Simultaneous Determination of Benzoic Acid, Benzaldehyde and Benzyl Alcohol by Derivative Ratio Spectrum-Multiwavelength Least Absolute Deviation Linear Regression Spectrophotometry

Derivative ratio spectrum method and multiwavelength linear regression spectrophotometry combined with least absolute deviation method were applied to the simultaneous determination of ternary mixture of Benzoic Acid, Benzaldehyde and Benzyl Alcohol .The relative standard deviation of four determination is 0.16%～4.35% for formulated samples. The recovery is in the rang of 91.43%～105.9%.