燃烧法测定保健品中蛋白质含量的不确定度评定

Uncertainty evaluation for determination of protein in health care products by combustion method

中文关键词:  燃烧法  保健品  蛋白质  不确定度

英文关键词:combustion method  health care products  protein  uncertainty

中文摘要:

      目的 评定燃烧法测定保健品中蛋白质含量的不确定度。方法 采用燃烧法测定保健食品中蛋白质含量, 依据实验方法建立数学模型, 并依据JJF 1059.1—2012《测量不确定度评定与表示》, 分析不确定度的来源, 计算扩展不确定度。结果 燃烧法测定某品牌保健品中蛋白质含量为(13.8±0.2) g/100 g, k=2。结论 不确定度的主要来源为重复性测定。实验中可通过增加平行测定的次数等来减小不确定度。

英文摘要:

      Objective To evaluate the uncertainty for determination of protein in health care products by combustion method. Methods The content of protein in health care products was determined by combustion method. A mathematical model was established based on the experiment method. According to JJF 1059.1—2012 Evaluation and expression of uncertainty in measurement, the sources of uncertainty were analyzed and the extended uncertainty was calculated. Results The content of protein in the brand health care product determined by combustion method was (13.8±0.2) g/100 g, k=2. Conclusion The main source of the uncertainty is repeatability measurement. In the experiment, the uncertainty can be reduced by increasing the number of parallel measurement.