Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan
Online ISSN : 2424-0486
Print ISSN : 0385-275X
ISSN-L : 0385-275X
Study on Measuring Method of Free Residual Chlorine Concentration by DPD Method and SBT Method in Bath Water
Hitoshi AKAI, Fumitoshi KIYA, Seishi OKADA, Noriyoshi ICHIKAWA, Tamotsu TAKAYANAGI, Katsuhiko NAKAMURA, Kohichi KUDOH, Takashi IKEGAMI
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Keywords: Theoretical Analysis, Actual Measurement, Bath Water, Free Residual Chloride Concentration, Colorimetric Assay Method, Absorptiometric Method
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2007 Volume 32 Issue 122 Pages 1-7

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Abstract
Recently there have been a lot of accidents by Legionella disease originated in bath water. It is very important matter as measures for Legionella disease to control free residual chlorine concentration exactly. In this report, it is examined that the different value of measurement of free residual chlorine concentration between usage of these two reagents, DPD (N,N-Diethylphenylene-diamine) and SBT (Sulfo-benzyl-tolidine), in terms of its chemical structure, oxidation reduction potential and the results of measuring in bath water.
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© 2007 The Society of Heating,Air-Conditioning and Sanitary Engineers of Japan
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