摘要
采用BCR提取法、总量微波消解法和乙酸提取法对照研究白酒陶瓷包装中Pb、Cd、Zn、Ni和Co的溶出量及形态分布。结果表明,BCR提取法的重金属形态之和是微波消解后陶瓷包装中重金属总量的84.90%～109.38%,且含量均为Zn>Ni>Pb>Co>Cd;基于BCR提取形态的重金属溶出风险Zn和Ni最高,Pb和Co的溶出风险中等,而Cd几乎无溶出风险。BCR提取形态中弱酸提取态和可还原态之和是4%乙酸24 h重金属溶出量的79.55%～411.75%,相关分析表明弱酸提取态和体积分数4%乙酸浸泡溶液的相关性更显著。基于BCR可提取形态的相关分析,说明陶瓷包装材料在长期贮存含有酸、还原性和氧化性物质的白酒时可能会增加重金属溶出的风险。因此,采用BCR提取法可进一步深入分析白酒陶瓷包装的重金属溶出特征,为探讨重金属溶出对白酒酒质与人体健康风险提供科学依据。
The dissolution and speciation distribution of Pb, Cd, Zn, Ni, and Co from ceramic packaging of Baijiu were investigated by the BCR extraction method, microwave digestion and acetic acid extraction. Results showed that the total sum of heavy metals in the ceramic packaging detected by the BCR method was 84.90%–109.38% as compared to microwave digestion, and heavy metal concentrations consistently decreased in the order of Zn > Ni > Pb > Co > Cd. Based on the BCR speciation distribution of heavy metals from the ceramic packaging, the dissolution risk of Ni and Zn was the most serious among all heavy metals, Pb and Co had medium risk of dissolution, and there was almost no risk of Cd dissolution. In addition, the total concentration of weakly acid extractable and reducing species with BCR extraction was79.55%–411.75% as compared to 4% acetic acid extraction for 24 h. The results of correlation analysis showed that there was a more significant correlation between the weakly acid extractable species and heavy metal dissolution in 4% acetic acid.Correlation analysis of the BCR extractable species indicated that ceramic packaging may have increased risk of dissolution of heavy metals when it is used to store Baijiu containing acid and reducing and oxidizing substances for a long time.Therefore, the BCR extraction method is useful to further analyze the speciation characteristics of dissolved heavy metals from Baijiu ceramic packaging, which can provide a scientific basis for exploring the influence of heavy metal dissolution on Baijiu quality and human health risk.
作者
李杨杨
董黎明
周祺
李影影
LI Yangyang;DONG Liming;ZHOU Qi;LI Yingying(Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry,Beijing Technology and Business University,Beijing 100048,China;Key Laboratory of Solid-State Fermentation of Nongxiang Baijiu,Yibin 644000,China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2019年第6期331-337,共7页
Food Science
基金
中国轻工业浓香型白酒固态发酵重点实验室开放基金项目(2017JJ013)
关键词
BCR提取
白酒
陶瓷包装
重金属
溶出
BCR extraction
Baijiu
ceramic packaging
heavy metals
dissolution
