低温冷冻萃取-色谱法测定芝麻糊中苯脲除草剂  

Determination of phenylurea herbicides in sesame paste by HPLC with subzero-temperature frozen extraction

作　　者：李向梅[1] 周建科[1] 付艳芳[1] 

机构地区：[1]河北大学理化分析中心,河北省分析科学技术重点实验室,河北保定071002

出　　处：《化学研究与应用》2014年第1期145-148,共4页Chemical Research and Application

摘　　要：低温冷冻萃取,结合高效液相色谱法,测定芝麻糊中的甲氧隆、灭草隆、绿谷隆、溴谷隆、敌草隆、利谷隆和枯草隆。乙腈为萃取剂,考察了盐效应、冷冻时间、萃取剂用量等条件对萃取结果的影响。优化条件下,7种除草剂的加标回收率分别为92．4%、106．3%、106．4%、95．2%、96．9%、94．4%、90．6%,相对标准偏差（ RS-Ds）2．8%-7．4%。A new HPLC method for the simultaneous determination of 7 kinds of phenylurea herbicides（ metoxuron,monuron,monol-inuron,metobromuron,diuron,linuron and chloroxuron） was established. The sesame paste sample was treated by subzero-tempera-ture frozen extraction and acetonitrile as a solvent. The effects of salt effect,frozen time and extraction solvent volume were examined on extraction efficiency. Under the optimal conditions,the recovery rates of the target analyte were between 90. 6% -106. 4%and the relative standard deviations（ RSDs） were less than 7. 4%.

关 键 词：低温冷冻萃取 液相色谱 苯脲除草剂 

分 类 号：O657.7[理学—分析化学]