National Standard Substances
National Standard Substances-
The detection of standard human hair sample ( GBW09101 ) provided by National Standard Substances Center showed the results were all within the acceptable range ;
对国家标准物质中心的人发样（GBW09101）进行平行测定，结果均在规定范围内；
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The determined results accord with those of national first grade standard substances and the RSD is less than 5 % .
对国家一级铀矿石标准物质进行了测定，结果与推荐值吻合，精密度＜5%。