Li X J, Schramel P, Wang H Z, Grill P, Kettrup A
Chemistry Department, Central Iron and Steel Research Institute, No. 76 Xueyuan Nanlu, 100081, Beijing, Haidian District, People's Republic of China.
Anal Bioanal Chem. 1996 Aug;356(1):52-6. doi: 10.1007/s0021663560052.
A combination of DAM-SCN(-) third phase extraction and inductively coupled plasma emission spectrometry (ICP-AES) is used for the determination of trace metal ions in a river water and a seawater reference material. An implementation of the third phase extraction prior to ICP-AES allows a preconcentration of trace elements (Co, Cu, Mn, Fe, V, Ti, Mn) by a factor ranging from 33 to 45. A complete separation of these elements is accomplished from matrices, normally affecting the excitation characteristics of ICP and suppressing the elemental signals severely. Different factors, including pH of the solutions, amounts of reagents, matrix effects, have been investigated and optimized. Under the conditions selected, the limits of determination have been in the range of 0.02 to 0.6 microg/L. The system has been successfully applied to the determination of Cu, Mn, V in the reference river water SLRS-3 and Mo in the reference seawater NASS-3. The results were in a good agreement with the certified values.
采用DAM-SCN(-) 第三相萃取与电感耦合等离子体发射光谱法（ICP-AES）相结合的方法，用于测定河水和海水标准物质中的痕量金属离子。在ICP-AES之前进行第三相萃取，可使痕量元素（钴、铜、锰、铁、钒、钛、锰）预富集33至45倍。这些元素可与通常会影响ICP激发特性并严重抑制元素信号的基体完全分离。对包括溶液pH值、试剂用量、基体效应在内的不同因素进行了研究和优化。在选定的条件下，测定限在0.02至0.6 μg/L范围内。该系统已成功应用于测定标准河水SLRS-3中的铜、锰、钒以及标准海水NASS-3中的钼。结果与认定值吻合良好。
