Uncertainty Evaluation for Determination of Amino Acid Nitrogen Content in Soy Sauce by Titration
Objective:To determine the content of amino acid nitrogen in soy sauce by titration and evaluate the uncertainty of the result.Method:According to the calculation formula of amino acid nitrogen and the factors affecting the uncertainty,a mathematical model was established to evaluate the uncertainty of amino acid nitrogen detection results in soy sauce.Result:When the amino acid nitrogen content of soy sauce sample was 0.80 g/100 mL,the uncertainty result was expressed as(0.80±0.02)g/100 mL(k=2).Conclusion:In the process of experiment,only standardized experimental operation,the use of calibrated measuring instruments and certified standard substances,increasing the detection frequency of parallel samples,etc.,can make the detection data more accurate,and thus ensure food safety.
万方数据
维普
