食盐浓度法测流的化学测试技术

本文介绍了用食盐浓度法测流的化学测试技术,方法是取已知稀释倍数(R+)的一定体积的标准混合液,并测出完全沉淀Cl~-所需AgNO_3溶液的毫升数b,再测出原水所需的AgNO_3毫升数(a),由(R+1)(b-a)求出(c-a),将(c-a)同(b-a)进行回归,得到具有截距为A和斜率为B的回归方程,即(c-a)′=A+B(b-a)。然后,把未知稀释倍数的混合液所需的A NO_3的b值测出来,并将(b-a)值代入得到的回归方程求出(c-a)′值,用(c-a)′/(b-a)即可求出该混合液的稀释倍数。本技术测得的稀释倍数相当准确,用科学计算器可迅速计算出稀释倍数。注入液的流量一经测出即可用(R+1)′q计算出泵的总流量(QP)。

A Chemical Testnig Technique of Liquid Flow Measurement by Using Brine Concentration Method

The chemical te ting technique of liquid flo measurement by brine concentration method is described in this paper. The method is to take a certain volume of standard mixtu e of the known foll number of dilution, detesmine the millil■ters cf AgNO_3 sclution (■enoted by b) required for complete precipitation of chloride ior, and also determi■e the milliliters of AgNO_3 solution ('e■o' ed by a) requined for original ■a e■. The alue of (c-a)is calcula■el from (■+1)(b-a), and then regie ■(c-a)■ith(b-a), we can obtain the line■eg■ession equation with the inte cept A and the ■l pe B, viz (c-a)'=A+B(b-a). Subsequen■ly, the value b of Ag O_3 solution required for the mix ure of the unknown fold number of dilution is determined, and the value of(b-a)is substiiuted into the regression equation just obtained to calculate the value (c-a)'. We can calculate the fold number of dilution of the mixture by (c-a)'/(b-a).The fold number of dilution determined by this technique is very accurate, and the calculation of the fold number of dilution is quick by using a rcientific ca■calator. As soon as the flow of injection liquid (q) is measured, the total flow of pimp (Q_p) can be ca culated by (R+1)'q.