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应用卡尔曼滤波及P-矩阵分光光度法同时测定复方苯妥英钠片中利眠宁、苯巴比妥及苯妥英钠的含量。在卡尔曼滤波法的计算中,引入带非线性校正项的最小二乘法以减少实测数据对模型的偏差:在P-矩阵法处理过程中,以“条件数”作为选择测定波长的指标以减少计算误差,两种方法测定三组分的回收率分别为98.03%;CV=2.2%;98.99%;CV=2.1%;100.3%;CV=1.1%及100.6%;CV=2.1%;101.2%;CV=1.3%;99.97%。CV=1.3%(n均为23)。
Simultaneous Determination of Limaning, Phenobarbital and Phenytoin in Compound Phenytoin Sodium Tablets by Kalman Filter and P Matrix Spectrophotometry. In the calculation of Kalman filter method, the least square method with nonlinear correction term is introduced to reduce the deviation of the measured data to the model. In the process of P-matrix method, the “condition number” is used as an index to select the wavelength to reduce The calculated errors were 98.03% for the three components measured by the two methods respectively; CV = 2.2%; 98.99%; CV = 2.1%; 100.3%; CV = 1.1% and 100.6%; CV = 2.1%; 101.2% CV = 1.3%; 99.97%. CV = 1.3% (n is 23).