Zhou H, Xu S, Fang Z
Northeastern University, Box 332, Research Center for Analytical Sciences, 110006 Shenyang.
Guang Pu Xue Yu Guang Pu Fen Xi. 2000 Aug;20(4):525-8.
A method for the determination of copper by FI-VGAAS (flow injection vapor generation atomic absorption spectrometry) was developed. The sample solution containing trace amounts of o-phenanthroline and 0.1 mol.L-1 HNO3 was carried out by carrier of 0.1 mol.L-1 HNO3 and merged with sodium tetrahydroborate solution to produce the vapor species of copper, which got separation in gas-liquid separator and was detected in a quartz tube atomizer at 1000 degrees C. A detection limit of 1.8 micrograms.L-1 (3 sigma) of copper was obtained with a sampling frequency of 144/h using a sample volume of 500 microL. The precision RSD was 2.6% (n = 11) at the 100 micrograms.L-1 copper. The method was applied to the analysis of human hair and rice standard reference samples, the results were in good agreement with certified values.
建立了一种采用流动注射-蒸气发生原子吸收光谱法（FI-VGAAS）测定铜的方法。含有痕量邻菲啰啉和0.1 mol·L⁻¹硝酸的样品溶液由0.1 mol·L⁻¹硝酸作为载流进行输送，并与硼氢化钠溶液合并以产生铜的蒸气物种，该蒸气物种在气液分离器中分离，并在1000℃的石英管原子化器中进行检测。使用500 μL的样品体积，采样频率为144次/小时，获得了铜的检测限为1.8 μg·L⁻¹（3σ）。在100 μg·L⁻¹铜浓度下，精密度相对标准偏差（RSD）为2.6%（n = 11）。该方法应用于人发和大米标准参考样品的分析，结果与认定值吻合良好。
