卡尔曼滤波紫外光度法同时测定酱油、食醋中的山梨酸和苯甲酸

Simultaneous Determination of Sorbic Acid and Benzoic Acid in Soy and Vinegar by Kalman Filtering UV Spectrophotometry

在酸性条件下 ,采用乙酸乙酯萃取、Na2 HPO4溶液反萃取分离酱油、食醋中的山梨酸、苯甲酸 ,卡尔曼滤波法计算结果 ,并与比值导数波谱法进行比较。结果表明 ,卡尔曼滤波法较比值导数波谱法有较高的准确度和精密度 ,并能监测干扰物质存在与否。

The benzoic acid and sorbic acid were re extracted with Na 2HPO 4 solution from the acetic ether,with which the soy and vinegar were extracted in acid solution.The UV spectrum of the Na 2HPO 4 solution was calculated with kalman filter method.The results of benzoic acid and sorbic acid are better than those obtained by derivative ratio spectrum method.The kalman filter method has a higher reliability and accuracy,and can detect the interference in real samples.