赤水虫茶中8种重金属含量特征及健康风险评估

Characterization of eight kinds of heavy metal contents in Chishui insect tea and health risk assessment

中文关键词:  电感耦合等离子体质谱法  虫茶  重金属  健康风险评估

英文关键词:Inductively coupled plasma mass spectrometry  Insect tea  Heavy metals  Health risk assessment

中文摘要:

      摘 要: 目的 探究贵州省赤水市所产虫茶中8种重金属（Cr、Ni、Cu、Zn、As、Cd、Hg、Pb）的含量水平并评估其潜在的饮用健康风险。方法 将采自赤水市的88份虫茶样品用80 ℃的超纯水浸泡40 min，取上清液摇匀过滤，采用电感耦合等离子体质谱仪进行测定。利用单因子污染指数法（Pi）和内梅罗综合污染指数法（Pn）对重金属的污染程度进行评价，利用预估每日摄入量（modeling daily intake, EDI）、目标危害系数法（target hazard quotient, THQ）和目标致癌风险模型（target carcinogenic risk, TCR）进行膳食健康风险评估。结果 虫茶样品中8种重金属的平均含量分别为1.558、3.344、3.366、27.020、1.774、0.858、0.011、1.385mg/kg。重金属的污染程度评价结果显示，本批次虫茶的Pi值和Pn值均小于1.0，污染等级为清洁、安全。EDI值的顺序为Zn>Cu>Ni>As>Cr>Pb>Cd>Hg，且都低于其相应的RFD值。THQ值排名依次为1>As>Cd>Pb>Cu>Ni>Cr>Zn>Hg，风险均较低。对Cr、Ni、As、Cd、Hg、Pb的TCR值进行评估，其值均在可接受范围以下。结论 贵州省赤水市所产虫茶样本的重金属污染程度尚轻，对消费者的膳食健康风险和致癌风险均较低。

英文摘要:

      ABSTRACT: Objective To investigate the levels of eight kinds of heavy metals (Cr, Ni, Cu, Zn, As, Cd, Hg, Pb) in insect tea produced in Chishui City, Guizhou Province, and to assess their potential health risks. Methods 88 insect tea samples from Chishui City were soaked in ultrapure water at 80℃ for 40 min, and the supernatant was shaken and filtered, and then determined by inductively coupled plasma mass spectrometry (ICP-MS). The pollution degree of heavy metals was evaluated by using the single-factor pollution index (Pi) and Nemero's comprehensive pollution index (Pn), and the estimated daily intake (EDI), target hazard quotient (THQ) and target carcinogenic risk (TCR) were used for dietary health risk assessment. Results The average contents of eight kinds of heavy metals in the insect tea samples were 1.558, 3.344, 3.366, 27.020, 1.774, 0.858, 0.011, and 1.385 mg/kg, respectively. The evaluation of the contamination degree of the heavy metals showed that the Pi and the Pn value of those samples were less than 1.0, and the contamination level was clean and safe. The EDI values were ranked in the order of 1>Cu>Ni>As>Cr>Pb>Cd>Hg, and all of them were lower than their corresponding RFD values. THQ values ranked in the order of 1>As>Cd>Pb>Cu>Ni>Cr>Zn>Hg, and the risks were all low. The TCR values for Cr, Ni, As, Cd, Hg, and Pb were evaluated, and their values were all below the acceptable range. Conclusion The samples of insect tea produced in Chishui City, Guizhou Province, showed a low level of heavy metal contamination, and the dietary health risk and carcinogenic risk to consumers were low.