Gas Chromatography for Pesticide Residue Analysis; Some Practical Aspects

1965 ◽  
Vol 48 (5) ◽  
pp. 1037-1058
Author(s):  
Jerry A Burke
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residue ◽  
Pesticide Residues ◽  
Residue Analysis ◽  
Organophosphorus Pesticide ◽  
Qualitative And Quantitative Analysis ◽  
Residue Determination ◽  
Accuracy And Precision ◽  
Multiple Detection ◽  
Selective Detectors

Abstract The operations necessary for the application of gas chromatography to multiple detection of pesticide residues are described and discussed. Gas chromatography with specific or selective detectors provides qualitative and quantitative analysis of a number of pesticide residues present simultaneously in a single sample. Gas chromatography has been applied successfully to chlorinated pesticide residues; it shows promise as an analytical tool for organophosphorus pesticide residue determination. When the gas chromatography system is operating efficiently, accuracy and precision are good at the nanogram to microgram level. Rules are given to achieve reliable results by gas chromatography.

Evaluation of an Automated Gel Permeation Cleanup and Evaluation System for Determining Pesticide Residues in Fatty Samples

1987 ◽  
Vol 70 (4) ◽  
pp. 724-726
Author(s):  
Marvin L Hopper ◽  
Kenneth R Griffitt
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residue ◽  
Pesticide Residues ◽  
Evaluation System ◽  
Residue Analysis ◽  
Gel Permeation Chromatography ◽  
Pesticide Residue Analysis ◽  
Sample Matrix ◽  
Fixed Volume ◽  
Gel Permeation

Abstract The AutoVap® 600 system, used in conjunction with an automated gel permeation chromatography (GPC) instrument, automatically collects and evaporates the effluent from the GPC column, dissolves the residue in a fixed volume of desired solvent, and quantitatively transfers it to a sealed vial. This system was evaluated and found to automate efficiently the cleanup of butterfat for pesticide residue analysis. Quantitative recoveries were obtained for each of 4 pesticides fortified in butterfat and cleaned up through the system and for 12 pesticide standards in the absence of sample matrix collected through the system. After loading, the system operates unattended and will automatically prepare up to 23 individual fat samples for determination by gas chromatography without additional cleanup.

Evaluation of an Automated Gel Permeation Cleanup and Evaluation System for Determining Pesticide Residues in Fatty Samples

1987 ◽  
Vol 70 (4) ◽  
pp. 724-726
Author(s):  
Marvin L Hopper ◽  
Kenneth R Griffitt
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residue ◽  
Pesticide Residues ◽  
Evaluation System ◽  
Residue Analysis ◽  
Gel Permeation Chromatography ◽  
Pesticide Residue Analysis ◽  
Sample Matrix ◽  
Fixed Volume ◽  
Gel Permeation

Abstract The AutoVap® 600 system, used in conjunction with an automated gel permeation chromatography (GPC) instrument, automatically collects and evaporates the effluent from the GPC column, dissolves the residue in a fixed volume of desired solvent, and quantitatively transfers it to a sealed vial. This system was evaluated and found to automate efficiently the cleanup of butterfat for pesticide residue analysis. Quantitative recoveries were obtained for each of 4 pesticides fortified in butterfat and cleaned up through the system and for 12 pesticide standards in the absence of sample matrix collected through the system. After loading, the system operates unattended and will automatically prepare up to 23 individual fat samples for determination by gas chromatography without additional cleanup.

Multi-pesticide residue analysis by high resolution mass spectrometry in complementary matrices: wheat flour, lettuce and apple samples

2018 ◽  
Vol 10 (32) ◽  
pp. 3958-3967 ◽  
Author(s):  
Marilda Chiarello ◽  
Sidnei Moura
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Human Health ◽  
Pesticide Residue ◽  
Pesticide Residues ◽  
High Resolution Mass Spectrometry ◽  
Residue Analysis ◽  
Food Contamination ◽  
Pesticide Residue Analysis ◽  
Resolution Mass

Nowadays, food contamination with pesticide residues is prevalent, which can cause problems to human health.

Determination of multiple organochlorine pesticide residues in shrimp using modified QuEChERS extraction and gas chromatography

2018 ◽  
Vol 16 (1) ◽  
pp. 81-93
Author(s):  
MDH Prodhan ◽  
SN Alam
Keyword(s):  
Gas Chromatography ◽  
Organochlorine Pesticide ◽  
Pesticide Residues ◽  
Limit Of Detection ◽  
Residue Analysis ◽  
Limit Of Quantification ◽  
Modified Quechers ◽  
Endosulfan Sulphate ◽  
Organochlorine Pesticide Residues

Determination of organochlorine pesticide residues in shrimp is very important to ensure the consumer’s safety and to fulfill the importer’s demand. Therefore, a simple and efficient multiple organochlorine pesticide residues analytical method using quick, easy, cheap, effective, rugged and safe (QuEChERS) extraction technique and Gas Chromatography coupled with Electron Capture Detector (ECD) has been developed and validated for the determination of 19 organochlorine pesticides (α- BHC, δ- BHC, β- BHC, γ- BHC, Heptachlor, Aldrin, Heptachlor Epoxide, γ- Chlordane, α- Chlordane, α- Endosulfan, 4,4 DDE, Dieldrin, Endrin, 4,4 DDD, β- Endosulfan, 4,4 DDT, Endosulfan sulphate, Methoxychlor, and Endrin Ketone) in shrimp. The method was validated by evaluating the accuracy, precision, linearity, limit of detection (LOD) and limit of quantification (LOQ). The average recoveries of the selected pesticides ranged from 84% to 106% with RSDr ≤ 14% in four fortification levels of 0.05, 0.1, 0.2 and 0.3 mg kg-1. The linearity was ≥ 0.996 for all of the selected pesticides with matrix matched calibration standards. The LOD ranged from 0.003 to 0.009 mg kg-1 and the LOQ was 0.05 mg kg-1. This method was applied successfully for the residue analysis of 40 shrimp samples collected from different regions in Bangladesh.SAARC J. Agri., 16(1): 81-93 (2018)

scholarly journals Pesticidal residue analysis and phytochemical screening in leaves and roots of Barleria prionitis Linn.

2018 ◽  
Vol 8 (5) ◽  
pp. 455-459
Author(s):  
Reema Dheer ◽  
Surendra Swarnkar
Keyword(s):  
Gas Chromatography ◽  
Organochlorine Pesticides ◽  
Pesticide Residues ◽  
Capillary Column ◽  
Residue Analysis ◽  
Extraction Procedure ◽  
Water Soluble ◽  
Phytochemical Screening ◽  
Plant Materials ◽  
Leaves And Roots

In the present study emphasize on phytochemical screening in leaves and roots of Barleria prionitis Linn. The extract of plant materials total ash content, extractive value, water soluble ash, and loss on drying values were identified. Medicinal plant materials are liable to contain pesticide residues, which accumulate from agriculture practices, such as spraying, treatment of soils during cultivation and administration of fumigants during storage. It is therefore recommended that every sample of medicinal plants used for such type of studies should be analyzed for the pesticidal residues. Therefore in the present study parts of the herb used for their antidiabetic potential were analyzed for organochlorine pesticides, which are persistent and remain in the food chain for longer periods. The samples of leaf and root of Barleria prionitis were ground coarsely and then preceded for the extraction procedure. The sample of extracts were analysed for residues of organochlorine pesticides by Gas Chromatography (GC). Analysis were carried out on a Schimadzu Model 2010 Gas Chromatograph (GC) equipped with 63 NI electron capture detector (ECD) and a capillary column HP ultra 2. The instrument was supported by Lab Solution software. The pesticide residues detected in them in the GC were within the limits. For phytochemical screening, the ethanolic and hydroalcoholic extracts obtained were prepared and subjected to various qualitative tests in order to reveal the presence or absence of common phytopharmaceuticals by using standard tests. Keywords: Phytochemical screening, Pesticidal residues, Barleria prionitis Gas Chromatography, Ash value, extractive value.

scholarly journals Estimation of Measurement Uncertainty in Pesticide Residue Analysis

2001 ◽  
Vol 84 (5) ◽  
pp. 1569-1578 ◽  
Author(s):  
Lutz Alder ◽  
Wolfagang Korth ◽  
Alan L Patey ◽  
Henk A van der Schee ◽  
Siegmar Schoeneweiss
Keyword(s):  
Pesticide Residue ◽  
Pesticide Residues ◽  
Residue Analysis ◽  
Pesticide Residue Analysis ◽  
Proficiency Tests ◽  
Entire Concentration Range ◽  
Dependent Relationship ◽  
Relative Standard ◽  
Residue Concentration ◽  
Standard Deviations

Abstract Proficiency test results from 5 countries involving 61 separate interlaboratory proficiency tests for pesticide residues were examined in this study. A total of 24 different matrixes and 869 relative standard deviations of the mean (or median) pesticide residue concentration were statistically evaluated in relation to the Horwitz function. The aim was to determine whether or not the concentration-dependent relationship described by Horwitz would hold for the much narrower range of chemicals and concentrations covered in routine pesticide residue analysis. Although for fatty (animal-derived) matrixes the variability increased as the concentration decreased in line with the Horwitz equation, the between-laboratories relative standard deviations for nonfatty matrixes (fruit, vegetables, and grain) remained at 25% over the entire concentration range of 1 μg/kg to 10 mg/kg for the pesticides studied. Given these findings, the Horwitz equation remains valid for calculating uncertainties involving pesticide residues in fatty matrixes. However, for pesticide residue analyses involving nonfatty matrixes, a constant relative standard deviation of 25% is more appropriate for calculating uncertainties, particularly when a reported result is assessed against a regulatory limit.

Evaluation of an alternative fluorinated chitosan as a QuEChERS adsorbent for pesticide residue analysis in apple samples

2019 ◽  
Vol 11 (27) ◽  
pp. 3460-3466 ◽  
Author(s):  
Qilin Deng ◽  
Liping Sun ◽  
Tao Zhu
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Pesticide Residue ◽  
Pesticide Residues ◽  
High Performance ◽  
Residue Analysis ◽  
Pesticide Residue Analysis ◽  
Quechers Method

In this study, a new and green fluorinated chitosan (trifluoroethyl methacrylate-chitosan (TFEMA-CTS)) was synthesized, and the QuEChERS method was applied for the effective determination of four pesticide residues in apple samples by high performance liquid chromatography.

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