梅州金柚中金属元素分析及膳食风险评估

Metallic element analysis and dietary risk assessment of Meizhou golden pomelo

中文关键词:  电感耦合等离子体质谱法  梅州金柚  金属元素  风险评估  风险指数  目标危害系数

英文关键词:inductively coupled plasma-mass spectrometry  Meizhou golden pomelo  metallic element  risk assessment  risk index  target hazard quotient/total target hazard quotient

中文摘要:

      目的 采用电感耦合等离子体质谱法(inductively coupled plasma-mass spectrometry, ICP-MS)检测梅州金柚中12种金属元素含量, 分析其分布特征, 并对梅州金柚进行膳食风险评估。方法 样品经硝酸消化, 微波消解, 赶酸后上机测定。采用风险指数(risk index, RI)及目标危害系数(target hazard quotient/total target hazard quotient, THQ/TTHQ)对梅州金柚进行重金属污染风险评估。结果 果皮中Mg、Ca、Fe、Zn、Se、Cu、Cr、As、Mn、Al元素含量普遍大于果肉中各元素含量, 以Mg、Ca元素最为明显。除4批次金柚果皮Se含量稍大于0.01 mg/kg以外, 其他批次样品Se含量均小于0.01 mg/kg, 故所检梅州金柚并不富硒。金柚样品中Cd的检测值≤0.007 mg/kg, Pb检出值≤0.091 mg/kg, 均低于国家限量标准。结论 金柚中含有丰富的金属元素。Fe、Zn、Se、Cu、Cr、As、Mn、Al元素RI≤9.321%, Cd及Pb元素THQ/TTHQ＜1, 表明梅州金柚无明显膳食风险。

英文摘要:

      Objective To analyze the content and distribution characteristics of 12 kinds of metal elements in Meizhou golden pomelo by inductively coupled plasma-mass spectrometry (ICP-MS) and assess dietary risk assessment of heavy metal contamination of Meizhou golden pomelo. Methods The samples were digested by nitric acid combined with microwave, and then determined by ICP-MS after driving the acid. Risk index (RI) and target hazard quotient/total target hazard quotient (THQ/TTHQ) were used to evaluate the risk of metal contamination of Meizhou golden pomelo. Results The content of Mg, Ca, Fe, Zn, Se, Cu, Cr, As, Mn and Al in the peel was generally higher than those in the flesh, and Mg and Ca was the most obvious. Except for the 4 batches of golden pomelo whose selenium content was slightly greater than 0.01 mg/kg, the other batches of samples had Se content less than 0.01 mg/kg, so the samples of Meizhou golden pomelo were not rich in Se. The detection range of Cd in gold pomelo samples was less than 0.007 mg/kg, and the detection value of Pb was less than 0.091 mg/kg, lower than the national limit standard. Conclusion Meizhou gold pomelo is rich in metal elements. RI and THQ/TTHQ evaluation results show that RI of Fe, Zn, Se, Cu, Cr, As, Mn and Al is less than 9.321%, and THQ/TTHQ for Cd and Pb is less than 1, indicating that there is no significant dietary risk of Meizhou golden pomelo.