摘要
【目的】测定不同产地、不同采摘期柴达木枸杞中的24种元素的含量,并对重金属含量进行评价.【方法】样品经微波消解后分别采用原子吸收分光光度法测定Pb和Cd的含量;原子荧光光谱法测定Hg和As的含量;ICP-OES法测定20种无机元素的含量,并选取K、Fe、Zn等9种主要元素,结合SPSS 19.0统计软件进行主成分分析.【结果】不同产地、不同采摘期柴达木枸杞中元素的种类相似,但含量存在一定差异.Fe、Cu、Mn和Zn的平均含量分别为49.80、2.55、5.84和4.80mg/kg.重金属Hg、Pb、Cu、Cd的含量都低于2015版《中华人民共和国药典》限量要求.主成分综合分析结果得出产于德令哈的枸杞较优.【结论】柴达木枸杞24种元素的含量与其生长环境、生长期、植物的生理活动有一定的关联性.
[Objective] To determine 24 inorganic elements in Qaidam Chinese wolfberry from different habitats and harvesting time, to evaluate heavy metals. [Method] Samples were dissolved by microwave. Content of Pb and Cd was determined by atomic absorption spectrophotometry; content of Hg and As was determined by atomic fluorescence spectrometry; Content of 20 elements were determined by inductively coupled plasma atomic emission spectrometry. Meanwhile, 9 primary elements were selected to the object of principal component analysis by SPSS 19. 0 software. [Result] There were similar types of elements,while there was a certain difference in the content of elements from different habitats and different harvesting time. The average content of Fe, Cu,Mn and Zn was 49.80,2. 55,5.84 and 4. 80 mg/kg, respectively. Con- tent of heavy metals (Pb, Cd, Hg, As, Cu) in all samples were lower than the 2015 edition of Chinese Phar- macopoeia Requirements. [Conclusion] Contents of 24 inorganic elements in Qaidam Chinese wolfberry from different habitats and harvesting time are closely related to their growing environment, growth stages and physical activities.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2017年第2期92-99,共8页
Journal of Gansu Agricultural University
基金
中国科学院藏药现代化重点实验室项目(Y4496110Z1)
关键词
柴达木枸杞
微量元素
重金属评价
电感耦合等离子体-原子发射光谱法
主成成分分析
Qaidam Chinese wolf berry
trace elements
evaluation of heavy metals
inductively coupledplasma atomic emission spectrometry
principal component analysis