Method for producing chlorine residue test paper

Abstract

The present invention relates to the production process of chlorine residue test paper with tetraalkyl benzidine, especially 3,3',5,5'-tetramethyl benzidine as color-developing agent. THe production process includes the steps of: compounding the soaking solution with tetraalkyl benzidine, volatile solvent and weak acid regualting agent; soaking test paper in the solution; air drying at 60 deg.c; stoving and cutting the test paper into small sheets; and adhering the sheets to base. The test can resist the pH developing effect in wide range, may be grade into 0,1,2,3,5,10 ppm grades. Being fast and stable in development, the test paper is used in the detection of disinfectant content in swimming pool.

Description

(1) Technical field [0001] What the present invention relates to is a kind of use tetraalkylbenzidines, especially with 3,3 ', 5,5 '-tetramethylbenzidine (TMB) is the manufacture method of the residual chlorine test paper of color developer. (2) Background technology [0002] At present, there are multiple residual chlorine test papers at home and abroad. As No. CN4055240A patent application announced is a kind of chelate (colorless) utilizing polyvinylpyrrolidone and potassium iodide and after the effective chlorine effect of different concentrations, can produce the chelate of polyvinylpyrrolidone and iodine, its The color of the chelate is proportional to the concentration of available chlorine, the color scale transitions from yellow to brown, its test range is 10-50000ppm, and the color scale grades are 50, 100, 150, 200, 300, 500, 1000, 2000ppm. The CN1286402A patent application discloses a residual chlorine test paper using N,N-diethyl-p-phenylenediamine (DPD) as a c...

AI Technical Summary

Problems solved by technology

Obviously, the common problem of the above-mentioned technologies is that the detection range is too large and insensitive