HJ 550-2015 (HJ550-2015)

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HJ 550-2015	English	229	Add to Cart	3 days [Need to translate]	Water quality. Determination of cobalt. 5-Cl-PADAB Spectrophotometry	HJ 550-2015	Valid	HJ 550-2015

HJ 550-2015
Water quality.Determination of cobalt.5-Cl-PADAB Spectrophotometry
National Environmental Protection Standard of the People 's Republic of China
Replacing HJ 550-2009
Determination of water quality Cobalt 5-chloro-2- (pyridylazo)
-1,3-diaminobenzene spectrophotometry
Water quality-Determination of cobalt
-5-Cl-PADAB Spectrophotometry
2015-04-03 released
2015-07-01 implementation
Ministry of Environmental Protection released
I directory
Preface II
1 Scope of application
2 normative reference documents
3 Terms and definitions 1
4 Principle of the method
5 interference and elimination
6 reagents and materials 2
7 instruments and equipment 3
8 Sample 3
9 Analysis steps
The results are calculated and expressed
11 Precision and Accuracy
12 Quality assurance and quality control
13 Waste treatment .5
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,
Protect the human health, regulate the monitoring method of cobalt in water, the development of this standard.
This standard is a measure of the determination of total cobalt by 5-chloro-2- (pyridylazo) -1,3-diaminobenzene spectrophotometry (provisional)
(HJ 550-2009).
This standard was first published in.2009, this time for the first revision, this revision mainly on the scope of application of the method,
Methodology, Interference and Elimination, Reagents and Materials, Instruments, Samples, Analytical Steps, Results Calculations and Representations, Precision
Degree and accuracy of the contents of the re-provided. Added normative references to documents, terms and definitions, quality assurance and quality
Control and so on.
From the date of implementation of this standard, "Determination of total cobalt water 5-chloro-2- (pyridylazo) -1,3-diaminobenzene spectrophotometry
(Provisional) "(HJ 550-2009).
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.
The standard verification unit. Chaoyang District, Beijing Environmental Protection Monitoring Station, Yanqing County Environmental Protection Monitoring Station, Tsinghua University Ring
Environmental quality testing center, Beijing Kangju environmental testing station, Beijing China measured North Detection Technology Co., Ltd., Beijing Environmental Protection
Monitoring center.
This standard is approved by the Ministry of Environmental Protection on April 03,.2015.
This standard has been implemented since July 1,.2015.
This standard is explained by the Ministry of Environmental Protection.
- 1 -
Determination of water quality Cobalt 5-chloro-2- (pyridylazo)
1,3-diaminobenzene spectrophotometry
1 Scope of application
This standard specifies the determination of dissolved cobalt and total cobalt in water 5-chloro-2- (pyridylazo) -1,3-diaminobenzene spectrophotometry
law.
This standard applies to the determination of cobalt in surface water, industrial waste water and domestic sewage.
When the sampling volume of 20.0ml, the detection limit of 0.009mg/L, the determination of the lower limit of 0.036mg/L, determination of the upper limit
Is 0.500mg/L.
2 normative reference documents
The contents of this standard refer to the terms of the following documents. For those who do not mind the date of the reference file, the valid version applies
In this standard.
Technical specification for surface water and wastewater monitoring
3 terms and definitions
The following terms and definitions apply to this standard.
3.1 dissolved cobalt
Refers to cobalt that has not been acidified after passing through a 0.45 μm pore size filter.
3.2 Total Cobalt
Refers to the sum of the cobalt in two parts of the dissolved and suspended phases of the sample, as measured by the unfiltered sample.
4 principle of the method
Cobalt is reacted with 5-chloro-2- (pyridylazo) -1,3-diaminobenzene (5-Cl-PADAB) to form a m