Determination of triazines residues in fruits and vegetables: Methods comparison of ultrasonic solvent extraction with and without solid phase clean-up

2022 ◽  
pp. 1-9
Author(s):  
Hopewell Mnyandu ◽  
Precious Mahlambi
Keyword(s):  
Solvent Extraction ◽  
Fruits And Vegetables ◽  
Solid Phase ◽  
Methods Comparison

scholarly journals Multiresidue Determination of Organophosphorus Pesticides in Ginkgo Leaves by Accelerated Solvent Extraction and Gas Chromatography with Flame Photometric Detection

2005 ◽  
Vol 88 (3) ◽  
pp. 729-735
Author(s):  
Xionghai Yi ◽  
Yitong Lu
Keyword(s):  
Gas Chromatography ◽  
Solvent Extraction ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Accelerated Solvent Extraction ◽  
Simple Method ◽  
Photometric Detection ◽  
Relative Standard ◽  
Flame Photometric Detection

Abstract A rapid and simple method using accelerated solvent extraction and solid-phase extraction cleanup was developed and validated for the determination of 15 organophosphorus pesticides in ginkgo leaves by capillary gas chromatography with flame photometric detection. The pesticides were extracted at 100°C under 1500 psi pressure in <20 min. The average recovery from 10 g ginkgo leaves, fortified at 3 levels ranging from 0.05 to 1.00 mg/kg, was 95.2% with a relative standard deviation of 4.6%. The limits of detection ranged from 1.11 × 10−3 mg/kg (dimethoate) to 4.44 × 10−3 mg/kg (dichlorvos). The proposed method showed acceptable accuracy and precision while minimizing environmental concerns, time, and labor. Furthermore, the method could be easily applied to the monitoring of these 15 organophosphorus pesticides in ginkgo leaves.

scholarly journals Headspace Solid Phase Microextraction Application for Pesticide Residues in Fruits and Vegetables

2016 ◽  
Vol 2 (2) ◽  
Author(s):  
Abookleesh L Frage , Almrhag M. Omar , Zatout M. Massoud
Keyword(s):  
Sample Preparation ◽  
Solid Phase Microextraction ◽  
Fruits And Vegetables ◽  
High Efficiency ◽  
Solid Phase ◽  
Accurate Determination ◽  
Chemical Properties ◽  
Extraction Process ◽  
Headspace Solid Phase Microextraction

Headspace solid phase microextraction, fundamental& principle with its application on the determination of various pesticides are reviewed in this article. Pesticides extraction as a sample preparation step prior to subsequent analysis is aimed to achieve a reliable and accurate determination of this contaminants residue in food. Fast and high efficiency extraction process with free solvent consumption and overall cost is achieved through headspace solid phase micro extraction. HSPME is an equilibrium process which depends on the physio-chemical properties of the analyte to be extracted. Sample preparation and extraction condition such as fiber coating, temperature, time etc, have a direct impact on the extraction efficiency and sensitivity of headspace technique.

scholarly journals Multiresidue Method for the Determination of Residues of 251 Pesticides in Fruits and Vegetables by Gas Chromatography/Mass Spectrometry and Liquid Chromatography with Fluorescence Detection

2000 ◽  
Vol 83 (3) ◽  
pp. 698-713 ◽  
Author(s):  
Julie Fillion ◽  
François Sauvé ◽  
Jennifer Selwyn
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Fluorescence Detection ◽  
Fruits And Vegetables ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Selected Ion Monitoring ◽  
Detection Range

Abstract A method is described for the determination of 251 pesticide and degradation product residues in fruit and vegetable samples. Extraction of the sample with acetonitrile is followed by a saltingout step. Co-extractives are removed by passing a portion of the acetonitrile extract through an octadecyl (C18) solid-phase extraction cleanup cartridge and then, in a second cleanup, through a carbon cartridge coupled to an amino propyl cartridge. Determination is by gas chromatography with mass-selective detection in the selected-ion monitoring mode, and by liquid chromatography with post-column reaction and fluorescence detection for N-methyl carbamates. The method has been used for analysis of various fruits and vegetables, such as apple, banana, cabbage, carrot, cucumber, lettuce, orange, pear, pepper, and pineapple. Limits of detection range between 0.02 and 1.0 mg/kg for most compounds. Over 80% of the compounds have a limit of detection of ≤0.04 mg/kg.

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