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本法的优点有三:(一)一般分析方法多采用一种或几种试剂,破坏燃料中四乙基铅,再将萃出之无机铅用重量法或容量法测定,手续复杂费时;而本法手续简便迅速,进行一个样品的二次平行测定只需15—25分钟,远非铬酸盐法、硫酸盐法或钼酸盐法等可比。而实验结果,在苏联国定试验方法(ГОСТ5337—50)误差范围之内。(二)目前分析航空汽油中的四乙基铅,多采用钼酸盐法、该法主要缺点之一,系以单宁为外指示剂,颇多不便;而本法以淀粉溶液为指示剂,滴定时可得显明的终点。(三)药品消耗较少,切合国家节约原则。
There are three advantages of this law: (a) the general method of analysis using one or more reagents to destroy the tetraethyl lead in the fuel, then the extracted inorganic lead by gravimetric method or volumetric method, the procedure is complex and time-consuming; French procedure is simple and rapid, the second parallel determination of a sample takes only 15-25 minutes, far more than chromate method, sulfate method or molybdate method comparable. The experimental results, in the Soviet Union’s national test method (ГОСТ5337-50) error range. (B) the current analysis of aviation gasoline in the tetraethyl lead, the more use of molybdate method, one of the major drawbacks of the law, Department of tannins for the external indicator, a lot of inconvenience; and the law of starch solution as an indicator , Titration can be a clear end point. (C) less drug consumption, in line with national conservation principles.