原子吸收分光光度计测定槟榔中钙元素含量的不确定度评定
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摘要
为提高测量结果的准确度,依据JJF 1059.1—2012《测量不确定度的评定与表示》,对原子吸收分光光度计测定槟榔中Ca元素含量的不确定度进行评价,建立了槟榔中钙元素含量测定的数学模型,并对其不确定度来源进行分析和量化,最终计算出合成不确定度及扩展不确定度。结果表明,标准曲线拟合及原子吸收分光光度计引入的不确定度影响较大,当槟榔中Ca元素的含量为3.16mg/kg时其扩展不确定为0.04mg/kg(k=2,置信区间95%)。
In order to improve the accuracy in measurement,the uncertainty of determination of Ca in Areca by atomic absorption spectrophotometer(AAS) was evaluated according to "JJF1059.1—2012 Evaluation and Expression of Uncertainty in Measurement".First,a mathematical model of determination of Ca in Areca was established at first.Then,the source of uncertainty was analyzed and the uncertainty components were quantified.Finally,the synthetic uncertainty and expanded uncertainty were calculated.The uncertainties of standard curve fitting and AAS had a greater influence on the expanded uncertainty.When the content of Ca in Areca was 3.16 mg/kg,the expanded uncertainty was 0.04 mg/kg(k=2,P=95%).
In order to improve the accuracy in measurement,the uncertainty of determination of Ca in Areca by atomic absorption spectrophotometer(AAS) was evaluated according to "JJF1059.1—2012 Evaluation and Expression of Uncertainty in Measurement".First,a mathematical model of determination of Ca in Areca was established at first.Then,the source of uncertainty was analyzed and the uncertainty components were quantified.Finally,the synthetic uncertainty and expanded uncertainty were calculated.The uncertainties of standard curve fitting and AAS had a greater influence on the expanded uncertainty.When the content of Ca in Areca was 3.16 mg/kg,the expanded uncertainty was 0.04 mg/kg(k=2,P=95%).
引文
[1]叶强,葛毅强.钙作用机理及钙制剂的研究[J].食品研究与开发,1998,19(1):26-29.
[2]卓丽玲,刘宗平.钙对成骨细胞活性、[Ca2+]i及GJIC的影响[J].中国兽医学报,2011,31(9):1 343-1 347.
[3]丰美福,史玉玲,王又明,等.巨噬细胞激活及钙作用的初步研究[J].生物物理学报,1993,9(2):226-233.
[4]李俊平,郭丽丽,陈中,等.钙超载与心肌缺血再灌注损伤及中药干预策略[J].中国中药杂志,2016,41(11):2 168-2 173.
[5]邓华,杨义,陆丽兰,等.结石类型与年龄、性别的相关性研究[J].临床泌尿外科杂志,2018,33(12):968-971.
[6]杨连珍,刘小香,李增平.世界槟榔生产现状及生产技术研究[J].世界农业,2018,7(471):121-128.
[7]王斌,杨大伟,匡理.槟榔生理活性及危害控制研究进展[J].食品研究与开发,2018,39(10):219-224.
[8]CHU Nai-shin.Effects of Betel chewing on the central and autonomic nervous systems[J].Journal of Biomedical Science,2001,8(3):229-236.
[9]CHU Nai-shin.Neurological aspects of areca and betel chewing[J].Addiction Biology,2002,7(1):111-114.
[10]梁艺馨,刘康书,蔡秋,等.连续光源火焰原子吸收法同时测定薏苡中铜、铁、钙和锰的不确定度评价[J].食品科学,2016,37(12):134-138.
[11]胡利敏,苏运聪,李飞,等.原子吸收火焰法测定婴幼儿奶粉中钙质量分数的不确定度评估[J].中国乳品工业,2018,46(8):48-50.
[2]卓丽玲,刘宗平.钙对成骨细胞活性、[Ca2+]i及GJIC的影响[J].中国兽医学报,2011,31(9):1 343-1 347.
[3]丰美福,史玉玲,王又明,等.巨噬细胞激活及钙作用的初步研究[J].生物物理学报,1993,9(2):226-233.
[4]李俊平,郭丽丽,陈中,等.钙超载与心肌缺血再灌注损伤及中药干预策略[J].中国中药杂志,2016,41(11):2 168-2 173.
[5]邓华,杨义,陆丽兰,等.结石类型与年龄、性别的相关性研究[J].临床泌尿外科杂志,2018,33(12):968-971.
[6]杨连珍,刘小香,李增平.世界槟榔生产现状及生产技术研究[J].世界农业,2018,7(471):121-128.
[7]王斌,杨大伟,匡理.槟榔生理活性及危害控制研究进展[J].食品研究与开发,2018,39(10):219-224.
[8]CHU Nai-shin.Effects of Betel chewing on the central and autonomic nervous systems[J].Journal of Biomedical Science,2001,8(3):229-236.
[9]CHU Nai-shin.Neurological aspects of areca and betel chewing[J].Addiction Biology,2002,7(1):111-114.
[10]梁艺馨,刘康书,蔡秋,等.连续光源火焰原子吸收法同时测定薏苡中铜、铁、钙和锰的不确定度评价[J].食品科学,2016,37(12):134-138.
[11]胡利敏,苏运聪,李飞,等.原子吸收火焰法测定婴幼儿奶粉中钙质量分数的不确定度评估[J].中国乳品工业,2018,46(8):48-50.