建立了测定甲基汞的荧光分析法 ,该方法是基于罗丹明B与甲基汞的碘络阴离子形成离子对化合物 ,然后用苯萃取 ;激发波长为 5 75nm ,发射波长为 5 90nm ;方法的线性范围为 4× 10 - 8～ 5× 10 - 7mol L ,相关系数为 0 .9979,检出限为 2 μg mL .该方法已用于人发中甲基汞的测定 ,回收率为 96 %～ 10 5 % ,相对标准偏差为 4.2 % . A fluorescence method for the determination of methylmercury was established based on the formation of ion-pair compounds of iodine-based anions of rhodamine B with methylmercury and then extracted with benzene; the excitation wavelength was 575 nm and the emission wavelength was 590 nm; The linear range was 4 × 10 -8 to 5 × 10 -7 mol L with a correlation coefficient of 0.9979 with a detection limit of 2 μg mL.This method has been applied to the determination of methylmercury in human hair with a recovery of 96% ~ 10 5%, the relative standard deviation of 4.2%.