The invention provides an automatic test method and instrument for modules of
sodium silicate, so as to solve the problems that in the existing measuring method, naked eyes are adopted to judge the
titration end point, the measuring precision is low, and the manual operation is adopted,
back titration is required to be carried out on
sodium hydroxide solution in the measuring process, and the test cycle is longer. In the invention, an
electric potential signal collected by a pH
electrode is adopted to replace the naked eyes to judge the
titration end point, manual liquid-adding
titration is replaced by accurate liquid-adding titration carried out by an accurate liquid-adding titration apparatus, a processor is adopted to control the titration process and
processing data, and a magnetic force heating stirrer is adopted to heat and stir in the whole measuring process. The instrument in the invention consists of a liquid-adding titration unit, a reaction unit, a
signal acquisition amplifying unit, a
data processing unit and a result output unit. By utilizing the method and instrument provided by the invention, rapid and accurate measurement of modules of the
sodium silicate is realized, and the labor intensity of experimenters is alleviated.