食品科学

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ICP-MS法测定云南省8 种野生牛肝菌中矿质元素含量

邢 博,张 霁,李杰庆,王元忠,刘鸿高   

  1. 1.云南农业大学农学与生物技术学院,云南 昆明 650201;2.云南省农业科学院药用植物研究所,云南 昆明 650200;
    3.云南省省级中药原料质量监测技术服务中心,云南 昆明 650200
  • 出版日期:2016-06-25 发布日期:2016-06-29
  • 通讯作者: 王元忠
  • 基金资助:

    国家自然科学基金地区科学基金项目(31260496;31460538)

Determination of Mineral Elements Contents in Eight Wild Boletus Species from Yunnan by ICP-MS

XING Bo, ZHANG Ji, LI Jieqing, WANG Yuanzhong, LIU Honggao   

  1. 1. College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China;
    2. Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming 650200, China;
    3. Yunnan Technical Center for Quality of Chinese Materia Medical, Kunming 650200, China
  • Online:2016-06-25 Published:2016-06-29
  • Contact: WANG Yuanzhong

摘要:

以云南省8 种野生牛肝菌为对象,研究子实体不同部位矿质元素含量、吸收和积累特征。采用微波消解处理样品,以电感耦合等离子体质谱法测定云南省8 种野生牛肝菌子实体菌柄、菌盖中Mg、Mn、Fe、Ni、Cu、Zn、Cr、As、Cd、Pb、Li、Ba 12 种矿质元素的含量,并用SPSS软件进行方差分析,从元素的角度对其进行安全性评价,分析牛肝菌中矿质元素的含量水平。结果显示,标准品(GBW 10015)中12 种矿质元素回收率在88%~105%之间,检出限在0.036~9.456 μg/L之间,表明该方法准确、可靠;8 种野生牛肝菌菌柄与菌盖中含有丰富的Fe、Mg、Mn、Zn和Cu元素;Zn、Mg、Cu、Cr和As元素在多数子实体内菌盖的含量高于菌柄,Li和Ba在多数牛肝菌样品中菌柄含量较高;有毒重金属元素Pb、As、Cd、Ni和Cr含量均高于GB 2762—2012《食品中污染物的限量》的规定,对人体健康有潜在风险。通过数据分析表明,野生牛肝菌中12 种矿质元素含量具有显著差异,同一元素在不同牛肝菌中的含量差异较大,相同子实体菌柄与菌盖中含量差异显著,对矿质元素和重金属元素有较好的吸收和富集能力。

关键词: 微波消解, 电感耦合等离子体质谱法, 野生牛肝菌, 矿质元素

Abstract:

The contents, absorption and accumulation of mineral elements in different parts of fruit bodies of 8 wild Boletus
species collected from Yunnan province were investigated. The contents of 12 metal elements (Mg, Mn, Fe, Ni, Cu, Zn, Cr,
As, Cd, Pb, Li, and Ba) in stipes and caps were determined by inductively coupled plasma mass spectrometry (ICP-MS)
after microwave digestion. All data obtained were analyzed by analysis of variance (ANOVA) through SPSS. The safety of
Boletus consumption was evaluated on the basis of the mineral element data. The results showed that the recovery rates of
12 metals in a standard material GBW 10015 (spinach) ranged from 88% to 105% and the limits of detection (LODs) were
0.036–9.456 μg/L, indicating that the method is accurate and reliable. Both stipes and caps from eight wild Boletus species
were rich in Fe, Mg, Mn, Zn and Cu. For most of the Boletus species studied, the contents of Zn, Mg, Cu, Cr and As were
higher in caps than in stipes, whereas Li and Ba were higher in stipes than in caps. The levels of toxic heavy metals (Pb, As,
Cd, Ni and Cr) were higher than the maximum levels of contaminants in foods according to the Chinese National Standard
GB 2762—2012, suggesting potential health risks. The contents of 12 element contents in wild Boletus species were
significantly different among 8 wild Boletus species and among different parts of the same species. The results also showed
that the wild mushroom species could absorb and accumulate mineral elements and heavy metals.

Key words: microwave digestion, inductively coupled plasma mass spectrometry (ICP-MS), wild Boletus, mineral elements

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