富硒茶叶中硒含量的检测及相关标准的分析探讨

Determination of selenium in selenium-enriched tea and analysis of related standards

中文关键词:  富硒茶  硒含量  标准

英文关键词:rich-selenium tea  selenium content  standard

中文摘要:

      目的 检测富硒茶叶的总硒含量, 剖析硒含量和标示值存在的问题, 梳理富硒茶的相关标准, 总结潜在质量安全监管问题。方法 采用微波消解法处理样品, 利用氢化物原子荧光光谱法测定富硒茶样品的硒含量, 分别与普通茶叶测定值和产品标示值进行对比分析。梳理了食品中硒的国家标准和富硒茶相关的地方标准、行业标准, 指出了富硒茶产业关键标准的缺陷可能导致潜在的质量安全问题。结果 富硒茶存在硒含量太低、达不到行业标准要求的问题, 产品标示值不准确、不规范。富硒茶产业发展迅速, 但其质量问题未引起足够重视, 关键技术规范和国家标准缺失, 对其质量监测的检验和评估仍不足。结论 富硒茶相关的标准不统一, 尚缺乏国家标准的规范。应尽快制定相关的国家标准, 加大对该产业的监管力度, 保证人们饮用健康。

英文摘要:

      Objective To determine the total selenium in selenium-enriched tea sample, find out the problems about the selenium content and its labeling value, analyze the current standards related to selenium-riched tea and reveal the potential quality safety problems. Methods The tea samples were pretreated with microwave digestion, and the selenium content in selenium-enriched tea samples were determined by hydride generation atomic fluorescence spectrometry. The results were compared with common tea and their labeling values, respectively. Meanwhile, the industry standards and local standards about selenium-riched tea products were analyzed and the potential quality and safety problems that resulted from the absence of key national standard were pointed out. Results The actual selenium content in some selenium-enriched tea were too low and could not meet the related requirement in industry standards. The labeling values of some selenium-rich tea were inaccurate and irregular. Selenium-enriched tea industry had developed rapidly, but the quality problems had not attracted enough attention. The key technical specifications and national standards were missing, and the inspection and evaluation of quality monitoring of selenium-riched tea were still insufficient. Conclusion The standards about selenium-enriched tea are not uniform and the national standards are absent. So relevant national standards should be established as soon as possible, and the regulation should be enhanced to protect people's health.