雾非雾
第1楼2011/09/14
CAS Number 139968-49-3
采用高效液相色谱法,以乙腈-磷酸溶液为流动相,使用以ZORBAX SB-C18、5 μm为填料的不锈钢柱和二极管阵列检测器,在285 nm波长下对氰氟虫腙原药进行分离和定量分析.结果表明:该分析方法的线性相关系数为0.9998,
http://scholar.ilib.cn/A-QCode~ny200907014.html
雾非雾
第2楼2011/09/14
Determination of metaflumizone residues in cabbage and soil using ultra-performance liquid chromatography/ESI-MS/MS
A simple confirmatory method for the determination of metaflumizone in cabbage tissues and soil samples using ultra-performance liquid chromatography-ESI/MS/MS is presented. Metaflumizone residues in cabbage and soils were extracted with acetonitrile and an aliquot was cleaned up with primary and secondary amine. Two precursor product ion transitions for metaflumizone were measured and evaluated to provide the maximum degree of confidence in results. Under ESI negative conditions, quantitation was achieved by monitoring the fragment m/z=302 and qualitative fragment m/z=116.5 while also collecting their parent ionm/z=505.5. Average recoveries for cabbage and soil at four different levels (0.01, 0.05, 1 and 5 mg/kg) ranged from 77.6 to 87.9% with RSD of 3.5–7.9% and RSDR of 4.5–7.1%. The coefficients of determination of R2⩾0.9991 were achieved for metaflumizone calibration curves from 0.01 to 5.0 μg/mL. The metaflumizone LODs in cabbage and soil were determined to be both 0.001 mg/kg with a LOQ of 0.004 mg/kg. This method was able to demonstrate quantitative recoveries and provide confirmatory data for the identification of metaflumizone residues in cabbage tissues and the surrounding soils following commercial application.
http://bbs.instrument.com.cn/shtml/20100413/2496468/ 1楼