pesticides. Limit of detection and limit of quantitation values showed high sensitivity, although in vegetable sample analyses,none of the three pesticides were detected.Conclusion: Our data show that the chosen method for analysis of the pesticides fenpropathrin, lambda-cyhalothrin, and chlorothalonil in potatoesand tomatoes is valid and that the marketed potatoes and tomatoes meet the SNI 7313: 2008 standard for “Maximum Limits of Pesticide Residues onAgricultural Products” and the associated Japanese standards

Gas Chromatographic Determination of Pentachlorophenol in Gelatin

1984 ◽  
Vol 67 (2) ◽  
pp. 275-277
Author(s):  
Arnold P Borsetti ◽  
Lee S Thurston
Keyword(s):  
Gas Chromatography ◽  
Liquid Phase ◽  
Electron Capture ◽  
Limit Of Detection ◽  
Direct Determination ◽  
Chromatographic Determination ◽  
Gelatin Matrix ◽  
Limit Of Quantitation ◽  
Acetate Derivative

Abstract A method is described for the determination of pentachlorophenol (PCP) in gelatin. The method employs acid and heat to hydrolyze the gelatin matrix, a base partition and wash for separation and cleanup, and a reacidification and extraction with hexane for direct determination of PCP, without preparation of a derivative, using gas chromatography (GC) with a 1% SP-1240DA liquid phase and a 63Ni electron capture detector. Recoveries averaged 106% for fortifications between 0.02 and 1.0 ppm. The limit of quantitation is 20 ppb. The limit of detection is 4-6 ppb. The method, which has undergone a successful intralaboratory trial, is simple and rapid, and requires only general laboratory reagents and equipment. GC of the acetate derivative of PCP is used for confirmation of identity.

scholarly journals Determination of Chloramphenicol Residue in Chicken Tissues by Immunoaffinity Chromatography Cleanup and Gas Chromatography with aMicrocell Electron Capture Detector

2006 ◽  
Vol 89 (2) ◽  
pp. 369-373 ◽  
Author(s):  
Suxia Zhang ◽  
Jinhui Zhou ◽  
Jianzhong Shen ◽  
Shuangyang Ding ◽  
Jiancheng Li
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Chicken Liver ◽  
Electron Capture Detector ◽  
Immunoaffinity Column ◽  
Chicken Tissues ◽  
Chicken Muscle ◽  
Limit Of Quantitation ◽  
Sepharose 4B

Abstract A rapid and sensitive gas chromatography (GC) method was developed to detect chloramphenicol in chicken tissues. The extracted samples were cleaned up using the immunoaffinity column prepared by coupling antichloramphenicol monoclonal antibody with cyanogen bromide-activated Sepharose 4B. The dynamic column capacity of chloramphenicol was 3265 ng/mL gel. The eluate was evaporated to dryness, and residues were derivatized and determined by GC with a microcell electron capture detector. Average recoveries were 86.6 to 96.9 for chicken muscle and 74.3 to 96.1 for chicken liver. The limit of quantitation of the method was 0.05 ng/g for chicken muscle and 0.1 ng/g for chicken liver.

Capillary Gas Chromatographic Determination with Electron Capture Detector of β-Propiolactone in Biological Materials

1991 ◽  
Vol 74 (4) ◽  
pp. 595-599
Author(s):  
Aziz Geahchan ◽  
Bruno Fouillet ◽  
Paul Chambon ◽  
Renee Chambon ◽  
Bahia Nouri
Keyword(s):  
Electron Capture ◽  
Limit Of Detection ◽  
Chromatographic Determination ◽  
Biological Materials ◽  
Electron Capture Detector ◽  
Detector Response ◽  
Limit Of Quantitation ◽  
Low Levels ◽  
Ppm Level

Abstract A method has been developed for the determination of β- propiolactone by derivatizing it to the volatile N-hexyl-3- heptafluorobutanoyloxypropanamide, which can be separated and Identified by a capillary CP-Sil 8 column, and detected by an electron capture detector (ECD). First, β- propiolactone is reacted with N-hexylamine to yield N-hexyl- 3-hydroxypropanamide. The fluorobutanoyl ester derivative is next prepared by using heptafluorobutyrlc acid anhydride in the presence of trimethylamine. The method Is very sensitive, simple, and specific, and can be used to detect and quantitate residual β-propiolactone In Iyophilized biological materials. The limit of detection is 0.2 ppm β-proplolactone in a 50 mg sample; however, because of variability at low levels, the limit of quantitation is 1 ppm. Detector response was linear for 2-500 ng β-propiolactone. Recoveries were 98% or greater from Iyophilized vaccines spiked at the 2-20 ppm level. No side products or interference peaks were observed in the derivatization reaction.

Development and Validation of an Automated Gas Chromatography Method for Determination of Dichloromethane in Ampicillin Sodium by Using Capillary Column Technology

2020 ◽  
Vol 16 (7) ◽  
pp. 901-908
Author(s):  
Manisha Trivedi ◽  
Elsy Raynil John ◽  
Faraat Ali ◽  
Anuj Prakash ◽  
Robin Kumar ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Capillary Column ◽  
Limit Of Detection ◽  
Direct Injection ◽  
High Sensitivity ◽  
Chromatography Method ◽  
Ampicillin Sodium ◽  
Static Headspace Gas Chromatography ◽  
Limit Of Quantitation

Background: The main aim of the study was to develop an automated static headspace gas chromatography (SHS-GC) method for determination of dichloromethane (DCM) in ampicillin sodium by using a capillary column. Methods: SHS-GC also known as gas chromatography-headspace is the technique of choice due to its high sensitivity, excellent separation abilities, low limit of detection and simplicity of the instrumentation used for the technique. The headspace sampling method has more appropriate sensitivity than the direct injection method because it can clearly separate volatile analytes from the sample matrix and effectively concentrate them. Therefore, this method results in less complex sample preparation, decreased instrument contamination, and increased capillary column life. Results: The developed SHS-GC method showed symmetrical peak shape reasonable retention time for DCM. A linear relationship was obtained over the range of 2-240 μg mL-1 with a correlation coefficient (r2) of 0.993. The recovery, system precision and robustness of the method were within the acceptable values. The Limit of Detection (LOD) and Limit of Quantitation (LOQ) were 0.5 μg mL-1 and 2 μg mL-1 respectively. Conclusions: The results obtained in this study demonstrate that SHS-GC method is selective, precise, linear, accurate and robust for determination of dichloromethane in ampicillin sodium and its formulation (injection).

Halogenated compounds for the sensitive detection of clostridia by gas chromatography

1972 ◽  
Vol 18 (10) ◽  
pp. 1519-1523 ◽  
Author(s):  
Brij M. Mitruka ◽  
Martin Alexander
Keyword(s):  
Gas Chromatography ◽  
Organic Acids ◽  
Electron Capture ◽  
Clostridium Perfringens ◽  
Electron Capture Detector ◽  
Sensitive Detection ◽  
Gas Chromatograph ◽  
Halogenated Compounds ◽  
Clostridium Species

Metabolites formed by the equivalent of 230 to 3000 cells of several Clostridium species were detected by use of a gas chromatograph fitted with an electron capture detector. A variety of organic acids, alcohols, and ketones were produced by growing cultures of the 10 species tested. Compounds excreted by 300 to 3000 cells of 12 strains of Clostridium perfringens were detected, and both common and dissimilar metabolites were formed by these strains. The sensitivity for detecting six Clostridium species increased up to several thousandfold when chlorophenoxyacetates were added to the medium, the increase being most marked with 2,4-di- and 2,4,5-trichlorophenoxyacetates. The results show that cometabolism is useful in increasing the sensitivity and speed of detection of Clostridium species.

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.

Rapid analysis of cyclamate in foods and beverages by gas chromatography-electron capture detector (GC-ECD)

2012 ◽  
Vol 134 (4) ◽  
pp. 2424-2429 ◽  
Author(s):  
Shengbing Yu ◽  
Binghui Zhu ◽  
Fen Lv ◽  
Shaoxiao Li ◽  
Weixiong Huang
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Rapid Analysis ◽  
Electron Capture Detector

ANALYSIS OF C4 EXPLOSIVE RESIDUES ON POST BLAST HAIR SAMPLES

2012 ◽  
Vol 57 (1) ◽  
Author(s):  
UMI KALTHOM AHMAD ◽  
NOOR HIDAYAT ABU BAKAR ◽  
SHAIKH ABDUL ADZIZ SHAIKH ABDULLAH
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Capillary Column ◽  
Human Head ◽  
Electron Capture Detector ◽  
Pentaerythritol Tetranitrate ◽  
High Explosives ◽  
Hair Samples

The occurrence of crimes involving high explosives in Malaysia in recent years has warrant the need for the analysis of high explosives in post blast samples, particularly residues that could be found on hairs of victims. This study reports on the detection of post blast residues of C4 explosives on human head hairs. Prior to a simulated explosion, a bundle of hair (200 strands) was tightly bound to a metal hook at each point of several pre–determined distances from the bomb seat. Hair samples containing post blast residues were extracted by ultrasonication using acetonitrile. Two analytes of interest, cyclotrimethylenetrinitramine (RDX) and pentaerythritol tetranitrate (PETN) were successfully separated using gas chromatography with electron capture detector (GC–ECD) on an HP5–MS capillary column. It was found that the amount of explosive residues decreased with increasing distance from the point of blast. At the nearest specified distance of 2.5m, the amount of PETN residues deposited on hair was much less compared to that of RDX residues.

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