Standard No.:	GB/T 12157-2007
English Name:	Water for industrial circulating cooling system and boiler—Determination of dissolved oxygen
Chinese Name:	工业循环冷却水和锅炉用水中溶解氧的测定
Chinese Classification:	G76    Basic standards and general methods for water treatment agent
Professional Classification:	GB    National Standard
ICS Classification:	71.040.40 71.040.40    Chemical analysis 71.040.40
Issued by:	AQSIQ; SAC
Issued on:	2007-10-17
Implemented on:	2008-2-1
Status:	abolished
Superseded by:	GB/T 12157-2022 Determination of dissolved oxygen in water for industrial circulating cooling system and boiler
Superseded on:	2022-10-1
Abolished on:	2022-10-01
Superseding:	GB/T 12157-1989 GB/T 15455-1995 Industrial circulating cooling water－Determination of dissolved oxygen－Iodimetry GB 12157-1989 Analysis of water used in boiler and cooling system-Determination for dissolved oxygen-Internal electrolysis
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

This Standard specifies a method for the determination of dissolved oxygen in water for industrial circulating cooling system, boiler water and coagulated water. The iodometric method in this Standard is applicable to the determination of dissolved oxygen in water for industrial circulating cooling system which having dissolved oxygen concentrations greater than 0.2 mg/L, up to 8 mg/L (the content of oxygen). The internal electrolysis method in this Standard is applicable to the determination of dissolved oxygen in boiler water and coagulated water which having dissolved oxygen concentrations greater than 2 μg/L, up to 100 μg/L (the content of oxygen).