基准物质(primary standard)是分析化学中用于直接配制标准溶液或标定滴定分析中操作溶液浓度的物质。基准物质的定义越来越准确,分类明确,在许多领域有着重要的作用。
在滴定分析中,能直接配制的物质称为基准物质(primary standard substance),按字面意思直译又可称为一级标准物质。纯度要求至少A.P.
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基准物质(standard chemicals)是一种高纯度的,其组成与它的化学式高度一致的化学稳定的物质(例如一级品或纯度高于一级品的试剂)。
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原始基准物质 primary standard substance
常用的基准物质 Common Primary Standards
基准标准物质 Primary Reference Material ; PRM
乙基汞溶液标准物质 Ethylnercury Solution ; Ethylmercury Solution
甲基汞溶液标准物质 Methylmercury Solution
一甲基砷溶液标准物质 Monomethylarsonic acid in water ; Monmethylarsonic Acid Solution
硝基苯溶液标准物质 Nitrobenzene in methanol
二甲基砷溶液标准物质 Dimethylarsinic acid in water
三丁基锡溶液标准物质 Tributyltin in methanol
用多种基准物质绘制了不同柱长的校正曲线,证明了新方法的可靠性。
Calibration curves were drawn with some standard substances, so the reliability of the new method established in the paper is proved.
同时也指出了火电厂主要固体污染物的基准物质及其基准浓度的确定方法。
Meanwhile, the method to determine the standard substances and its benchmark concentrations of the main solid pollutions of the thermal power plant are discussed.
习惯上人们认为,特定的分析方法应通过参考物质建立到基准方法的计量溯源性。
It is believed traditionally that specified analysis methods should have a metrological traceability to primary method through reference materials.
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