Measurement of TOC in Bottled Mineral Water and Raw Water by TOC

Introduction

Water is used in large quantities to man ufacture soft drinks, bottled miner al w ater, beer and other dr inks. The quality of the r aw water has a major influence on the quality of the man ufactured products . It is stipulated in rele vant standards that the w ater used in food products shall be “suitable f or dr inking.” If drinking w ater is used as the r aw w ater it is not required to chec k the w ater quality because dr inking water is already recogniz ed as “suitable f or dr inking.” Manufacturers of f ood products are chec king and controlling the quality of the raw material water as part of quality control of their products or oper ation control of their production processes (as par t of quality assurance in case of ISO9001 accredited manufacturers). The w ater quality standard of the J apanese Water Works La w w as re vised in Apr il 2005. The re vision specifies that the content of total organic carbon (TOC), not the potassium permanganate consumption, shall be used to deter mine the quantity of organic substances in dr inking w ater. No w the measurement of organic substances in raw water and drink products can be done using TOC analyz er in accordance with the Japanese Water Works Law provision. Here w e introduce an e xample of using the Total Organic Carbon Analyzer TOC-V_CSH to analyze bottled mineral water and raw water (well water).

October 13, 2005 GMT