干巴菌中部分重金属元素及无机砷、 甲基汞含量分析

目的检测干巴菌中5种重金属总砷、总汞、铅、镉、铬及无机砷和甲基汞的含量,探讨干巴菌对重金属的生物富集作用。方法采用电感耦合等离子体质谱法检测总砷、总汞、铅、镉含量,采用液相原子荧光光度计联用检测无机砷、甲基汞的含量。结果 31份干巴菌样品中总砷、总汞、铅、镉的检出率均为100%,无机砷的检出率为50%,甲基汞在全部样品中均未检出。昆明的干巴菌样品中砷含量较高,达0.46 mg/kg;曲靖的干巴菌中铅含量有0.9997 mg/kg;镉含量较高,为0.46 mg/kg。结论总体来看不同地区的干巴菌中总砷、总汞、镉、铬、无机砷和甲基汞的含量处于较低水平,但铅含量偏高。干巴菌对重金属没有特异性吸收富集能力。

Analysis of some heavy metal elements, inorganic arsenic and methyl mercury in Thelephora ganbajun

Objective To detect the content of total arsenic, total mercury, lead, cadmium, chromium, inorganic arsenic and methylmercury in 5 heavy metals in Thelephora ganbajun, and explore the bioaccumulation of heavy metals by Thelephora ganbajun. Methods The content of total arsenic, mercury, lead and cadmium were detected by inductively coupled plasma mass spectrometry, and inorganic arsenic and methyl mercury were detected by liquid phase atomic fluorescence photometer. Results The detection rates of total arsenic, total mercury, lead and cadmium in 31 samples of dry bacteria were 100%, the detection rate of inorganic arsenic was 50%, and methyl mercury was not detected in all samples. The content of arsenic in dried samples of Kunming was 0.46 mg/kg; the content of lead in dried bacteria in Qujing area was 0.9997 mg/kg; the content of cadmium was higher in Qujing area, which was 0.46 mg/kg. Conclusion In general, the content of total arsenic, total mercury, cadmium, chromium, inorganic arsenic and methylmercury in Thelephora ganbajun in different regions is at a low level, but the lead content is high. Thelephora ganbajun has no specific absorption and enrichment ability for heavy metals.