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Cannot be used except for measurement of residual chlorine concentration in the aqueous solution of sodium hypochlorite. This test paper is utilizing the change in pH, if it contains what makes a half or a pH other than sodium hypochlorite in the solut
Standard Discoloring Table Interval
25, 50, 100, 200
Measurement Range (ppm)
25 - 200
Research, development, quality control, water quality analysis