determination of total base的意思|示意

Objective: to compare the two methods of content determination for total alkaloids in Tonkin Sophora root. Method: acid base titration and colorimetric method of acid dye were used.

前言：目的：比较山豆根总碱两种含量测定方法，为山豆根提取工艺优选提供参考。

China's first census in 10, five-year one percent population sampling survey (called on the census), due to China's great population base, the determination of the total fertility rate is never easy.

我国10年一次人口普查，五年一次1%人口抽样调查(人称小普查)，由于我国人口基数极大，对于总和生育率的确定绝非易事。