液相色谱-电感耦合等离子体质谱法测定纺织品中有机汞

Determination of organic mercury in textiles by HPLC-ICP/MS

建立了液相色谱-电感耦合等离子体质谱法（HPLC—ICP／MS）测定纺织品中有机汞化合物的方法。采用C18反相色 谱柱，以0．12％的L-半胱氨酸缓冲盐水溶液和甲醇（v：V=92：8）作为流动相，进行等度洗脱，流速为1 ml/min。结 果显示，仪器在O．5-50μg／L线性范围内，甲基汞和乙基汞线性方程相关系数均大于0．9999，方法检出限为2μg／k；3种不同浓度的添加回收率在60％-95％，相对标准偏差（n=3）均小于7．1％。该方法简便、快速、准确，可用于测定纺 织品中的有机汞类化合物。

The method for determination of organic mercury in textiles by high performance liquid chromatography coupled withinductively coupled plasma-mass spectrometry （HPLC-ICP/MS） is established. C18 chromatographic column is used as stationary phase,and the mixture of 0.12% L-cysteine water and methanol in 92 ： 8 ratio with lmL/min is used as mobile phase in the gradient elution. Thecalibration curve of organic mercury is linear in the range of 0.5 - 50μg/L, and the correlation coefficient is 0.9999. The detection limit of themethod is 2μg/kg. The average recoveries of organic mercury are in the range of 60% - 95% with relative standard deviations （ n = 3） lessthan 7.1% in three levels respectively. The method is simple, convenient and accurate, and is suitable for determining the organic mercury intextiles.