食用盐中硅的测定
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摘要
采用硝酸-盐酸-氢氟酸体系进行微波消解消化样品,电感耦合等离子发射光谱法选用钇做内标测定总硅。结果表明:食用盐中硅的加标回收率为90.4%～105.9%。此方法可有效避免生成四氟化硅气体逸出,导致硅的损失,同时加入钇内标可有效去除钠的基体干扰,此方法准确性好、精密度高。
The samples are digested by microwave digestion with nitric acid-hydrochloric acid-hydrofluoric acid system,and the total silicon is determined by inductively coupled plasma atomic emission spectrometry using yttrium as the internal standard.The results show that the recovery of silicon in edible salt is 90.4%～105.9%.This method can effectively avoid the gas escaping of silicon tetrafluoride,resulting in the loss of silicon.At the same time,adding yttrium internal standard can effectively remove the matrix interference of sodium.This method has good accuracy and high precision.
The samples are digested by microwave digestion with nitric acid-hydrochloric acid-hydrofluoric acid system,and the total silicon is determined by inductively coupled plasma atomic emission spectrometry using yttrium as the internal standard.The results show that the recovery of silicon in edible salt is 90.4%～105.9%.This method can effectively avoid the gas escaping of silicon tetrafluoride,resulting in the loss of silicon.At the same time,adding yttrium internal standard can effectively remove the matrix interference of sodium.This method has good accuracy and high precision.
引文
[1]NY/T 1040—2012,绿色食品食用盐[S].
[2]杜翠鸣,邢燕侠,柴颂,等.二氧化硅与液体介质的亲和性表征[J].无机化学学报,2016,32(5):777-781.
[3]GB 25576—2010,食品添加剂二氧化硅[S].
[4]GB 8538—2016,饮用天然矿泉水检验方法[S].
[5]汪正,陈天裕,张蓓红,等.端视ICP-AES中用铟内标校正钠基体干扰的研究[J].分析实验室,2004,23(3):37-40.
[6]赵永和,时文中,冯喜兰.内标法校正Na对端视ICP-AES分析谱线干扰的研究[J].河南科学,2005,23(5):659-671.
[7]李国兴,邹玲玲.食盐中矿物质元素的ICP-AES分析[J].温州大学学报,2005,18(5):77-80.
[8]张丽萍,李伟辉,袁东,等.食盐中钙镁含量的测定[J].食品科学,2006,27(12):663-664.
[9]GB/T 27404—2008,实验室质量控制规范食品理化检测[S].
[2]杜翠鸣,邢燕侠,柴颂,等.二氧化硅与液体介质的亲和性表征[J].无机化学学报,2016,32(5):777-781.
[3]GB 25576—2010,食品添加剂二氧化硅[S].
[4]GB 8538—2016,饮用天然矿泉水检验方法[S].
[5]汪正,陈天裕,张蓓红,等.端视ICP-AES中用铟内标校正钠基体干扰的研究[J].分析实验室,2004,23(3):37-40.
[6]赵永和,时文中,冯喜兰.内标法校正Na对端视ICP-AES分析谱线干扰的研究[J].河南科学,2005,23(5):659-671.
[7]李国兴,邹玲玲.食盐中矿物质元素的ICP-AES分析[J].温州大学学报,2005,18(5):77-80.
[8]张丽萍,李伟辉,袁东,等.食盐中钙镁含量的测定[J].食品科学,2006,27(12):663-664.
[9]GB/T 27404—2008,实验室质量控制规范食品理化检测[S].