title: Determination of essential and toxic elements in Cordyceps kyushuensis Kawam by inductively coupled plasma mass spectrometry.
abstract: In this study, a total of 20 elements (essential, non-essential and toxic): lithium (Li), sodium (Na), potassium (K), gallium (Ga), magnesium (Mg), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), vanadium (V), chromium (Cr), nickel (Ni), cobalt (Co), molybdenum (Mo), selenium (Se), barium (Ba), tin (Sn), arsenic (As), lead (Pb) cadmium (Cd) and mercury (Hg) in natural and cultured Cordyceps kyushuensis have been determined by means of inductively coupled plasma mass spectrometry (ICP-MS). Cultured stroma, natural stroma and natural worm were digested by microwave-assisted method before analysis. The proposed ICP-MS method was validated by analyzing a certified reference material (CRM) GBW10015 (spinach). The results of one-way analysis of variance (ANOVA) revealed that the element concentrations in the three kinds of samples were significantly different (p<0.05). Except for Mg, Zn, Cu, the values of other elemental contents were the highest in the stroma of natural C. kyushuensis. In comparison with the worm, the concentrations of determined elements in wild stroma were higher. The remarkable difference of elemental contents between cultured and natural stroma may be caused by distinct growing environment. This finding highlighted the usefulness of ICP-MS elemental analysis and enhanced the value of C. kyushuensis as a candidate for nourishing food based on its composition.
authors.affiliation: State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
authors.forename: Guoying
authors.initials: G
authors.lastname: Zhang
authors.forename: Yanxin
authors.initials: Y
authors.lastname: Zhao
authors.forename: Fengjun
authors.initials: F
authors.lastname: Liu
authors.forename: Jianya
authors.initials: J
authors.lastname: Ling
authors.forename: Jianqiang
authors.initials: J
authors.lastname: Lin
authors.forename: Changkai
authors.initials: C
authors.lastname: Zhang
mesh_terms: D000704:Analysis of Variance; D032661:Cordyceps / Q000737:chemistry*; D013058:Mass Spectrometry / Q000379:methods*; D014131:Trace Elements / Q000737:chemistry*
chemical_list: D014131:Trace Elements