Serim® GUARDIAN™ RESIDUAL PEROXIDE Test Strips provide a rapid and convenient means for measuring the concentration of peroxide remaining in dialysate lines and dialyzers after disinfection with peracetic acid/peroxide-based disinfectants (such as Renalin®, Actril®, Minncare®, Puristeril®340, Peracidin®, PerAldecide™ and Micro-X®).