Abstract A method for the determination of cadmium by pyrolysis chemical vapor generation (Py-CVG) atomic fluorescence spectrometry using titanium hydride (TiH2) as a reducing agent has been proposed. Under optimal conditions (T = 500 °C, TiH2 = 20 mg, argon = 350 ml min−1), the mass and concentration detection limits were 0.21 ng and 0.52 ng ml−1, respectively, and precision(RSD,%)for ten replicated measurements for a 5 ng cadmium was 5.2. The proposed method has not only a good interference tolerance but also a very stable signal plateau in a very wide range of acid concentrations. The method was successfully applied to analyze trace amounts of cadmium in two reference materials for environmental water, and the results were in good agreement with the certified reference values.

中文翻译：

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快速热解法测定水样中的镉——以氢化钛粉末为氢源的化学气相发生原子荧光光谱法

摘要 提出了一种以氢化钛 (TiH2) 为还原剂的热解化学气相发生 (Py-CVG) 原子荧光光谱法测定镉的方法。在最佳条件下（T = 500 °C，TiH2 = 20 mg，氩气 = 350 ml min-1），质量和浓度检出限分别为 0.21 ng 和 0.52 ng ml-1，精密度（RSD，%） 5 ng 镉的 10 次重复测量结果为 5.2。所提出的方法不仅具有良好的干扰耐受性，而且在很宽的酸浓度范围内具有非常稳定的信号平台。该方法成功应用于两种环境水标准物质中痕量镉的分析，结果与标准品标准值吻合良好。