HPLC Method Development for Simultaneous Estimation of Sodium Benzoate and Potassium Sorbate in Food Products
Keywords:
Sodium benzoate, Potassium sorbate, RP-HPLCAbstract
A Reverse Phase-High Performance Liquid Chromatography method has been developed and validated for estimation of Sodium benzoate and Potassium sorbate in food products. The RP-HPLC method for Sodium benzoate and Potassium sorbate was developed using Luna C18 column (150 mm × 4.6 mm, 5 mm) as stationary phase and Acetonitrile:Sodium acetate buffer pH 4.3 (20:80) as mobile phase at 1.0ml/min flow rate and detection was carried out at 235nm and the methods were validated in accordance with ICH guidelines. Sodium benzoate and Potassium sorbate have linearity in the concentration range of 1-30µg/ml in with correlation coefficient (r2= 0.999 & r2=0.999) respectively. Sodium benzoate and Potassium sorbate eluted at 4.9 and 6.9 min respectively. The values of LOD were 0.59 and 0.39 and LOQ were 1.8 and 1.1 for sodium nezoate and potassium sorbate respectively. Results of assay and validation study are satisfactory. So, the methods can be successfully applied for the routine analysis of Sodium benzoate and Potassium sorbate.
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