Chemical vapor generation: atomic absorption by Ag, Au, Cu, and Zn following reduction of aquo ions with sodium tetrahydroborate(III)
Chemical vapor generation: atomic absorption by Ag, Au, Cu, and Zn following reduction of aquo ions with sodium tetrahydroborate(III)
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DOI：
10.1021/ac000221n
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发表时间：
2000-07
影响因子：
7.4
通讯作者：
Luna;Sturgeon;de Campos RC
中科院分区：
文献类型：
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作者：
Luna;Sturgeon;de Campos RC
通过向分析物的酸化溶液中添加四氢硼酸钠 (III)，在室温下产生 Ag、Au、Cu、Zn、Cd 和 As 的挥发性物质。气相物质被快速转移到加热石英管原子化器（QTA）中，通过原子吸收光谱法进行检测。使用单变量方法来实现优化条件并得出分析品质因数。分析物作为分子物质（可能作为金属氢化物）从溶液中释放出来，并在非优化条件下在 QTA 中（部分）雾化。检测限范围为 1.8 (Zn) 至 420 ng (Au)。 Au 的生成过程效率估计为 92 +/- 4%。通过使用尽可能最小长度的窄孔聚四氟乙烯传输线，可以最大程度地减少传输至 QTA 期间分析物的损失。
Volatile species of Ag, Au, Cu, Zn, Cd, and As were generated at room temperature by the addition of sodium tetrahydroborate(III) to an acidified solution of the analytes. The vapor-phase species were rapidly transported to a heated quartz tube atomizer (QTA) for detection by atomic absorption spectrometry. A univariate approach was used to achieve optimized conditions and derive analytical figures of merit. The analytes are released from solution as molecular species (likely as metal hydrides) and are (partially) atomized in the QTA under nonoptimized conditions. Detection limits range from 1.8 (Zn) to 420 ng (Au). The efficiency of the generation process is estimated to be 92 +/- 4% for Au. Loss of analyte during transport to the QTA was minimized through use of the minimum length of narrow-bore Teflon transfer line possible.