external standard method meaning in English

外标法

Electron balance has been used to measure volume of solution put in by pipette of standard series in external standard method
摘要研究了用电子天平对外标法标准系列配制过程中吸管加入溶液体积进行计量的方法。
Diesel oil in soil was determined quantitatively by gas chromatography - mass spectrometry with external standard method after ultrasonic extraction . the method is accurate and simple
摘要对土壤中的柴油，用超声萃取法进行处理，利用气相色谱质谱仪进行分析，采用外标法进行了定量测定。方法准确度高，简便可行。
As precise control of incoming sample amount is hard when using microinjector , it is better to use quantitative ring or auto - sampler to take samples when using external standard method to measure content of a certain impurity or main component of the test samples
由于微量注射器不易精确控制进样量，当采用外标法测定供试品中某杂质或主成分含量时，以定量环或自动进样器进样为好。
5 . detection : the samples were extracted with ethyl ether . the lidocaine in the sample was qualitated by rf and a tlc scanning spectrometry , quantitated by a tlc scanning chromatography and a two points external standard method or a standard curve method
5 、利多卡因检测方法:样品碱化处理后，乙醚提取，薄层扫描检测，根据利多卡因的rf值结合光谱扫描图定性，外标两点法或标准曲线法定量。