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在分析化学中,如果遇到样品中除欲测定的某一元素或化合物外,尚有某些共存的离子或化合物时,则必须采用分离或掩蔽方法,以消除这些共存的干扰因素。在分析实践中,为了方便起见,一般常用掩蔽法消除干扰,因此,对掩蔽剂的掩蔽能力及其用量应予考虑研究,但实际上由于影响因素很多,对体系平衡的定量处理,目前仍甚困难,故掩蔽剂的使用在很大程度上是经验性的。在通常情况下,掩蔽剂的一般选择使用原则是:(1)掩蔽反应的速度应迅速及时;
In analytical chemistry, if there are some elements or compounds in the sample to be determined, there are some coexisting ions or compounds, you must use separation or masking methods to eliminate these coexisting interference factors. In the practice of analysis, for the sake of convenience, commonly used masking method to eliminate interference, therefore, masking agent masking ability and its dosage should be considered, but in fact due to many factors, the quantitative balance of the system is still very much Difficulties, so the use of masking agents is largely empirical. Under normal circumstances, the masking agent of the general choice of the use of principles are: (1) masking the reaction speed should be prompt and timely;