微波辅助FAAS法测定不同季节大新苦丁茶中四种重金属含量  

Determination of four Heavy Metals Content in Kudingcha in Different Seasons by Microwave Assisted Flame Atomic Absorption Spectrometry

作　　者：何业江 韦光雪 陆丽怡 翁艳英 张贞发 He Yejiang;Wei Guangxue;Lu Liyi;Weng Yanying;Zhang Zhenfa(School of Chemical and Chemical Engineering Guangxi Normal University for Nationalities,Chongzuo 532200;Guangxi dh-hydrogenated Co.,Ltd.,Chongzuo 532200,China)

机构地区：[1]广西民族师范学院化学化工学院,广西崇左532200 [2]广西鼎弘树脂有限公司,广西崇左532200

出　　处：《广东化工》2020年第16期170-171,162,共3页Guangdong Chemical Industry

基　　金：广西高校中青年教师基础能力提升项目(2017KY0838)。

摘　　要：为了检测大新苦丁茶中四种重金属不同季节的含量,建立了微波消解-火焰原子吸收测定铅、锰、铬、镉4种重金属元素的方法,测定了大新苦丁茶产品和苦丁茶树叶中4种重金属元素的含量,探究了苦丁茶树叶中锰元素在春、夏、秋三个季节的含量差异。结果显示,大新苦丁茶产品和新鲜苦丁茶树叶中铬、镉和铅元素均未检出,锰元素含量处于0.07~0.08μg/g之间,苦丁茶树叶中的锰含量秋季>夏季>春季。方法检出限为0.01~0.09μg/mL,精密度试验RSD为0.24%~2.20%之间,加标回收率为94.20%~103.80%。In order to determine the contents of four heavy metals in Daxin Kudingcha, a method for the determination of lead, manganese, chromium and cadmium by microwave assisted Flame Atomic absorption spectrometry was established, then the contents of four heavy metals in Daxin Kudingcha products and fresh Kuding tea leaves were determined and The content differences of manganese in leaves of Daxin Kudingcha in spring, summer and autumn were investigated. The results showed that the contents of chromium, cadmium and lead in Daxin Kudingcha products and fresh Kudingcha leaves were not detected, and the content of manganese was between 0.07 and 0.08 ug/g. In spring, summer and autumn, the manganese content in the leaves of kuding tea is the highest in autumn and the lowest in spring. The detection limit of the method was 0.01~0.09 μg/mL, the RSD was 0.24 %~2.20 %, and the recovery ratio was 94.20 %~103.80 %.

关 键 词：微波消解 火焰原子吸收光谱法 大新苦丁茶 重金属 

分 类 号：O65[理学—分析化学]