title: Determination of organic acid impurities in lactic acid obtained by fermentation of sugarcane juice.
abstract: Lactic acid produced by fermentation process mostly contains a number of aliphatic carboxylic acids as impurities. In this work, carboxylic acid impurities in lactic acid samples from a number of sources were determined at ppm levels. A simple HPLC method was developed that utilized a new generation polar embedded reverse phase, 20mM phosphate buffer at pH 2.20 (±0.05) and UV detection at 210 nm. The method enabled quantitative analysis of the above acids in lactic acid matrix. The experimental conditions for column temperature, mobile phase pH and flow rate were optimized. A detailed validation of the method was performed for linearity, precision, accuracy, selectivity, limit of detection (LOD), limit of quantitation (LOQ), ruggedness and repeatability and reproducibility (R&R).
authors: Chemical Engineering and Process Development Division, National Chemical Laboratory, Council of Scientific and Industrial Research (CSIR), Pune 411008, India. ms.qureshi@ncl.res.in
authors: Mohd Shadbar
authors: MS
authors: Qureshi
authors: Sunil S
authors: SS
authors: Bhongale
authors: Archana K
authors: AK
authors: Thorave
mesh_terms: D000704:Analysis of Variance; D002264:Carboxylic Acids / Q000032:analysis* / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D019344:Lactic Acid / Q000378:metabolism*; D057230:Limit of Detection; D016014:Linear Models; D015203:Reproducibility of Results; D031786:Saccharum / Q000378:metabolism*; D013696:Temperature
chemical_list: D002264:Carboxylic Acids; D019344:Lactic Acid