【摘要】 本文报导环境标准物质茶叶、茶树叶的制备和均匀度的评价。茶叶和茶树叶采集于陕西黄家山茶园,样品经过空气干燥、研磨、过60目筛、混匀和装瓶等步骤处理,然后用钴60照射灭菌(2Mrd)。照射后的样品随机抽样采用中子活化和原子吸收分析方法,测定其中,Zn,Cu,Fe,Mn,Ca,K,Al,S和P等元素的含量,测定结果用F和t检验法处理,结果表明样品的均匀度达到标准物质的要求。更多还原

【Abstract】 The preparation and homogeneity assessment of tea and tea leaves standard reference materials are reported.The tea and tea leaves for tea reference materials were collected from tea garden (Huangjia Shan, Shanxi). The collected materials were air dried, ground sieved to pass a 60 mesh screen, blended and bottled. Then all bottles were sterilized by Co-60 radiation (2M rad).The homogeneity-assessment was tested by determining the contents of some elements (Zn. Cu, Fe, Mn, Ca. K. Al. S. and P) by X-ray floures-cence analysis and atomic absorption spectrometry By applying F and t testes it was indicated that the prepared tea and tea tree leaves satisfies the homogeneity criteria for a reference material.更多还原