Chemical vapour generation of transition metal volatile species for analytical purposes: determination of Zn by inductively coupled plasma-optical emission spectrometry.
Chemical vapour generation of transition metal volatile species for analytical purposes: determination of Zn by inductively coupled plasma-optical emission spectrometry.
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DOI：
10.1039/b212844f
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
P. Smichowski;S. Farías;Sebastián Pérez Arisnabarreta
中科院分区：
文献类型：
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作者：
P. Smichowski;S. Farías;Sebastián Pérez Arisnabarreta
挥发性物种的锌产生合并酸化的水溶液样品和四氢硼酸钠（III）溶液中的连续流动系统。气态分析物随后经由Ar载体流引入等离子体炬的入口管中。采用电感耦合等离子体发射光谱法（ICP-OES）进行检测。的操作条件（化学和物理参数）和不同的无机（盐酸，硝酸）和有机酸（乙酸，柠檬酸，草酸，酒石酸）的浓度进行了评估，有效地产生锌蒸气。达到4.6 ng mL（-1）的检测限（3 sigma（空白））。在250 ng/mL（-1）和1000 ng/mL（-1）水平下测定的精密度（RSD）分别为6.9%和4.7%（n = 10）。据估计，在HCl中，生成过程的效率接近50%。研究了过渡金属（Cd、Co、Cu、Cr、Fe、Mn、Ni）、氢化物形成元素（As、Ge、Pb、Sb、Se）和Hg对Zn信号的可能干扰作用。该方法通过测定有证参考物质（CRM），NIST 1643 d水中微量元素中的锌进行了验证。
Volatile species of Zn were generated by merging acidified aqueous samples and sodium tetrahydroborate(III) solution in a continuous flow system. The gaseous analyte was subsequently introduced via a stream of Ar carrier into the inlet tube of the plasma torch. Inductively coupled plasma optical emission spectrometry (ICP-OES) was used for detection. The operating conditions (chemical and physical parameters) and the concentrations of different inorganic (hydrochloric, nitric) and organic acids (acetic, citric, oxalic, tartaric) were evaluated for the efficient generation of Zn vapour. A detection limit (3sigma(blank)) of 4.6 ng mL(-1) was achieved. The precision (RSD) of the determination was 6.9% at a level of 250 ng mL(-1) and 4.7% for 1000 ng mL(-1) (n = 10). The efficiency of the generation process was estimated to be close to 50% in HCl. The possible interferent effect of transition metals (Cd, Co, Cu, Cr, Fe, Mn, Ni), hydride forming elements (As, Ge, Pb, Sb, Se) and Hg on Zn signal was examined. The method was validated by the determination of Zn in a certified reference material (CRM), NIST 1643d trace elements in water.