内标物，将一个已知质量，样品中不含有杂质的纯物质，加入至待测样品溶液中，以此纯物质的量为标准，对比测定待测组分的含量，该纯物质称为内标物。
... 环境标准物质;environmental standard material 标准;standard 内标物;internal standard substances ...
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对分离条件、内标物选择进行了试验和讨论。
Tests and discussion are held on the separation conditions and contents.
对色谱柱、柱温、内标物、标准样等色谱分离条件的选择进行了探讨。
Selection of gas chromatography separate - conditions, such as column, temperature, internal standards, and reference samples, are probed.
以邻苯二甲酸二丁酯为内标物，测定了DCPCP对内标物的相对质量校正因子。
The dibutyl o phthalate was used as internal standard and the relative mass correction factor of DCPCP was determined.
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