溴化十六烷基三甲铵增敏荧光法测定不同蔬菜中甲萘威  

Determination of Carbaryl in Different Vegetables by Cetyltrimethylammonium Bromide Sensitized Fluorescence Method

作　　者：张海容[1] 何艳 陈金娥[1] ZHANG Hairong;HE Yan;CHEN Jine(Department of Chemistry,Xinzhou Teachers College,Xinzhou 034000)

机构地区：[1]忻州师范学院化学系,山西忻州034000

出　　处：《分析科学学报》2020年第3期461-464,共4页Journal of Analytical Science

基　　金：山西省科技厅软科学研究计划(No.2017041015-2)。

摘　　要：利用荧光法探索不同介质以及pH条件、有序介质浓度对甲萘威荧光性质的影响。结果表明溴化十六烷基三甲铵(CTMAB)在碱性条件(pH=10.3)对甲萘威荧光增敏效果最好,在λex/λem=318/475 nm处有强的荧光峰,据此建立了一种用CTMAB增敏荧光法测定甲萘威含量的新方法,其线性范围为1.0×10-7~1.0×10-4 mol/L,检出限为1.0×10-8 mol/L。方法用于蔬菜豆角、西红柿、西葫芦、油菜、尖椒、黄瓜、芹菜、小白菜、圆白菜、青椒中甲萘威的测定,加标回收率在89.3%~106.0%范围。The effects of concentration of ordered medium and pH on the fluorescence properties of carbaryl in different media such as triton X-100,SDS, β-CD, CTMAB,water, methanol, ethanol and acetonitrile were explored by fluorometry. The results showed that CTMAB had the best sensitization effect on fluorescence of carbaryl in the 8 different media under alkaline conditions(at pH=10.3),with a strong peak at λex/λem =318/475 nm. A new method for the determination of carbaryl by CTMAB micellar enhanced fluorimetry was built. The linear range of 1.0×10-7 mol/L-1.0×10-4 mol/L with a detection limit of 1.0×10-8 mol/L was obtained. The method was applied to the determination of carbaryl in bean, tomato, squash, rapeseed, pepper, cucumber, celery, small cabbage, round cabbage, green pepper with the recoveries in the range of 89.3%-106.0%, and the results were satisfactory.

关 键 词：甲萘威 胶束增敏 溴化十六烷基三甲铵 荧光光度法 

分 类 号：O657.39[理学—分析化学]