際際滷shows by User: MargaritaDima / http://www.slideshare.net/images/logo.gif 際際滷shows by User: MargaritaDima / Fri, 15 May 2015 15:14:19 GMT 際際滷Share feed for 際際滷shows by User: MargaritaDima 凌隆旅凌旅亮 凌了竜旅亮亮略僚 僚 凌凌留竜旅虜ﾎ 凌僚僚 竜 留粒凌旅虜略 凌僚留 亮竜 凌了-凌了竜旅亮亮留旅虜劉 亮竜慮隆凌 虜留旅 侶僚 竜僚旅虜流 HRMS /slideshow/ppt2-48195447/48195447 ppt2-150515151419-lva1-app6891
A trend in the field of pesticide residue analysis is the implementation of easy, robust, cheap and multiresidue analytical methods. The recent advances of analytical instrumentation, offers new tools for the reliable and more accurate determination of unknown analytes in a variety of complex matrices like fruits and vegetables. Under the current work a multiresidue analytical method, based on the extraction method QuEChERS, a short extraction procedure without complex equipment, low consumption of consumables and appropriate isolation of pesticide residues of different chemical classes was developed and validated. The identification and quantification of the analytes was performed using liquid chromatography coupled with mass spectrometry time of flight (LC-TOF), a relatively new technique in the field of pesticide residue, mostly applied for a screening method. The method was successfully validated in three matrices (cauliflower, mandarin and peach), representative commodities of the group of plant commodities with high water and high acid content, for 163 analytes of different chemical groups. Accuracy, precision, linearity and matrix effect were investigated. The majority of analysts showed acceptable linearity with r 0,99, accuracy with 70-120% recovery rates and precision with SDR 20%. The limit of quantification was set at 0.01 mg / kg. Thus the method was found suitable for the determination of multiclass pesticide residues in cauliflower, peach and mandarins.]]>
A trend in the field of pesticide residue analysis is the implementation of easy, robust, cheap and multiresidue analytical methods. The recent advances of analytical instrumentation, offers new tools for the reliable and more accurate determination of unknown analytes in a variety of complex matrices like fruits and vegetables. Under the current work a multiresidue analytical method, based on the extraction method QuEChERS, a short extraction procedure without complex equipment, low consumption of consumables and appropriate isolation of pesticide residues of different chemical classes was developed and validated. The identification and quantification of the analytes was performed using liquid chromatography coupled with mass spectrometry time of flight (LC-TOF), a relatively new technique in the field of pesticide residue, mostly applied for a screening method. The method was successfully validated in three matrices (cauliflower, mandarin and peach), representative commodities of the group of plant commodities with high water and high acid content, for 163 analytes of different chemical groups. Accuracy, precision, linearity and matrix effect were investigated. The majority of analysts showed acceptable linearity with r 0,99, accuracy with 70-120% recovery rates and precision with SDR 20%. The limit of quantification was set at 0.01 mg / kg. Thus the method was found suitable for the determination of multiclass pesticide residues in cauliflower, peach and mandarins.]]> Fri, 15 May 2015 15:14:19 GMT /slideshow/ppt2-48195447/48195447 MargaritaDima@slideshare.net(MargaritaDima) 凌隆旅凌旅亮 凌了竜旅亮亮略僚 僚 凌凌留竜旅虜ﾎ 凌僚僚 竜 留粒凌旅虜略 凌僚留 亮竜 凌了-凌了竜旅亮亮留旅虜劉 亮竜慮隆凌 虜留旅 侶僚 竜僚旅虜流 HRMS MargaritaDima A trend in the field of pesticide residue analysis is the implementation of easy, robust, cheap and multiresidue analytical methods. The recent advances of analytical instrumentation, offers new tools for the reliable and more accurate determination of unknown analytes in a variety of complex matrices like fruits and vegetables. Under the current work a multiresidue analytical method, based on the extraction method QuEChERS, a short extraction procedure without complex equipment, low consumption of consumables and appropriate isolation of pesticide residues of different chemical classes was developed and validated. The identification and quantification of the analytes was performed using liquid chromatography coupled with mass spectrometry time of flight (LC-TOF), a relatively new technique in the field of pesticide residue, mostly applied for a screening method. The method was successfully validated in three matrices (cauliflower, mandarin and peach), representative commodities of the group of plant commodities with high water and high acid content, for 163 analytes of different chemical groups. Accuracy, precision, linearity and matrix effect were investigated. The majority of analysts showed acceptable linearity with r 0,99, accuracy with 70-120% recovery rates and precision with SDR 20%. The limit of quantification was set at 0.01 mg / kg. Thus the method was found suitable for the determination of multiclass pesticide residues in cauliflower, peach and mandarins. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/ppt2-150515151419-lva1-app6891-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> A trend in the field of pesticide residue analysis is the implementation of easy, robust, cheap and multiresidue analytical methods. The recent advances of analytical instrumentation, offers new tools for the reliable and more accurate determination of unknown analytes in a variety of complex matrices like fruits and vegetables. Under the current work a multiresidue analytical method, based on the extraction method QuEChERS, a short extraction procedure without complex equipment, low consumption of consumables and appropriate isolation of pesticide residues of different chemical classes was developed and validated. The identification and quantification of the analytes was performed using liquid chromatography coupled with mass spectrometry time of flight (LC-TOF), a relatively new technique in the field of pesticide residue, mostly applied for a screening method. The method was successfully validated in three matrices (cauliflower, mandarin and peach), representative commodities of the group of plant commodities with high water and high acid content, for 163 analytes of different chemical groups. Accuracy, precision, linearity and matrix effect were investigated. The majority of analysts showed acceptable linearity with r 0,99, accuracy with 70-120% recovery rates and precision with SDR 20%. The limit of quantification was set at 0.01 mg / kg. Thus the method was found suitable for the determination of multiclass pesticide residues in cauliflower, peach and mandarins.
凌隆旅凌旅亮 凌了竜旅亮亮略僚 僚 凌凌留竜旅虜ﾎ 凌僚僚 竜 留粒凌旅虜略 凌僚留 亮竜 凌了-凌了竜旅亮亮留旅虜劉 亮竜慮隆凌 虜留旅 侶僚 竜僚旅虜流 HRMS from Margarita Dima
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