Noguchi Osamu, Oshima Mitsuko, Motomizu Shoji
Graduate School of Natural Science and Technology, Okayama University, 3-1-1, Tsushimanaka, Okayama 700-8530, Japan; Criminal Investigation Laboratory, Okayama Prefectural Police H.Q., 1-3-2, Tonda, Okayama 700-0816, Japan.
Talanta. 2009 Jun 15;78(4-5):1235-9. doi: 10.1016/j.talanta.2009.01.050. Epub 2009 Feb 5.
The application of inductively coupled plasma atomic emission spectrometry (ICP-AES) to the forensic sample was studied. On-line collection/concentration method of the sample with chelating resin column (TE-05) and air-sandwiched method to isolate the analyte zone at the highest concentration of an eluent was coupled with ICP-AES. The limits of detection (LODs) were much improved to 35 fold (Co): from Sc, 0.15 ng ml(-1) to Ni, 1.99 ng ml(-1), and the concentration efficiency was 7-14 times. This method was applied to the concrete with about 10mg of samples. Major elements (Al, Fe, Mg) measured by conventional/ICP-AES and trace elements measured by this method, such as Cd, Co, Ni, and Pb were determined without matrices interference. Four concrete samples can be discriminated by comparing the content profiles of the trace elements and the major elements.
研究了电感耦合等离子体原子发射光谱法（ICP-AES）在法医样本中的应用。采用螯合树脂柱（TE-05）对样本进行在线采集/浓缩，并结合气夹法在洗脱液最高浓度处分离分析物区，与ICP-AES联用。检测限（LODs）大幅提高，达到35倍（钴）：从钪的0.15 ng ml⁻¹到镍的1.99 ng ml⁻¹，浓缩效率为7至14倍。该方法应用于约10mg样本的混凝土。通过常规/ICP-AES测定的主要元素（铝、铁、镁）以及用该方法测定的痕量元素，如镉、钴、镍和铅，均在无基质干扰的情况下得以测定。通过比较痕量元素和主要元素的含量分布，可以区分四个混凝土样本。
