L-半胱氨酸预还原-氢化物发生-原子荧光光谱法测定水中的锑

Determination of Antimony in Water by Hydride Generation-atomic Fluorescence Spectrometry with L-Cysteine as Pre-reduction Agent

在稀H：sO。介质中，以L-半胱氨酸作预还原剂，用氢化物发生-原子荧光光谱法测定水中的锑。L-半胱氨酸的存在，改善了氢化物发生条件和增敏光谱测定信号，当在低酸度下发生锑的氢化物时，过渡金属离子的干扰显著地得到了抑制，灵敏度提高，方法的检出限为0．13μg／L，回收率为92．5％～106．5％。

In the medium of dilute sulfuric acid, the antimony in drinking water can be measured by using L - cys-teine as pre - reduction agent with hydride generation - atomic fluorescence spectrometry. The existence of L - cys- teine improves the producing conditions of hydride and increases sensitivity optical spectrum measurement signal. When hydride of antimony occurs under lower acidity, the interference of transition metal ions is obviously suppressed and the sensitivity is increased. The detection limit is 0. 13ug/L and the rate of recovery is 92. 5% to 106. 5%.