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本文提出了测定混合干扰组分改进的多波长Ｋ系数法。首先采用参比波长组及测量波长组，组中各波长以吸光度的和参与Ｋ系数和△Ａ的计算，以减少测量误差；其次Ｋ系数的测定在含有所有干扰组分的溶液中进行，以减少组分吸光度非严格１００％加和引起的误差，Ｋ系数的求解使用算术平均值法，而不用最小二乘法，以减少计算误差。依本法对双氯灭痛、朴尔敏、扑热息痛体系进行了测定，其准确度有明显提高，该法用于实际样品分析，结果满意。
In this paper, we propose an improved multi-wavelength K-factor method for measuring mixed interference components. Firstly, the reference wavelength group and the measurement wavelength group are used, and the sum of the absorbances of each wavelength in the group is involved in the calculation of the K coefficient and the △ A to reduce the measurement error. Secondly, the determination of the K coefficient is performed in a solution containing all interfering components Reduce the component absorbance is not strictly 100% plus the error caused by the use of the K-factor solution to calculate the arithmetic mean method, without the least squares method to reduce the calculation error. According to the law of diclofenac, Parker Min, paracetamol system was measured, the accuracy has improved significantly, the method for the actual sample analysis, the results are satisfactory.