Measurement of TOC in Chloroisocyanuric Acid using the TOC-VCSH

Introduction

By the amendment of the water quality standard of the drinking water regulations, from April 1, 2005, the potassium permanganate consumption quantity as the organic matter index will be changed to total organic carbon (TOC). in conjunction with this, there is a tendency that TOC is used as an index of organic matter concentration in not only drinking water but also pool water, spring water, bath water, etc. To sterilize pool water, etc., in place of conventionally used sodium hypochlorite solution, powdered chloroisocyanuric acid (dichloroisocyanuric acid, trichloroisocyanuric acid), with little chlorine deactivation, are now experiencing wider use. Because oxidative decomposition of this chloroisocyanuric acid does not progress well using the wet chemical oxidation type TOC analyzer, detection is difficult. However, using the combustion type TOC analyzer, measurement can be conducted with good sensitivity. Introduced here is an example of analysis of chloroisocyanuric acid using the Shimadzu combustion type total organic carbon analyzer TOC- V_CSH.

October 19, 2004 GMT