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标准物质(RM)reference material(RM)：是一种已经确定了具有一个或多个足够均匀的特性值的物质或材料，作为分析测量行业中的“量具"，在校准测量仪器和装置、评价测量分析方法、测量物质或材料特性值和考核分析人员的操