Wang Ying-feng, Liu Cui-mei, Liu Shao-qing, Shi Yan-zhi, Chen Yu-hong
The Analysis Test Center, Capital Normal University, Beijing 100048, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2008 Sep;28(9):2173-6.
The Se in the blood and tissue of animal samples was determined by ICP-MS instrument. The method was not only proved simple and rapid, but also showed satisfying precision and low detection limit. The optimum conditions of ICP-MS for the method were investigated. Results by the digestion method, the isotopes selection, and the difference between the normal ICP-MS without ORS (Octopole Reaction System) and the ICP-MS with ORS were compared, which afford reference to the determination of the same kinds of sample. The standard materials were determined to proved the reliability of the normal ICP-MS and the ORS-ICP-MS methods. The ORS-ICP-MS can effectively remove the interference based on polyatomic ions, so the the detection limits were lowed, and the accuracy was improved. The detection limits of the method for normal ICP-MS is 0.024 ng x g(-1) and that for ORS-ICP-MS is 0.004 6 ng x g(-1), the RSDs are between 1.8% and 5.5%, and the recoveries of the method are in the range of 90.8%-107.2%.
采用电感耦合等离子体质谱仪（ICP-MS）测定动物样本血液和组织中的硒。该方法不仅简便快速，而且精密度良好，检出限低。研究了该方法在ICP-MS下的最佳条件。通过比较消解方法、同位素选择以及普通无八极杆反应系统（ORS）的ICP-MS与带ORS的ICP-MS之间的差异，为同类样品的测定提供参考。通过测定标准物质验证了普通ICP-MS和ORS-ICP-MS方法的可靠性。ORS-ICP-MS能有效消除基于多原子离子的干扰，从而降低检出限并提高准确度。该方法普通ICP-MS的检出限为0.024 ng·g⁻¹，ORS-ICP-MS的检出限为0.004 6 ng·g⁻¹，相对标准偏差在1.8%至5.5%之间，方法回收率在90.8% - 107.2%范围内。
