Minimization of sample volume with air-segmented sample injection and the simultaneous determination of trace elements by ICP-MS. |
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Authors: | Osamu Noguchi Mitsuko Oshima Shoji Motomizu |
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Institution: | Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan. op-euaec907@pref.okayama.jp |
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Abstract: | The application of inductively coupled plasma mass spectrometry (ICP-MS) to forensic chemistry was studied. The developed method, air-segmented sample injection (ASSI) coupled with ICP-MS, allowed the determination of about 25 elements at the sub-ppb level with only 0.2 ml of a sample solution. The optimum sample flow rate was found to be 0.4 ml min(-1), along with a sample suction time of 30 s. The proposed method was validated by determining trace elements in river-water certified reference material (SLRS-4) issued by National Research Council Canada. The analytical results of the proposed method were in good agreement with the certified values. This method was successfully applied to a human hair sample, the volume of which was 3 ml. |
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