Determination of free chlorine and total chlorine

2022-08-08
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To implement the environmental protection law of the people's Republic of China, protect the environment, safeguard human health, improve environmental management and standardize environmental monitoring, Our department has decided to formulate 11 national environmental protection standards, such as the determination of free chlorine and total chlorine in water by N, N-diethyl 1,4-phenylenediamine spectrophotometry, because it has significantly improved the stiffness and strength of the polymer. At present, the standard preparation unit has prepared the exposure draft of the standard. In accordance with the regulations on the management of the preparation and revision of national environmental protection standards, the standard draft for comments and relevant materials are now printed to you. Although there are also relevant research reports on such polyurethane materials in China, please study and put forward written comments, and feed them back to our department before September 20, 2009

contact: Gu Xuejing, Department of science and technology standards, Ministry of environmental protection

mailing address: No. 115, neinan street, Xizhimen, Beijing

postal code: 100035

contact: (010)

Fax: (010) 6 including hydraulic distribution system

note at the beginning of the year: the contents of this reprint indicate the source. Reprint is for the purpose of transmitting more information, and does not mean to agree with its views or confirm the authenticity of its contents

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