the quantitative determination

The methods of the qualitative identification and the quantitative determination can be used for quality control because of their convenience, accuracy and good reproducibility.

方法简便， 专属性强，重现性好，可作为本品的质量控制标准。

The test showed that both methods were suitable for the quantitative determination of residual lactic acid and water in lactide, they were simple, convenient and easily applicable.

实验表明，这两种方法可分别定量测定丙交酯中残存乳酸和水，且简捷实用。

The quantitative determination of 70% bismuth in silicon-bismuth samples were completed by line width method. The relative error is less than 7.15%, the relative standard deviation is 5.85%.

用谱线宽度方法定量检测了硅铋样品中含量为70%的铋， 相对误差小于7.15%，相对标准偏差为5.85%。