电感耦合等离子体原子发射光谱法定量测试明胶中的微量元素Co和Bi——应用IEC模型校正Fe对Co的光谱干扰

应用电感耦合等离子体原子发射光谱法(ICP-AES)，建立了定量测试明胶中微量金属元素Co, Bi的方法。采用湿法消解对明胶样品进行了前处理, 对仪器的测试条件进行了优化。讨论了用ICP-AES同时测定明胶中Co和Bi时，应用光谱干扰系数校正法(IEC)模型校正了Fe在特定波长下对Co的光谱干扰。结果表明，Fe对Co的光谱干扰可以应用IEC模型进行有效的消除, 进行光谱校正后的结果明显优于未加校正的实验结果。建立的方法准确、快速、高效、线性范围宽。被测元素工作曲线的线性相关系数r≥0.999 90。结果的相对标准偏差RSD%≤2.00。加标回收率为98%～107%。

Quantitatively Determining Trace Elements Co and Bi in Gelatin by Inductively Coupled Plasma Atomic Emission Spectrometry Method--Applying IEC Model to Correct the Spectral Interference of Fe to Co

By ICP-AES, the authors established the method to quantitatively determine the trace elements Co and Bi in gelatin. The authors processed the unknown sample with wet digesting method. Trace elements in gelatin could be quantitatively determined at the same time. To correct the spectral interference of Fe to Co at specific wavelength, the Interelement Correction(IEC) model was established. The results of the experiment showed that the IEC model could effectively erase the spectral interference of Fe to Co. The result of the spectral correction was greatly superior to the result where the spectral interference weren't corrected by the IEC model. The method was accurate, quick with high performance and wide linear range. The linear correlation coefficient of the tested elements was over 0.999 90. The relative standard deviation (RSD%) was less than 2.00%. The recovery rates were in the range of 98%-107%.