释放剂对火焰原子吸收光谱法测定乳粉中镁的影响
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摘要
目的:分析释放剂的加入对火焰原子吸收光谱法(FAAS)测定乳粉中镁含量的影响。方法:向经微波消解法预处理的乳粉中分别加入2%硝酸溶液、镧溶液和锶溶液,然后采用FAAS测定乳粉中的镁含量,并与电感耦合等离子体原子发射光谱法(ICP-AES)的检测结果进行比较。结果:释放剂的加入可以有效提高FAAS测定的准确性,尤其是以镧溶液作为释放剂时,RSD在1.6%～2.0%之间,回收率在97.7%～102.3%之间,FAAS测定的镁含量与ICP-AES的检测结果一致。结论:采用FAAS测定乳粉中的镁含量时,加入镧溶液为释放剂,结果更加准确可靠。
Objective:To assess the effect of release agents on the determination of Mg in milk powder by flame atomic absorption spectrometry(FAAS). Methods:By adding 2% nitric acid solution,lanthanum(La)solution or strontium(Sr)solution to the milk powder treated by microwave digestion,the Mg contents in the milk powder was determined by FAAS,and the results were compared with those obtained by inductively coupled plasma atomic emission spectrometry(ICP-AES). Resuts:The addition of release agent could effectively improve the accuracy of FAAS.Especially when the La solution is used as the release agent,RSD was between 1.6% and 2.0%,recovery rate was between 97.7% and 102.3%. The results obtained by FAAS are highly consistent with those obtained by ICP-AES. Conclusion:The addition of the La solution as a releasing agent was necessary to improve the accuracy and reliability,when the Mg contents in the milk powder was determined by FAAS.
Objective:To assess the effect of release agents on the determination of Mg in milk powder by flame atomic absorption spectrometry(FAAS). Methods:By adding 2% nitric acid solution,lanthanum(La)solution or strontium(Sr)solution to the milk powder treated by microwave digestion,the Mg contents in the milk powder was determined by FAAS,and the results were compared with those obtained by inductively coupled plasma atomic emission spectrometry(ICP-AES). Resuts:The addition of release agent could effectively improve the accuracy of FAAS.Especially when the La solution is used as the release agent,RSD was between 1.6% and 2.0%,recovery rate was between 97.7% and 102.3%. The results obtained by FAAS are highly consistent with those obtained by ICP-AES. Conclusion:The addition of the La solution as a releasing agent was necessary to improve the accuracy and reliability,when the Mg contents in the milk powder was determined by FAAS.
引文
[1]孟庆竹,祁丽杰,王莹.乳粉中的微量元素的分析测定[J].食品科技,2016,41(8):268-270.
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[10]杨洋,卢剑,徐春祥,等.电感耦合等离子体原子发射光谱法同时测定婴幼儿配方乳粉中12种元素[J].乳业科学与技术,2013(36):16-18.
[11]赵君威,梅坛,鄢国强,等.电感耦合等离子体原子发射光谱分析中的光谱干扰及其校正的研究进展[J].理化检验-化学分册,2013,49(3):364-369.
[12]龚琦.对电感耦合等离子体发射光谱法中一些问题的认识[J].冶金分析,2018,38(9):26-30.
[13]GB5413.21-2010食品安全国家标准婴幼儿食品和乳品中钙、铁、锌、钠、钾、镁、铜和锰的测定[S].北京:中国标准出版社,2010.
[2]刘英玉,郭庆勇,张晓红,等.微波消解-火焰原子吸收法测定新疆肉制品中的镁含量[J].现代畜牧兽医,2016(4):13-17.
[3]马清丽.镁元素与人体健康[J].世界元素医学,2011,18(1):6-7.
[4]Liu Q,Yang C H,Zhu Y,et al.Determination of Mg content in Crayfish by microwave digestion-flame atomic absorption spectrometry[J].Agricultural Science & Technology,2017,18(7):1205-1207.
[5]吴海艳,张旭,沈庆峰,等.火焰原子吸收光谱法次灵敏线的选择及其在工业硫酸锌溶液中镁测定的应用[J].冶金分析,2016,36(1):36-39.
[6]田媛媛.食品理化检验中样品前处理的方法解析[J].现代食品,2018(9):104-105.
[7]辛仁轩.等离子体发射光谱分析[M].北京:化学工业出版社,2011:7.
[8]GB 5009.241-2017 食品中镁的测定[S].北京:中国标准出版社,2017.
[9]石雅静.电感耦合等离子体发射光谱法在各个领域的应用综述[J].当代化工研究,2018(5):82-83.
[10]杨洋,卢剑,徐春祥,等.电感耦合等离子体原子发射光谱法同时测定婴幼儿配方乳粉中12种元素[J].乳业科学与技术,2013(36):16-18.
[11]赵君威,梅坛,鄢国强,等.电感耦合等离子体原子发射光谱分析中的光谱干扰及其校正的研究进展[J].理化检验-化学分册,2013,49(3):364-369.
[12]龚琦.对电感耦合等离子体发射光谱法中一些问题的认识[J].冶金分析,2018,38(9):26-30.
[13]GB5413.21-2010食品安全国家标准婴幼儿食品和乳品中钙、铁、锌、钠、钾、镁、铜和锰的测定[S].北京:中国标准出版社,2010.