【摘要】 采用L-半胱氨酸为预还原剂,建立了断续流动进样氢化物发生-原子荧光光谱法同时测定纺织品中微量砷和锑的方法。并确定了仪器的最佳工作条件,考察了介质和载流酸度、硼氢化钠浓度、L-半胱氨酸浓度和载流流速的影响以及共存元素的干扰情况。方法简便、快速。在选定的测定条件下,砷和锑的检出限分别为0.35和0.22μg.L-1,相对标准偏差分别为1.3%和2.8%,回收率分别为93.6%~98.4%和92.2%~103.6%。更多还原

【Abstract】 A method for the simultaneous determination of trace arsenic and antimony in textile by intermittent flow-hydride generation-atomic fluorescence spectrometry with L-cysteine as a prereducer was developed.The optimal instrument condition was established.The influence factors such as the acidity of sample solution and carrier liquid,the concentrations of KBH₄ and L-cysteine,the flow rate of carrier,and the interference of coexistent elements were investigated.The method was convenient and rapid.Under the optimal condition,the detection limits were 0.35 and 0.22 μg·L^-1,the relative standard deviations were 1.3% and 2.8%,and the recoveries were in the ranges of 93.6%-98.4% and 92.2%-103.6% for As and Sb respectively.更多还原