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目的测定不同品种不同产区制天南星饮片的铝离子含量,建立制天南星中铝离子含量测定方法。方法制天南星饮片经灰化处理后,制备供试品溶液,与乙二胺四醋酸二钠溶液(0.05mol/L)络合反应,用锌滴定液(0.05mol/L)返滴,进行定量分析。结果方法学考察符合含量测定要求,加样回收率为96.79%,RSD为1.10%(n=6);重复性和稳定性试验RSD分别为0.08%、0.11%。结论该方法操作简单,精密度、重复性和稳定性良好,有助于制天南星药材中A l3+的质量控制。
Objective To determine the content of aluminum ions in different parts of the system, and to establish the determination method of aluminum ion content in the system. Methods After the preparation of Tiannanxing Pieces was treated by ashing, the test solution was prepared, complexed with ethylenediaminetetraacetic acid disodium solution (0.05mol/L), and titrated with zinc titrant (0.05mol/L). analysis. RESULTS: Methodological investigations met the content determination requirements. The recovery rate was 96.79%, RSD was 1.10% (n=6), and RSD of repeatability and stability tests were 0.08% and 0.11%, respectively. Conclusion The method is simple, with good precision, repeatability and stability, and it is helpful for the quality control of A l 3+ in the preparation of R. chinensis.