Trace elements determination and health risk assessment of Tricholoma matsutake from Yunnan Province, China

Trace elements contents in Tricholoma matsutake (T. matsutake) and its corresponding soil substrates from Yunnan province of China were determined. Samples were collected from seven different locations in Yunnan province, and the contents of arsenic (As), lead (Pb), mercury (Hg), cadmium (Cd) and chromium (Cr) were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The results demonstrated that the average contents of As, Pb, Hg, Cd, and Cr in T. matsutake were 0.82–5.62, 0.34–0.82, 0.03–0.11, 0.24–2.84, and 0.13–0.62 mg/kg dry weight (DW), respectively. The results show that the contents of potentially toxic trace elements (As and Cd) exceeded statutory standard limits of China (1.0 mg/kg for As and 0.2 mg/kg for Cd) in most cases. Differences among trace elements contents from all sampling sites were found to be statistically significant (p < 0.05). Bioconcentration factor (BCF) illustrated that Cd was easily bioaccumulated by T. matsutake. Human health risks of these trace elements were assessed based on target hazard quotient (THQ). The estimated weekly intake of trace elements was estimated and compared with the Provisional Tolerable Weekly Intake (PTWI) recommended by the FAO/WHO Expert Committee on Food Additives. The results indicate that As and Cd in T. matsutake may pose a potential health risk for human beings. The estimated weekly intake of Pb, Hg, and Cr from consuming T. matsutake were lower than the PTWI.