CHLORINE ANALYTICAL TEST ELEMENT AND A STABILIZED N, N-DIETHYL-P-PHENYLENEDIAMINE SOLUTION

摘要

A test element (10) used to determine concentration levels of free and total chlorine in a water sample comprises a test pad (12) adhered to a substrate (14), wherein the test pad (12) is impregnated with a stabilized DPD solution. The test pad (12) is color responsive to different concentration levels of chlorine in the water and compared to a color chart to determine the level of free chlorine and/or total chlorine in the water. The stabilized DPD solution may include N,N-diethyl-p-phenylenediamine oxalate salt, a polymeric anhydride such as a methyl-vinyl anhydride and an organo-sulfate such as dimethyisulfone.

主权项

1. A test element for detecting concentration levels of chlorine in water comprising:
a substrate for securing a test pad to and being adapted for human handling; a test pad secured to the substrate that is impregnated with a dried solution comprising a phenylenediamine salt, an oxidation inhibitor and an organo-sulfur compound; and wherein when wetted with a water sample, the test pad is color responsive, to chlorine species in said water sample indicative of concentration levels of free and/or total chlorine in the water.