摘要
低温冷冻萃取结合高效液相色谱法,测定乳味饮料中的苯磺隆、氟嘧磺隆、氟铃脲、氟苯脲、杀铃脲。反相C18柱分离,以V(甲醇)∶V(水)=73∶27为流动相,紫外可变波长检测。乙腈为萃取剂,-18℃冷冻萃取,考察了盐效应、冷冻时间、萃取剂与样品比例等条件对萃取结果的影响。优化条件下,5种农药的线性关系良好,相关系数大于0.999 4,相对标准偏差小于2.33%,加标回收率在92.3%~98.7%。
Subzero-temperature frozen extraction technique which using acetonitrile as a solvent was applied to the extraction of pesticide such as Tribenuron, Primisulfuron, Hexaflumuron, Teflubenzuron, Triflumuron from flavor- ed milk drinks. HPLC was used for the determination. The pesticide were separated by a reversed-phase C18 column and detected by Variable wavelength UV. The mobile phase was the mixture of methanol and water and the volume ratio was 73:27. Acetonitrile was used in extracting under 18 degrees below zero. Salt effect , frozen time and the volume ra- tio of extraction agent on the effect of extracting efficiency were studied. Under the optimal conditions, the linear regres- sion equations of five pesticide was good and the correlation coefficient was more than 0. 9994. The relative standard de- viations were less than 2. 333%. The recovery rates of the target analyte were between 92.3% and 98.7%.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2014年第10期210-212,共3页
Food and Fermentation Industries
关键词
低温萃取
液相色谱
除草剂
杀虫剂
乳味饮料
subzero-temperature extraction,liquid chromatography,herbicide,insecticide, flavored milk drinks