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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)。
This article describes a chemical testing technique for measuring the flow rate with salt concentration method by taking a certain volume of standard mixture with a known dilution factor (R+) and measuring the millilitres b of AgNO_3 solution required for complete precipitation of Cl~-. Determine the number of AgNO_3 ml (a) required for raw water, calculate (ca) from (R+1)(ba), and regress (ca) with (ba) to obtain an intercept with A and a slope of B. The regression equation is (ca)’=A+B(ba). Then, the b value of ANO_3 required for the unknown dilution dilution is measured, and the (ba) value is substituted into the obtained regression equation to find the (ca)’ value, and (ca)’/(ba) can be used. The dilution of this mixture was determined. The dilution ratio measured by this technique is quite accurate, and the dilution factor can be quickly calculated with a scientific calculator. Once the flow of the infusate is measured, the total flow (QP) of the pump can be calculated using (R+1)’q.