除草剂2-甲基-4-氯苯氧乙酸的离子色谱分离荧光检测

Separation and Determination of2-Methyl-4-chlorophenoxyacetic Acid by Ion Chromatography with Fluorescence Detection

介绍了离子色谱荧光检测除草剂2_甲基_4_氯苯氧乙酸 (简称2甲4氯 )的方法 ,2甲4氯溶液在流速为1.5mL·min -1,淋洗液为0.1mol·L -1Na2CO3-0.1mol·L -1NaHCO3 混合溶液 ,荧光检测器的激发波长为284.9nm ,发射波长为314.5nm的条件下 ,能得到较好的分离和检测 ;在该条件下 ,2甲4氯具有良好的线性关系和重复性 ,检出限为0.093mg·L -1,对土壤样品进行检测 ,回收率98 %～103 %。

Methyl-4-chlorophenoxyacetic acid(MCPA)was separated by ion chromatography with an eluent consisting of0.1mol·L -1 Na 2 CO 3 and0.1mol·L -1 NaHCO 3 at a flow rate of1.5mL·min -1 .Fluorescence detector was used for the measurement of MCPA at excitation and emission wavelength of284.9nm and314.5nm,respectively.The detection limit of MCPA is0.093mg·L -1 .Experimental results showthat the method has a good linear relationship and repeatability.The method was used to determine MPCA in soil samples with satisˉfactory results.