石墨炉原子吸收光谱法测定热封型茶叶滤纸中铅含量的不确定度评定
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摘要
目的 评定石墨炉原子吸收光谱法测定热封型茶叶滤纸中的铅含量的不确定度。方法 采用GB31604.34-2016测定热封型茶叶滤纸中的铅含量。计算工作曲线、标准溶液、样品重复测定、仪器、吸光值量化误差、消解回收率、样品称量过程引入的不确定度,建立数学模型,计算合成不确定度。结果 石墨炉原子吸收光谱法测定热封型茶叶滤纸中铅的不确定度为0.10mg/kg。结论 影响检测结果的不确定度主要来源为校准曲线与消化回收率。
Objective To evaluate the uncertainty in determination of lead content in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry. Methods The lead content in the heat-sealed tea filter paper was measured by GB 31604.34-2016. Uncertainties introduced by the working curve, standard solution, sample repeat measurement, instrument, absorbance quantification error, digestion recovery rate and sample weighing process were calculated, and a mathematical model was established to calculate the synthetic uncertainty. Results The uncertainty of determination of lead in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry was 0.10 mg/kg. Conclusion The main sources of uncertainty affecting the test results are the calibration curve and the digestion recovery rate.
Objective To evaluate the uncertainty in determination of lead content in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry. Methods The lead content in the heat-sealed tea filter paper was measured by GB 31604.34-2016. Uncertainties introduced by the working curve, standard solution, sample repeat measurement, instrument, absorbance quantification error, digestion recovery rate and sample weighing process were calculated, and a mathematical model was established to calculate the synthetic uncertainty. Results The uncertainty of determination of lead in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry was 0.10 mg/kg. Conclusion The main sources of uncertainty affecting the test results are the calibration curve and the digestion recovery rate.
引文
[1]权启爱.袋泡茶包装材料[J].中国茶叶,2005,(5):36-38.Quan QA.Materials used for package of tea bag[J].China Tea,2005,(5):36-38.
[2]陈莉荣,王思齐,苏洁,等.煤矸石复合吸附剂对含铅废水处理性能研究[J].应用化工,2016,45(5):876-881.Chen LR,Wang SQ,Su J,et al.Adsorption capability of coal gangue composite adsorbent to lead ion in wastewater[J].Appl Chem Ind,2016,45(5):876-881.
[3]Behbahani M,Hassanlou PG,Amini MM,et al.Application of solvent-assisted dispersive solid phase extraction as a new,fast,simple and reliable preconcentration and trace detection of lead and cadmium ions in fruit and water samples[J].Food Chem,2015,(187):82-88.
[4]万鹰昕,李楠,吴丼萍,等.无火焰原子吸收测定环境样品中的痕量铅[J].应用化工,2016,45(3):565-567.Wan YX,Li N,Wu LP,et al.Determination of Trace lead in environment by non-flame atomic absorption spectrometry[J].Appl Chem Ind,2016,45(3):565-567.
[5]Khaleque MA.Large-pore diameter nano-adsorbent and its application for rapid lead(II)detection and removal from aqueous media[J].Chem Eng J,2015,(273):286-295.
[6]GB 31604.34-2016食品安全国家标准食品接触材料及制品铅的测定和迁移量的测定[S].GB 31604.34-2016 National food safety standard-Determination of lead in food contact materials and products[S].
[7]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].GB 4806.8-2016 National food safety standard-Paper and cardboard materials and products for food contact[S].
[8]GB 4806.1-2016食品安全国家标准食品接触材料及制品通用安全要求[S].GB 4806.1-2016 National food safety standard-General safety requirements for food contact materials and products[S].
[9]GB/T 25436-2010热封型茶叶滤纸[S].GB/T 25436-2010 Heat sealed tea filter paper[S].
[10]JJF 1059.1-2012测量不确定度评定与表示[S].JJF 1059.1-2012 Measurement uncertainty evaluation and representation[S].
[11]JJF 1135-2005化学分析测量不确定度评定[S].JJF 1135-2005 Evaluation of uncertainty in chemical analysis measurement[S].
[12]GB/T 27411-2012检测实验室中常用不确定度评定方法与表示[S].GB/T 27411-2012 Methods and representations of uncertainty assessment in testing laboratories[S].
[13]GB/T 27418-2017测量不确定度评定和表示[S].GB/T 27418-2017 Evaluation and representation of measurement uncertainty[S].
[14]CNAS-CL01:2018检测和校准实验室能力认可准则[Z].CNAS-CL01:Standards for accreditation of laboratory capability for testing and calibration in 2018[Z].
[15]CNAS-CL01-G002:2018测量结果的溯源性要求[Z].CNAS-CL01-G002:2018 Traceability requirements for measurement results[Z].
[16]CNAS-CL01-G003:2018测量不确定度的要求[Z].CNAS-CL01-G003:2018 Measurement uncertainty requirements[Z].
[17]CNAS-CL01-A002:2018检测和校准实验室能力认可准则在化学检测领域的应用说明[Z].CNAS-CL01-A002:2018 application note for testing and calibration laboratory capability approval criteria in the field of chemical detection[Z].
[18]ISO/IEC 17025:2017检测和校准实验室的能力的通用要求[S].ISO/IEC 17025:2017 General requirements for the capability of testing and calibration laboratories[S].
[19]GB/T 15337-2008原子吸收光谱分析法通则[S].GB/T 15337-2008 General principles for atomic absorption spectrometry[S].
[20]GB/T 32465-2015化学分析方法验证确认和内部质量控制要求[S].GB/T 32465-2015 Validation and internal quality control requirements for chemical analysis methods[S].
[21]GB/T 32467-2015化学分析方法验证确认和内部质量控制术语及定义[S].GB/T 32467-2015 Terminology and definition for validation and internal quality control of chemical analysis methods[S].
[22]GB/T 35657-2017化学分析方法验证确认和内部质量控制实施指南基于样品消解的金属组分分析[S].Guidelines for validation and internal quality control of chemical analysis methods GB/T 35657-2017 implementation of sample-based metal component analysis[S].
[23]中国合格评定国家认可委员会.化学分析中不确定度的评估指南[M].北京:中国计量出版社,2002.China National Accreditation Service for Conformity Assessment.Guidance on evaluating the uncertainty in chemical analysis[M].Beijing:China Metrology Publishing House,2012.
[24]国家认证认可监督管理委员会.实验室资质认定工作指南[M].北京:中国计量出版社,2012.National Certification and Accreditation Administration.Laboratory qualification certification work guide[M].Beijing:China Metrology Publishing House,2012.
[2]陈莉荣,王思齐,苏洁,等.煤矸石复合吸附剂对含铅废水处理性能研究[J].应用化工,2016,45(5):876-881.Chen LR,Wang SQ,Su J,et al.Adsorption capability of coal gangue composite adsorbent to lead ion in wastewater[J].Appl Chem Ind,2016,45(5):876-881.
[3]Behbahani M,Hassanlou PG,Amini MM,et al.Application of solvent-assisted dispersive solid phase extraction as a new,fast,simple and reliable preconcentration and trace detection of lead and cadmium ions in fruit and water samples[J].Food Chem,2015,(187):82-88.
[4]万鹰昕,李楠,吴丼萍,等.无火焰原子吸收测定环境样品中的痕量铅[J].应用化工,2016,45(3):565-567.Wan YX,Li N,Wu LP,et al.Determination of Trace lead in environment by non-flame atomic absorption spectrometry[J].Appl Chem Ind,2016,45(3):565-567.
[5]Khaleque MA.Large-pore diameter nano-adsorbent and its application for rapid lead(II)detection and removal from aqueous media[J].Chem Eng J,2015,(273):286-295.
[6]GB 31604.34-2016食品安全国家标准食品接触材料及制品铅的测定和迁移量的测定[S].GB 31604.34-2016 National food safety standard-Determination of lead in food contact materials and products[S].
[7]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].GB 4806.8-2016 National food safety standard-Paper and cardboard materials and products for food contact[S].
[8]GB 4806.1-2016食品安全国家标准食品接触材料及制品通用安全要求[S].GB 4806.1-2016 National food safety standard-General safety requirements for food contact materials and products[S].
[9]GB/T 25436-2010热封型茶叶滤纸[S].GB/T 25436-2010 Heat sealed tea filter paper[S].
[10]JJF 1059.1-2012测量不确定度评定与表示[S].JJF 1059.1-2012 Measurement uncertainty evaluation and representation[S].
[11]JJF 1135-2005化学分析测量不确定度评定[S].JJF 1135-2005 Evaluation of uncertainty in chemical analysis measurement[S].
[12]GB/T 27411-2012检测实验室中常用不确定度评定方法与表示[S].GB/T 27411-2012 Methods and representations of uncertainty assessment in testing laboratories[S].
[13]GB/T 27418-2017测量不确定度评定和表示[S].GB/T 27418-2017 Evaluation and representation of measurement uncertainty[S].
[14]CNAS-CL01:2018检测和校准实验室能力认可准则[Z].CNAS-CL01:Standards for accreditation of laboratory capability for testing and calibration in 2018[Z].
[15]CNAS-CL01-G002:2018测量结果的溯源性要求[Z].CNAS-CL01-G002:2018 Traceability requirements for measurement results[Z].
[16]CNAS-CL01-G003:2018测量不确定度的要求[Z].CNAS-CL01-G003:2018 Measurement uncertainty requirements[Z].
[17]CNAS-CL01-A002:2018检测和校准实验室能力认可准则在化学检测领域的应用说明[Z].CNAS-CL01-A002:2018 application note for testing and calibration laboratory capability approval criteria in the field of chemical detection[Z].
[18]ISO/IEC 17025:2017检测和校准实验室的能力的通用要求[S].ISO/IEC 17025:2017 General requirements for the capability of testing and calibration laboratories[S].
[19]GB/T 15337-2008原子吸收光谱分析法通则[S].GB/T 15337-2008 General principles for atomic absorption spectrometry[S].
[20]GB/T 32465-2015化学分析方法验证确认和内部质量控制要求[S].GB/T 32465-2015 Validation and internal quality control requirements for chemical analysis methods[S].
[21]GB/T 32467-2015化学分析方法验证确认和内部质量控制术语及定义[S].GB/T 32467-2015 Terminology and definition for validation and internal quality control of chemical analysis methods[S].
[22]GB/T 35657-2017化学分析方法验证确认和内部质量控制实施指南基于样品消解的金属组分分析[S].Guidelines for validation and internal quality control of chemical analysis methods GB/T 35657-2017 implementation of sample-based metal component analysis[S].
[23]中国合格评定国家认可委员会.化学分析中不确定度的评估指南[M].北京:中国计量出版社,2002.China National Accreditation Service for Conformity Assessment.Guidance on evaluating the uncertainty in chemical analysis[M].Beijing:China Metrology Publishing House,2012.
[24]国家认证认可监督管理委员会.实验室资质认定工作指南[M].北京:中国计量出版社,2012.National Certification and Accreditation Administration.Laboratory qualification certification work guide[M].Beijing:China Metrology Publishing House,2012.