scholarly journals Development of a Modified QuEChERS Procedure for the Isolation of Pesticide Residues from Textile Samples, Followed by GC–MS Determination

Separations ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 106
Author(s):  
Svetlana Hrouzková ◽  
Agneša Szarka
Keyword(s):  
Separation Efficiency ◽  
Gas Chromatography Mass Spectrometry ◽  
Sample Type ◽  
Cotton Production ◽  
Extraction Solvent ◽  
Minimal Sample ◽  
Modified Quechers ◽  
Accuracy And Precision ◽  
Multiresidue Determination

Due to the use of pesticides during cotton production and/or textile storage, it is necessary to assure textile and clothing safety in order to improve the protection of human health. In this work, an efficient method was established for a multiresidue determination of 33 pesticides covering several pesticide classes such as organochlorine, organophosphate, pyrethroides, triazines, etc., in textiles by modified QuEChERS and followed by gas chromatography–mass spectrometry. Optimal conditions were selected, including the amount of the sample, type of the extraction solvent and cleaning up sorbents, until the method was finally validated. Sufficient accuracy and precision were presented by the method using spiked samples between 10 and 250 μg/kg, while recoveries from 70 to 120% and an RSD < 20% for all the pesticides were obtained; the limits of quantification were below 5 μg/kg for all studied pesticides. The presented method showed high separation efficiency with minimal sample and sorbent consumption. The validated method was successfully applied to the analysis of real samples and proved to be applicable to routine analyses.

Determination of Imidacloprid, Acetamiprid, Thiabendazole and Carbendazim Residues in Edible Fungi by HPLC

2013 ◽  
Vol 781-784 ◽  
pp. 99-103 ◽  
Author(s):  
Ling Lin ◽  
Chun Liang Yang ◽  
Zheng Peng ◽  
Ming Yue Wang ◽  
Zong Qiang Zeng ◽  
...  
Keyword(s):  
Solid Phase ◽  
Residue Analysis ◽  
Correlation Coefficients ◽  
Edible Fungi ◽  
Extraction Solvent ◽  
Solid Phase Extraction Cartridge ◽  
Accuracy And Precision ◽  
Relative Standard ◽  
Straw Mushroom

A method was developed for simultaneous determination of imidacloprid,acetamiprid, thiabendazole and carbendazim in lentinus edodes, straw mushroom and oyster mushroom by HPLC. Acetonitrile was edded in the sample for extraction solvent, the sample was purified by NH2 solid phase extraction cartridge,then detected by HPLC.The results showed that a good linearity in the range of 0.05~5.0μg/mL with the linear correlation coefficients of 0.9991~0.9997, the detection limits of imidacloprid, acetamiprid, thiabendazole and carbendazim were respectively 0.002 mg/kg,0.005mg/kg, 0.003 mg/kg and 0.003 mg/kg.Tests for recovery were made by addition of four pesticidess standards at three different concentration levels (0.1, 0.5 and 1.0 mg/kg) to the blank sample.The mean recovery rates were 86.0%~105.0% , the relative standard deviations were less than 3.5%.The sensitivity, accuracy and precision of this method were able to meet the requirements for pesticide residue analysis.

Multiresidue Determination of Avermectins in Plant-Derived Food by UPLC-MS/MS

2012 ◽  
Vol 554-556 ◽  
pp. 1322-1326
Author(s):  
Yu Bing Zha ◽  
Chun Liang Yang ◽  
Ming Yue Wang ◽  
Yong Zhou Wang ◽  
Cheng Yu Luo ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Performance ◽  
Residue Analysis ◽  
Food Plant ◽  
Tandem Mass ◽  
Pesticide Residue Analysis ◽  
Accuracy And Precision ◽  
Multiresidue Determination ◽  
Concentration Levels

The objective of this study was to propose a method that the residues of avermectins (Abamectin, Emamectin Benzoate, Ivermectin, Eprinomectin and Doramectin) derived from the food plant were determined by UPLC-MS/MS. The avermectins were extracted with acetonitrile, purified by Alumina B or GCB/NH2 SPE cartridge, and then determined by ultra high-performance liquid chromatography with tandem mass spectrometry. Tests for recovery (Recovery rate: 80.6%～99.8%, RSD's: 0.22%～6.4%) were made by addition of avermectin standards at three different concentration levels (4, 20 and 100μg/kg) to five kinds of food plant as matrixes. The sensitivity, accuracy and precision of this method were able to meet the requirements for pesticide residue analysis.

Development and Single-Laboratory Validation of an Improved Method for the Determination of Cyclamate in Foods Using Liquid Chromatography/Tandem Mass Spectrometry

2014 ◽  
Vol 97 (6) ◽  
pp. 1651-1655 ◽  
Author(s):  
Romina Shah ◽  
Lowri S De Jager ◽  
Timothy H Begley
Keyword(s):  
Internal Standard ◽  
Pomegranate Juice ◽  
Spectral Determination ◽  
Precision Data ◽  
Mass Spectral ◽  
Minimal Sample ◽  
Accuracy And Precision ◽  
Liquid Chromatography Tandem Mass ◽  
Potential Matrix

Abstract A fast and reliable LC-MS/MS method for the determination of cyclamate in a variety of food matrices was developed and validated. This method provides both quantitation and qualitative mass spectral determination important for analysis of regulatory samples. Utilization of a cyclamate-d11 internal standard corrects for potential matrix interferences during sample injection and allows minimal sample preparation. Seventeen commercially available food products were fortified at 250 μg/mL and tested as part of the method validation. Recoveries ranged from 72 to 110%, with RSDs ranging from 3 to 15%. The linear range spanned 0.010–1.00 μg/mL. LODs were 0.1 and 0.6 ng/mL, determined in pomegranate juice and dried fig, respectively. LOQs were 0.3 and 1.6 ng/mL, which are significantly lower than needed to measure cyclamate when used as a food additive. The interday and intraday accuracy and precision data are presented. This method was validated for analysis of a variety of commonly adulterated products, including drinks, dried fruits, jams, and hard candies.

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