我在故我思
第2楼2008/09/05
HPLC法检测灭蝇胺在黄瓜和土壤中的残留
建立了高效液相色谱测定灭蝇胺在黄瓜和土壤中残留的方法,灭蝇胺的最小检出量为4×10-10g.对黄瓜样品,在005—50mg·kg-1时,平均回收率为76.2—86.2%;变异系数为0.4—20%,最低检出浓度为002mg·kg-1.对土壤样品,在02—50mg·kg-1时,平均回收率为854—881%;变异系数为06—14%,最低检出浓度为002mg·kg-1.
HPLC法检测灭蝇胺在黄瓜和土壤中的残留
我在故我思
第3楼2009/01/31
High performance liquid chromatographic determination of cyromazine and its derivative melamine in poultry meats and eggs
Chou ShinShou, Hwang DengFwu, Lee HuiFang
Journal of Food and Drug Analysis
Abstract:
A high performance liquid chromatography (HPLC) with NH2 column and 75% acetonitrile eluate to determine the insecticide cyromazine residues in poultry meats and eggs was developed. Samples were treated with NaOH, extracted with acetonitrile containing 20% concentrated NH4OH, and cleaned up through C18 Sep-Pak cartridge. The peaks of cyromazine and its metabolite melamine were successfully separated within 12 min and cleanly differentiated from interfering peaks of the samples. The detection limit of both compounds was 0.02 ppm. Recoveries of cyromazine and melamine ranged from 92.8-97.3% and 91.0-96.1% at fortified levels of 0.2-0.7 ppm, respectively. Each reaction coefficient of linear standard curve of cyromazine and melamine was better than 0.999. Using this HPLC determination, only one beef sample from 46 tested samples was detected to contain 0.04 ppm cyromazine. This was further confirmed by gas chromatography-mass spectroscopy
http://www.cababstractsplus.org/abstracts/Abstract.aspx?AcNo=20043023516