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《Analytical letters》2012,45(6):1021-1035
A SPME-GC-MS/MS method for the determination of eight organophosphorus pesticides (azinphos-methyl, chlorpyriphos, chlorpyriphos-methyl, diazinon, fenitrothion, fenthion, malathion, and methidathion) in still and fortified wine was developed. The extraction procedure is simple, solvent free, and without any sample pretreatment. Limits of detection (LOD) and quantitation (LOQ) values in the range 0.1–14.3 µg/L and 0.2–43.3 µg/L, respectively, were obtained. The LOQ values are below the maximum residue levels (MRLs) established by European Regulation for grapes, with the exception of methidathion. Coefficients of correlation (R2) higher than 0.99 were obtained for the majority of the pesticides, in all different wines analyzed. 相似文献
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多功能汽液平衡测定仪的研究 总被引:1,自引:0,他引:1
研制了一种多功能液平衡测定仪--CS-Ⅱ型VLE测定仪,阐述了该仪器的设计思想,该仪器兼有沸点仪和平衡釜的特点和功能,作为沸点仪,它具有泵结构搅拌器,可适用于拟静态法;作为平衡釜,它具有新型的汽液相取样结构和液相区冷却功能,可适用于安全互溶体系、部分互溶体系和高沸点差体系VLE的测定,本文给出了有关详细的实验考核结果。 相似文献
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Diastereoselective first total synthesis of parvistone C 1 and C8-epimer 1a are described. The key features of our synthesis include Sharpless asymmetric dihydroxylation, stereoselective aryl Grignard reactions, Still–Gennari olefination, and intramolecular cyclization. 相似文献
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