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重庆地产茶叶中重金属含量现状分析与评价 被引量:3
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作者 冷崇姣 杨针 +1 位作者 彭术 龚士学 《保健医学研究与实践》 2019年第4期10-14,共5页
目的检测重庆地产茶叶中的重金属含量,了解重庆地产茶叶的重金属污染程度。方法2018年抽取重庆本地31个区县400批茶叶样品,按照铅(Pb)、镉(Cd)、汞(Hg)和砷(As)国标检测方法进行Pb,Cd,Pb及As含量检测,结合茶叶的相关质量标准,采用单因... 目的检测重庆地产茶叶中的重金属含量,了解重庆地产茶叶的重金属污染程度。方法2018年抽取重庆本地31个区县400批茶叶样品,按照铅(Pb)、镉(Cd)、汞(Hg)和砷(As)国标检测方法进行Pb,Cd,Pb及As含量检测,结合茶叶的相关质量标准,采用单因子污染指数法、单因子综合污染指数法和内梅罗(Nemerow)综合污染指数法进行污染评价。结果重庆本地产茶叶中重金属含量因品种不同有一定的差异,重金属Pb,Cd,Hg及As的含量分别为0.0300~3.0200mg/kg,0.0090~0.7770mg/kg,0.0000~0.0600mg/kg,0.0000~0.8800mg/kg,总体含量处于较低水平,大部分地区的茶叶未受到Pb,Cd,Hg,As的污染。数据分析显示,重庆地产茶叶中Pb与Cd及Pb与As的含量之间存在显著的相关性,茶叶样品中各元素的单因子综合污染指数均小于0.7,Nemerow综合污染指数也均小于0.7。结论重庆地产茶叶中重金属含量处于比较安全的水平。 展开更多
关键词 地产茶叶 重金属 含量 污染评价
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广东省本地产茶叶中15种农药残留污染状况调查 被引量:6
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作者 朱盼 万欢 +5 位作者 王晶 黄建华 吴西梅 龙朝阳 黄伟雄 吴永宁 《中国食品卫生杂志》 CSCD 北大核心 2022年第1期69-74,共6页
目的了解广东省本地产茶叶中农药残留品种及其污染水平,明确茶叶质量安全状况,以期为生产监管和消费提供依据。方法采集110份广东省本地产茶叶,采用GC-MS/MS方法对茶叶中10种拟除虫菊酯和5种有机氯类农药残留进行检测,并依据食品安全国... 目的了解广东省本地产茶叶中农药残留品种及其污染水平,明确茶叶质量安全状况,以期为生产监管和消费提供依据。方法采集110份广东省本地产茶叶,采用GC-MS/MS方法对茶叶中10种拟除虫菊酯和5种有机氯类农药残留进行检测,并依据食品安全国家标准GB 2763—2021评价茶叶中多农残的超标状况。结果广东省本地产茶叶共检出10种农药残留,主要残留品种为联苯菊酯、甲氰菊酯和氯氰菊酯,其中联苯菊酯检出率最高为73.64%,均值为0.346 mg/kg,且在乌龙茶中残留均值最大;仅有4份样本存在氰戊菊酯或甲氰菊酯残留超标现象;存在多组分农药联合污染现象;联苯菊酯、甲氰菊酯和氯氰菊酯残留水平存在地域性差异规律,原产地为粤东地区(潮州和梅州)污染水平较高,而粤北(韶关和清远)和珠三角地区(肇庆)污染水平相对较低。结论广东本地产茶叶农药残留检出率较高,但超标率较低,整体合格率高。政府监管部门应对主要检出的联苯菊酯、甲氰菊酯和氯氰菊酯进行重点监测。 展开更多
关键词 地产茶叶 多农药残留 污染状况
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Research on Geographical Indications and Cultural Heritage of Famous Tea in Hubei 被引量:1
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作者 孙志国 黄莉敏 +2 位作者 熊晚珍 王树婷 钟学斌 《Agricultural Science & Technology》 CAS 2012年第3期502-506,536,共6页
In the study, analysis was made on present situation and development measures of geographical indications and cultural heritage protection of famous teas in Hubei Province. In addition, 8 related suggestions were prop... In the study, analysis was made on present situation and development measures of geographical indications and cultural heritage protection of famous teas in Hubei Province. In addition, 8 related suggestions were proposed as well. 展开更多
关键词 TEA Geographical indication Cultural heritage Tangible cultural heritage Intangible cultural heritage Hubei Province
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Sectoral Agglomeration and Urban Development: The History of Tunxi--The Tea Business Centre in Huizhou
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作者 Yi Zou Xi Lin 《Fudan Journal of the Humanities and Social Sciences》 2016年第4期643-661,共19页
From the perspective of historical geography, Tunxi as the chosen centre for tea production in the Qing could not be explained geographically alone by the river system of Huizhou, in which stead this article attempts ... From the perspective of historical geography, Tunxi as the chosen centre for tea production in the Qing could not be explained geographically alone by the river system of Huizhou, in which stead this article attempts a historicogeographical analysis by shifting our attention towards the sector-specific agglomeration of rel- evant industries and urbanisation. Due to the restrictions by the imperial government on using sea ports (e.g. Shanghai) for the transportation of tea south- wards for sale and export, Tunxi was made the centre for tea trade, not only due to its geographical convenience to tax clearance, but also because of the agglomeration of tea-related industries in the City, such as tin-can, box and bamboo-crate ware- houses. There also had emerged in this process a conglomeration of daily life services, making Tunxi a place of convenience-cure-prosperity. Thus, a combination of both historical and geographical factors can help in no small way to offer a better explanation of the urban development of Tunxi as a tea trade centre in imperial China. 展开更多
关键词 Tunxi HUIZHOU Tea trade Tea-related agglomeration Daily lifeservices
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