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2002年笔者随机选取广阳区、霸州市、文安县3个县(区、市)为区域代表,随机抽取了240份食盐样品进行了碘含量的检测。 1 材料与方法 1.1 材料:采取随机抽样的方法,采集广阳区、霸州市、文安县居民户食盐240份。 1.2 检测方法:按GB/T13025-1999方法进行碘含量测定。
In 2002, the author randomly selected three counties (districts and cities) in Guangyang, Bazhou and Wen’an counties as regional representatives, and randomly selected 240 salt samples for iodine content detection. 1 Materials and Methods 1.1 Materials: A random sampling method was used to collect 240 household salt from households in Guangyang, Bazhou and Wen’an. 1.2 Detection: According to GB / T13025-1999 method for determination of iodine content.