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采集云南省5个地区13个普洱茶主产地的150个茶叶样本,分析我国普洱茶镉金属富集现况。所有普洱茶检测样品中镉的含量为0.003～0.104mg/kgDW。云南西双版纳、思茅、临沧、保山、大理5地区域之间普洱茶镉含量存在显著性差异,但不足以影响质量安全。普洱生茶和熟茶之间的镉含量无显著性差异,说明现行的生茶和熟茶这两种不同的加工工艺不会带来镉的污染。研究结果表明,以西双版纳、思茅、临沧、保山、大理云南5地区为代表的中国普洱茶目前镉金属质量安全状况良好。结论推荐普洱茶镉限量标准为0.15mg/kgDW。
A total of 150 samples of tea from 13 main producing areas of Pu’er tea in 5 regions of Yunnan Province were collected to analyze the status of Cd accumulation in Pu’er tea in China. The content of cadmium in all Pu’er tea samples was 0.003 ~ 0.104mg / kgDW. Yunnan Xishuangbanna, Simao, Lincang, Baoshan, Dali 5 areas of Pu’er tea cadmium content of significant differences, but not enough to affect the quality and safety. There was no significant difference in the content of cadmium between Pu’er raw tea and ripe tea, which indicated that the two different processing technologies of the existing green tea and ripe tea would not cause the pollution of cadmium. The results show that the quality and safety of cadmium in China Pu’er tea, represented by Xishuangbanna, Simao, Lincang, Baoshan and Dali Yunnan, are good. Conclusion The recommended standard of Pu-Er tea is 0.15mg / kgDW.