石墨炉标准加入法测定白酒质控样中铅含量
|
摘要
白酒样品加热除掉乙醇,微波消解定容,经石墨炉原子化后,在283.3 nm处测定吸光值。在一定浓度范围内的铅的吸光值与铅含量成正比。结果显示,采用标准曲线校正法测No:QC-156A-3白酒质控样品铅含量为0.262 mg/L,比质控样品中铅的指定值0.301 mg/L低12.3%;而采用标准加入校正法以消除白酒基体引入的干扰,测得铅含量为0.309 mg/L,更接近指定值。
Ethanol was removed from liquor samples by heating and microwave digestion,after atomization in graphite furnace,the absorbance value was determined at 283.3 nm. The absorbance of lead in a certain concentration range is proportional to the lead content. The results showed that the lead content of No:QC-156 A-3 liquor quality control samples was 0.262 mg/L by standard curve correction method,which was 12.3 %lower than the specified lead content of 0.301 mg/L in quality control samples;while the interference of liquor matrix was eliminated by standard addition correction method,and the lead content was 0.309 mg/L,which was closer to the specified value.
Ethanol was removed from liquor samples by heating and microwave digestion,after atomization in graphite furnace,the absorbance value was determined at 283.3 nm. The absorbance of lead in a certain concentration range is proportional to the lead content. The results showed that the lead content of No:QC-156 A-3 liquor quality control samples was 0.262 mg/L by standard curve correction method,which was 12.3 %lower than the specified lead content of 0.301 mg/L in quality control samples;while the interference of liquor matrix was eliminated by standard addition correction method,and the lead content was 0.309 mg/L,which was closer to the specified value.
引文
[1]曹会兰.铅对人类的危害及防治[J].渭南师范学院学报:综合版,2001,16(5):53-55
[2]中华人民共和国国家卫生和计划生育委员会,国家食品药品监督管理总局.食品安全国家标准食品中铅的测定:GB 5009.12-2017[S].北京:中国标准出版社,2017:1-4
[3]杨惠芬,李明元.食品卫生理化检验手册[M].北京:中国标准出版社,1997:101-112
[4]邹学贤.分析化学[M].北京:人民卫生出版社,2000:192-1334
[5]郝莉鹏,詹铭,郑嵘.开放式微波消解与干灰化法消解测量食品中铅的方法比较[J].理化检验:化学分册,2003,41(5):278-279
[6]刘永康,戴猛.全血中铅的石墨炉原子吸收光谱测定方法改进[J].实用预防医学,2011,18(7):1222-1224
[7]周勇义,谷学新,范国强,等.微波消解技术及其在分析化学中的应用[J].2004,29(2):30-36
[8]郭防.钯作为基体改进剂在石墨炉原子吸收光谱法测定尿铅中的应用[J].中国医学创新,2013,10(7):91-92
[9]陈忆文,彭谦,赵飞蓉.不同基体改进剂在石墨炉原子吸收法直接检测尿铅的应用研究[J].中国卫生检验杂志,2006,16(2):177-178
[10]吴晓岚,马蓉,王艳.石墨炉原子吸收光谱法测定土壤中的铅---微波消解与电热板消解比较试验[J].西南农业学报,2005,21(3):362-364
[11]崔明坤,娄峰阁.原子吸收光谱法测定酒中铅含量的测量不确定度评价[J].中国卫生检验杂志,2009,19(6):1435-1436
[2]中华人民共和国国家卫生和计划生育委员会,国家食品药品监督管理总局.食品安全国家标准食品中铅的测定:GB 5009.12-2017[S].北京:中国标准出版社,2017:1-4
[3]杨惠芬,李明元.食品卫生理化检验手册[M].北京:中国标准出版社,1997:101-112
[4]邹学贤.分析化学[M].北京:人民卫生出版社,2000:192-1334
[5]郝莉鹏,詹铭,郑嵘.开放式微波消解与干灰化法消解测量食品中铅的方法比较[J].理化检验:化学分册,2003,41(5):278-279
[6]刘永康,戴猛.全血中铅的石墨炉原子吸收光谱测定方法改进[J].实用预防医学,2011,18(7):1222-1224
[7]周勇义,谷学新,范国强,等.微波消解技术及其在分析化学中的应用[J].2004,29(2):30-36
[8]郭防.钯作为基体改进剂在石墨炉原子吸收光谱法测定尿铅中的应用[J].中国医学创新,2013,10(7):91-92
[9]陈忆文,彭谦,赵飞蓉.不同基体改进剂在石墨炉原子吸收法直接检测尿铅的应用研究[J].中国卫生检验杂志,2006,16(2):177-178
[10]吴晓岚,马蓉,王艳.石墨炉原子吸收光谱法测定土壤中的铅---微波消解与电热板消解比较试验[J].西南农业学报,2005,21(3):362-364
[11]崔明坤,娄峰阁.原子吸收光谱法测定酒中铅含量的测量不确定度评价[J].中国卫生检验杂志,2009,19(6):1435-1436