After samples were derived by BSTFA, GC-MS took metoprolol as the internal standard substance and made a qualitative and quantitative test.
样品经双甲基硅烷三氟乙酰胺衍生后，以美托洛尔为内标物，用气相色谱-质谱联用仪进行定性定量分析。
As and ar in the formula are peak area or peak height of internal standard substance and reference substance, Cs and CR are density of internal standard substance and reference substance separately.
式中as和AR分别为内标物质和对照品的峰面积或峰高，Cs和CR分别为内标物质和对照品的浓度。
After the sample is analyzed, the response to the unknown concentration is compared to the internal standard and an accurate measurement of the concentration of the substance of interest is obtained.
未知物质的浓度可根据测试结果与浓度经过标准地、精确测量的物质相比较而得出。
This may be due to one more volatile substance as internal standard resulting in the rapid uniform distribution of samples partial pressure in the injection chamber.
这可能是由于双内标可使样品分压在进样室快速均匀分布所致。
This may be due to one more volatile substance as internal standard resulting in the rapid uniform distribution of samples partial pressure in the injection chamber.
这可能是由于双内标可使样品分压在进样室快速均匀分布所致。
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