摘要
以HClO_4-HNO_3为消解体系,采用湿法消解,通过火焰原子吸收法测定两种不同生长环境下十香菜中K,Ca,Mg,Fe,Cu,Pb元素的含量.结果表明:两种十香菜都含有丰富的人体必需元素K,Ca,Mg,Fe,还含有一定量的重金属元素Cu,Pb,但样本生长环境不同,各元素含量有一定的差异;同一生长环境下,十香菜的茎、叶中相同元素含量也有一定的差别,除Mg外,其他5种元素在叶中的含量均高于在茎中的含量.加标回收实验结果表明,Fe和Cu元素加标回收率为84%~107%,精密度为0.5%~1.3%,说明本实验方法准确,结果可靠.
The contents of K,Ca,Mg,Fe,Cu and Pb in ten coriander samples from two kinds of different growing regions was evaluated in HCl O4-HNO3 digestive system by using wet digestion and flame atomic absorption spectrophotometry（FAAS）.The results showed that two kinds of ten coriander samples contained high contents of K,Ca,Mg and Fe of human requirements,as well as a certain amount of heavy metal elements Cu and Pb.But the element contents of ten coriander samples from different growing regions had the certain differences.The certain differences in element contents were also observed between the leaves and stems of ten coriander in the same growing region,in addition to Mg,the content of other five elements in the leaves were higher than that of stem,standard addition recovery experiment showed that the average recovery84% ～ 107% and the relative standard deviation 0.5% ～ 1.3% of Fe and Cu elements.The experimental method was accurate and the results were reliable.
出处
《轻工学报》
CAS
2017年第2期1-6,共6页
Journal of Light Industry
基金
国家自然科学基金项目(31271854)
关键词
十香菜
微量元素
富集能力
火焰原子吸收法
ten coriander
trace element
accumulation ability
flame atomic absorption spectrophotomentry
