在钾长石分析中,经典的测定钾、钠的方法是重量法,但分析手续繁复,准确度也较差,而且使用的试剂价格昂贵,因此已很少采用。目前较常用的方法是火焰光度法,但某些共存元素直接干扰其测定,尽管可以通过分离或掩蔽等手段设法消除,但使分析手续变得冗长。此外,滤光片的质量和钾、钠的自吸现象都可使测定结果产生较大偏差。而用原子吸收分光光度法测定钾、钠,干扰因素少,所有在火焰光度法中可能产生的辐射干扰,在原子吸收法中几乎得到全部 In the K-feldspar analysis, the classical method for the determination of potassium and sodium is the gravimetric method, but the analysis procedure is complicated and the accuracy is poor. Moreover, the reagents used are expensive and therefore rarely used. At present, the most commonly used method is flame photometry, but some coexisting elements interfere directly with its determination. Although it can be eliminated by means of separation or masking, the analysis procedure becomes lengthy. In addition, the filter quality and potassium, sodium self-absorption phenomenon can make a large deviation in the measurement results. The atomic absorption spectrophotometric determination of potassium, sodium, interference factors, all in the flame photometric method may produce radiation interference, almost all in the atomic absorption method