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提出了比值导数光谱多波长最小二乘回归分光光度法测定苯甲酸、苯甲醛和苯甲醇三组分混合物。合成试样４ 次平行测定的相对标准偏差为０ ．１６ ％ ～４．３５ ％ 。回收率在９１ ．４３ ％ ～１０５．９ ％ 之间。
Proportional derivative spectroscopy multiwavelength least squares regression spectrophotometry was developed for the determination of benzoic acid, benzaldehyde and benzyl alcohol mixture. The relative standard deviation of four parallel determinations of synthetic samples was zero. 16% ~ 4.35%. The recovery rate is 91. 43% to 105.9%.