氢化物原子荧光光谱法测定食品接触用纸中砷的不确定度评定
|
摘要
目的通过分析原子荧光光谱法测定食品接触用纸中不确定度的主要来源,对其测定结果的不确定度进行评定。方法采用GB 31604.38-2016 《食品安全国家标准食品接触材料及制品砷的测定和迁移量的测定》对食品接触用纸中砷的含量进行测定,同时构建数学模型,对各分量不确定度进行评定。结果样品称量产生的相对不确定度为0.00029,定容产生的不确定度为0.00011,标准溶液及配制产生的相对不确定度为0.00478,工作曲线拟合产生的相对不确定度为0.0271,样品重复性测定产生的相对不确定度为0.0074,测得食品接触用纸中砷的浓度为(0.136±0.008)mg/kg,k=2。结论标准曲线拟合产生的不确定度是不确定度的主要来源,故在测定过程中要控制标准曲线引入的不确定度。
Objective The main source of uncertainty in food contact paper was determined by analytical atomic fluorescence spectrometry,and the uncertainty of its determination was evaluated.Methods GB 31604.38-2016 "Food safety national food contact materials and products arsenic determination and migration measurement" to determine the content of arsenic in food contact paper,while constructing a mathematical model to assess the uncertainty of each component.Results The relative uncertainty of sample weighing is 0.00029,the uncertainty of constant volume is 0.00011,the relative uncertainty of standard solution and preparation is 0.00478,the relative uncertainty of working curve fitting is 0.0271,the relative uncertainty of sample repeat measurement was 0.0074,and the concentration of arsenic in food contact paper was(0.136±0.008) mg/kg,k=2.Conclusion The uncertainty produced by the standard curve fitting is the main source of uncertainty,so the uncertainty introduced by the standard curve should be controlled during the measurement.
Objective The main source of uncertainty in food contact paper was determined by analytical atomic fluorescence spectrometry,and the uncertainty of its determination was evaluated.Methods GB 31604.38-2016 "Food safety national food contact materials and products arsenic determination and migration measurement" to determine the content of arsenic in food contact paper,while constructing a mathematical model to assess the uncertainty of each component.Results The relative uncertainty of sample weighing is 0.00029,the uncertainty of constant volume is 0.00011,the relative uncertainty of standard solution and preparation is 0.00478,the relative uncertainty of working curve fitting is 0.0271,the relative uncertainty of sample repeat measurement was 0.0074,and the concentration of arsenic in food contact paper was(0.136±0.008) mg/kg,k=2.Conclusion The uncertainty produced by the standard curve fitting is the main source of uncertainty,so the uncertainty introduced by the standard curve should be controlled during the measurement.
引文
[1] 康家琦.砷对健康危害的研究进展[J].卫生研究,2004,33(3):372-376.
[2] 中华人民共和国卫计委.GB 4806.8-2016 食品安全国家标准食品接触用纸和纸板材料及制品[S].北京:中国标准出版社,2016.
[3] 卢海燕,张琰.原子荧光光度法测定水中砷的不确定度评定[J].化学工程师,2013,27(3):32-35.
[4] 张亚冬,王卉丹.氢化物原子荧光光谱法测定大米粉中总砷的不确定度评定研究[J].黑龙江粮食,2017(4):44-46.
[5] 革丽亚,麦琦,黄常刚,等.原子荧光光谱法测定PTC-T087酱油中总砷的不确定度评定[J].职业与健康,2016,32(15):2062-2065.
[6] 辜忠春,李光荣,李军章,等.原子荧光光谱法测定香菇中砷的不确定度评定[J].食品研究与开发,2017(19):117-121.
[7] 陈旻实,梁震,刘伟, 等.氢化物原子荧光光度法测定食品添加剂中砷含量的不确定度评定[J].福建分析测试,2017(4):43-47.
[8] 屈明华,范骏,姚科伟.氢化物原子荧光光谱法测定土壤中砷的不确定度评定[J].光谱实验室,2007,24(3):463-470.
[9] 陈素萍,吕迪.原子荧光光谱法测定首饰金中砷含量的不确定度评定[J].福建分析测试,2018(1):33-38.
[10] 吴晋霞,李玲,周益民,等.氢化物发生-原子荧光光谱法测定环境空气中砷和锑的结果不确定度评定[J].新疆大学学报(自然科学版),2011,28(1):83-87.
[11] 倪永标 ,诸葛海涛 ,闻诚 ,等.石墨炉原子吸收光谱法测定食品包装纸中的铅的不确定度评价[J].食品安全导刊,2017(36):92-93.
[12] 中华人民共和国卫计委.GB 31604.38-2016 食品安全国家标准食品接触材料及制品砷的测定和迁移量的测定定[S].北京:中国标准出版社,2016.
[2] 中华人民共和国卫计委.GB 4806.8-2016 食品安全国家标准食品接触用纸和纸板材料及制品[S].北京:中国标准出版社,2016.
[3] 卢海燕,张琰.原子荧光光度法测定水中砷的不确定度评定[J].化学工程师,2013,27(3):32-35.
[4] 张亚冬,王卉丹.氢化物原子荧光光谱法测定大米粉中总砷的不确定度评定研究[J].黑龙江粮食,2017(4):44-46.
[5] 革丽亚,麦琦,黄常刚,等.原子荧光光谱法测定PTC-T087酱油中总砷的不确定度评定[J].职业与健康,2016,32(15):2062-2065.
[6] 辜忠春,李光荣,李军章,等.原子荧光光谱法测定香菇中砷的不确定度评定[J].食品研究与开发,2017(19):117-121.
[7] 陈旻实,梁震,刘伟, 等.氢化物原子荧光光度法测定食品添加剂中砷含量的不确定度评定[J].福建分析测试,2017(4):43-47.
[8] 屈明华,范骏,姚科伟.氢化物原子荧光光谱法测定土壤中砷的不确定度评定[J].光谱实验室,2007,24(3):463-470.
[9] 陈素萍,吕迪.原子荧光光谱法测定首饰金中砷含量的不确定度评定[J].福建分析测试,2018(1):33-38.
[10] 吴晋霞,李玲,周益民,等.氢化物发生-原子荧光光谱法测定环境空气中砷和锑的结果不确定度评定[J].新疆大学学报(自然科学版),2011,28(1):83-87.
[11] 倪永标 ,诸葛海涛 ,闻诚 ,等.石墨炉原子吸收光谱法测定食品包装纸中的铅的不确定度评价[J].食品安全导刊,2017(36):92-93.
[12] 中华人民共和国卫计委.GB 31604.38-2016 食品安全国家标准食品接触材料及制品砷的测定和迁移量的测定定[S].北京:中国标准出版社,2016.