A New Validated Spectroscopic Method for the estimation of Sodium Benzoate in Soft drinks

One of the most compelling reasons for food analysis is to ensure that it is safe for both consumers and producers. Sodium benzoate is a popular food ingredient that can be found in a variety of foods and beverages. To measure sodium benzoate in the UV-region, a rapid and simple Spectrophotometric method was devised and validated according to International Conference on Harmonization (ICH Q2 R1) principles. Distilled water was used to make the standard and sample solutions. At 224nm, the maximum absorbance (λmax) was obtained. In the range of 1-40 µg/ml, the calibration curve was linear. The intra-day and inter-day percent RSDs were found to be 0.08 and 0.17, respectively. 0.031 and 0.093 were found to be the LOD and LOQ, respectively. The % RSD for robustness was found to be 0.86, while the % RSD for ruggedness was found to be 0.35. The proposed method was rapid, simple, precise and economic and can be adapted to routine quality control of beverages having Sodium benzoate.