SteriChek® Residual Chlorine Test StripsTests for residual chlorine in rinse water to 0. 5 ppm (mg l). Provides a convenient, accurate means of measuring the concentration of chlorine bleach remaining in water being used to rinse out dialysate lines following disinfection of hemodialysis equipment. A rapid screening method will detect levels above 0. 5 ppm (mg l) and a 30 second quantitative method allows estimation of concentrations between 0 and 5 ppm. The qualitative rapid screening