The Experts below are selected from a list of 15060 Experts worldwide ranked by ideXlab platform
Greg Mercer - One of the best experts on this subject based on the ideXlab platform.
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado (Persea americana) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This met...
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado ( Persea americana ) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This method demonstrated the improved recovery of several challenging lipophilic pesticides in highly fat-rich Avocados.
Narong Chamkasem - One of the best experts on this subject based on the ideXlab platform.
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado (Persea americana) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This met...
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado ( Persea americana ) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This method demonstrated the improved recovery of several challenging lipophilic pesticides in highly fat-rich Avocados.
Lisa W Ollis - One of the best experts on this subject based on the ideXlab platform.
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado (Persea americana) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This met...
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado ( Persea americana ) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This method demonstrated the improved recovery of several challenging lipophilic pesticides in highly fat-rich Avocados.
Sookwang Lee - One of the best experts on this subject based on the ideXlab platform.
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado (Persea americana) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This met...
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado ( Persea americana ) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This method demonstrated the improved recovery of several challenging lipophilic pesticides in highly fat-rich Avocados.
Tiffany Harmon - One of the best experts on this subject based on the ideXlab platform.
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado (Persea americana) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This met...
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analysis of 136 pesticides in Avocado using a modified quechers method with lc ms ms and gc ms ms
Journal of Agricultural and Food Chemistry, 2013Co-Authors: Narong Chamkasem, Lisa W Ollis, Tiffany Harmon, Sookwang Lee, Greg MercerAbstract:A simple and high-throughput screening method for the analysis of 136 pesticides in Avocado ( Persea americana ) by LC-(+)-ESI-MS/MS and GC-MS/MS is presented. A modified QuEChERS sample preparation method was developed to improve the extraction recovery of highly lipophilic pesticides. Extracts from minced Avocados after acetonitrile (MeCN) extraction were directly injected to LC-MS/MS, whereas other GC-amenable compounds were treated with the modified QuEChERS procedure for GC-MS/MS analysis. The average recoveries for 79 pesticides quantified by LC-MS/MS at 10, 50, and 200 ng/g fortifying levels were 86.1% or better (with maximum RSD at 9.2%), whereas GC-MS/MS analysis demonstrated 70.2% or better (RSD < 18%) for average recovery from 57 compounds at the same spike levels. The application of LC- and GC-MS/MS combined with the improved extraction procedures led to the current method, which can quantitate these pesticides even if they are present in Avocados below the targeted action level by FDA. This method demonstrated the improved recovery of several challenging lipophilic pesticides in highly fat-rich Avocados.
