HJ 551-2016 (HJ551-2016)

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HJ 551-2016	English	169	Add to Cart	3 days [Need to translate]	Water quality-Determination of chlorine dioxide and chlorite-Continuous iodometric method	HJ 551-2016	Valid	HJ 551-2016

HJ 551-2016
Water quality-Determination of chlorine dioxide and chlorite-continuous iodometric method
National Environmental Protection Standard of the People 's Republic of China
Replacing HJ 551-2009
Water quality - Determination of chlorine dioxide and chlorite
Continuous titration iodometric method
Water quality-Determination of chlorine dioxide and chlorite-
Continuous iodometric method
2016-05-13 release
2016-08-01 implementation
Ministry of Environmental Protection
Directory
Preface ..ii
1 Scope of application
2 Principle of the method
3 interference and elimination
4 reagents and materials 1
5 instruments and equipment 2
6 Sample 3
7 Analysis steps
8 results are calculated and expressed
9 precision
10 quality assurance and quality control
11 Waste treatment
12 Precautions .4
Preface
In order to implement the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on the Prevention and Control of Water Pollution,
Protection of human health, regulate the determination of chlorine dioxide and chlorite in wastewater, the development of this standard.
This standard specifies the continuous titration iodometric method for the determination of chlorine dioxide and chlorite in industrial wastewater dyeing and finishing industry.
This standard is a revision of the "Determination of Chlorine Dioxide in Water Quality (Temporary)" (HJ 551-2009).
This standard was first published in.2009, the original standard drafting unit for the Beijing Environmental Protection Monitoring Center. This is the first
The main contents of the amendment are as follows.
- revised standard name, scope of application, chlorine dioxide method detection limit, precautions;
- revised the standard solution of sodium thiosulfate standard solution and potassium iodate standard solution, the removal of potassium dichromate calibration method;
- the lower limit of the determination of chlorine dioxide, the detection limit of chlorite and the lower limit of determination;
- increased interference and elimination, sample determination time and environmental conditions, precision, quality assurance and quality control,
Waste treatment.
Since the implementation of this standard, the original standard "Determination of chlorine dioxide in water quality iodine method (provisional)" (HJ 551-2009)
Abolished.
This standard is organized by the Ministry of Environmental Protection Science and Technology Standards Division.
The drafting of this standard. Beijing Environmental Protection Monitoring Center, Beijing Shijingshan District Environmental Protection Monitoring Station.
The standard verification unit. Beijing Xicheng District Environmental Protection Monitoring Station, Beijing Kangju Environmental Inspection Station, Qingdao City Environment
Monitoring center station, Qingdao Environmental Protection Bureau Laoshan Branch monitoring station, Beijing Chaoyang District Environmental Protection Monitoring Station, Beijing Yanqing District
Environmental protection monitoring station, Beijing Shijingshan District Environmental Protection Monitoring Station, Beijing Environmental Protection Monitoring Center.
The environmental protection department of this standard approved on May 13,.2016.
This standard has been implemented since August 1,.2016.
This standard is explained by the Ministry of Environmental Protection.
Water quality - Determination of chlorine dioxide and chlorite - Continuous titration of iodine method
1 Scope of application
This standard specifies the continuous titration iodometric method for the determination of chlorine dioxide and chlorite in industrial wastewater dyeing and finishing industry.
This standard applies to the use of sub-bleaching process of textile dyeing and finishing industry emissions of chlorine dioxide and chlorite determination.
When the sampling amount was 150 ml, the detection limit of chlorine dioxide was 0.09 mg/L and the lower limit was 0.36 mg/L.
The detection limit of chlorite (based on chlorite) was 0.08 mg/L and the lower limit was 0.32 mg/L.
2 principle of the method
Chlorine dioxide and