The aim of the proficiency testing scheme was to evaluate the performance of the laboratories, analysing benzoate and sorbate in tomato ketchup. Proficiency testing performance of Turkish accredited laboratories between the years 20 was evaluated and reported herein. The uncertainty values of sodium benzoate and potassium sorbate were found as 0.199 and 0.150 mg/L by HPLC and 0.072 and 0.044 mg/L by LC-MS/MS, respectively. A correlation coefficient of 0.999 was achieved over the measured calibration range for both compounds and methods (HPLC and LC-MS/MS). Optimisation of the methods enabled the chromatographic separation of the analytes in less than 4 min. HPLC-UV and LC-MS/MS methods were compared for quantitative analyses of sodium benzoate and potassium sorbate in a representative ketchup sample. N2 - High Performance Liquid Chromatography LC-UV and LC-MS/MS methods were developed and validated for quantitative analyses of sodium benzoate and potassium sorbate in foods and beverages. T1 - HPLC and LC-MS/MS methods for determination of sodium benzoate and potassium sorbate in food and beverages: performances of local accredited laboratories via proficiency tests in Turkey. The aim of the proficiency testing scheme was to evaluate the performance of the laboratories, analysing benzoate and sorbate in tomato ketchup. Sodium benzoate has a molecular mass of 144.11 g mol-1, with a density of 1.44 g/cm3, with boiling points of 249.3 degrees Celsius, melting points of 410 degrees Celsius. A correlation coefficient of 0.999 was achieved over the measured calibration range for both compounds and methods (HPLC and LC-MS/MS). What mass of sodium benzoate should you add to 144.0 mLof a 0.13 MM benzoic acid (HC7H5O2) solution to obtain a buffer with a pH of 4.20 ( Ka (HC7H5O2)6.5×105 Express your answer in grams to two significant figures. Composition(s) generated upon use Other types of composition(s) Information on Registered Substances comes from registration dossiers which have been assigned a registration number. Since 1 one cubic centimeter sodium benzoate has a mass of 1,44 g, Y mL of sodium benzoate. Sodium benzoate EC Number: 208-534-8 EC Name: Sodium benzoate CAS Number: 532-32-1 Molecular formula: C7H6O2.Na IUPAC Name: sodium benzoate. HPLC-UV and LC-MS/MS methods were compared for quantitative analyses of sodium benzoate and potassium sorbate in a representative ketchup sample. so a volume of one cubic centimeter equals Y milliLitre. High Performance Liquid Chromatography LC-UV and LC-MS/MS methods were developed and validated for quantitative analyses of sodium benzoate and potassium sorbate in foods and beverages.
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