internal label

• 内标

internal label的用法和样例：

例句

1. Weakness of trace impouring imprecisely was avoided by mixing UDMH and internal standard solution.
   用内标与偏二甲肼混合样品，避免了微量进样不准确的缺陷。
2. Besides, quantitation analysis of involatile compositions in beer could be done by internal standard method or by external standard method.
   还可用内标法和外标法对啤酒中的不挥发组分进行定量检测分析。