HJ 586-2010 English PDF

HJ 586-2010_English: PDF (HJ586-2010)
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
HJ 586-2010419 Add to Cart 3 days Water quality. Determination of free chlorine and total chlorine. Spectrophotometric method using N, N-diethyl-1, 4-phenylenediamine Valid

BASIC DATA
Standard ID HJ 586-2010 (HJ586-2010)
Description (Translated English) Water quality. Determination of free chlorine and total chlorine. Spectrophotometric method using N, N-diethyl-1, 4-phenylenediamine
Sector / Industry Environmental Protection Industry Standard
Classification of Chinese Standard Z16
Classification of International Standard 13.060.01
Word Count Estimation 16,161
Date of Issue 2010-09-20
Date of Implementation 2010-12-01
Older Standard (superseded by this standard) GB/T 11898-1989
Quoted Standard GB/T 5750.10; GB/T 5750.11
Drafting Organization Dalian Municipal Environmental Monitoring Center
Administrative Organization Ministry of Environment Protection
Regulation (derived from) Department of Environmental Protection Notice No. 68 of 2010
Summary This standard specifies the determination of free chlorine and total chlorine spectrophotometry. This standard applies to surface water, industrial waste, medical waste, sewage, water and sewage water for regeneration of the landscape of free chlorine and total chlorine. This standard does not apply to determination of turbidity or color higher than the water samples.


HJ 586-2010 Water quality.Determination of free chlorine and total chlorine.Spectrophotometric method using N, N-diethyl-1, 4-phenylenediamine National Environmental Protection Standard of the People's Republic Replace GB 11898-89 Determination of free chlorine and total chlorine in water N,N-diethyl-1,4-phenylenediamine spectrophotometry Water quality-Determination of free chlorine and total chlorine- Spectrophotonetric method using N,N-diethyl-1,4-phenylenediamine Released on.2010-09-20 2010-12-01 Implementation Ministry of Environmental Protection released Ministry of Environmental Protection announcement No. 68 of.2010 In order to implement the "Environmental Protection Law of the People's Republic of China", protect the environment, and protect human health, we now approve the "environmental air benzene series" Five standards, such as solid adsorption/thermal desorption-gas chromatography, are considered as national environmental protection standards and are released. The standard name and number are as follows. I. Determination of Benzene in Ambient Air Solid Adsorption/Thermal Desorption-Gas Chromatography (HJ 583-2010); 2. Determination of Benzene in Ambient Air Activated Carbon Adsorption/Carbon Disulfide Desorption - Gas Chromatography (HJ 584-2010); 3. Determination of free chlorine and total chlorine in water, N,N-diethyl-1,4-phenylenediamine titration method (HJ 585-2010); V. "Determination of water quality atrazine by high performance liquid chromatography" (HJ 587-2010). The above standards have been implemented since December 1,.2010 and published by the China Environmental Science Press. The standard content can be found on the website of the Ministry of Environmental Protection. From the date of implementation of the above standards, the following four national environmental protection standards approved and issued by the former National Environmental Protection Agency shall be abolished. The name and number are as follows. I. Determination of Air Quality, Toluene, Xylene and Styrene by Gas Chromatography (GB/T 14677-93); 2. Determination of Air Quality Styrene by Gas Chromatography (GB/T 14670-93); 3. Determination of free chlorine and total chlorine in water. N,N-diethyl-1,4-phenylenediamine titration method (GB 11897-89); 4. Determination of free chlorine and total chlorine in water quality N,N-Diethyl-1,4-phenylenediamine spectrophotometric method (GB 11898-89). Special announcement. September 20,.2010 Content Foreword..iv 1 Scope..1 2 Normative references..1 3 Terms and Definitions.1 4 principle of the method..2 5 interference and elimination. 2 6 reagents and materials. 2 7 instruments and equipment.4 8 samples.4 9 Analysis steps..4 10 Results calculation and representation 5 11 Precision and Accuracy 6 12 Quality Assurance and Quality Control.6 13 Notes 6 Appendix A (Normative) Determination of free chlorine and total chlorine in water - Determination of N,N-diethyl-1,4-phenylenediamine. Appendix B (Normative) Determination of three forms of combined chlorine in the form of monochloramine, dichloramine and nitrogen trichloride 10 Iv Foreword To protect the environment and protect the human body 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 Water Pollution Prevention and Control This standard is developed for the determination of free chlorine and total chlorine in water. This standard specifies the determination of free water in landscape water for the determination of surface water, industrial wastewater, medical wastewater, domestic sewage, water and sewage. N,N-Diethyl-1,4-phenylenediamine spectrophotometry and on-site determination of chlorine and total chlorine. This standard is for the determination of free chlorine and total chlorine in water. N,N-Diethyl-1,4-phenylenediamine spectrophotometry (GB 11898-89) Revision. This standard was first published in 1989. The original standard was drafted. Anhui Environmental Monitoring Center, China Academy of Preventive Medicine Environmental Health Health Monitoring Institute and Anhui Wuhu Environmental Monitoring Center Station. This is the first revision. The main contents of the revision are as follows. - Revised the scope of application of the method; -- Increased the preservation method of the sample and modified the amount of buffer solution added; - Adjusted the measurement wavelength; -- Increased the low concentration calibration curve and reduced the detection limit of the method for determining free chlorine and total chlorine in surface water; -- Added precautionary clauses; -- Added on-site measurement methods for free chlorine and total chlorine. From the date of implementation of this standard, the national environmental protection standard “Water” approved and issued by the former National Environmental Protection Agency on December 25, 1989 Determination of free chlorine and total chlorine N,N-diethyl-1,4-phenylenediamine spectrophotometry (GB 11898-89) abolished. Appendix A and Appendix B of this standard are normative appendices. This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection. This standard is mainly drafted by. Dalian Environmental Monitoring Center. This standard is verified by. Liaoning Provincial Environmental Monitoring Experimental Center, Anshan Environmental Monitoring Center, Yingkou Environmental Monitoring Center, Shenyang City Environmental Monitoring Center and Jinzhou Environmental Monitoring Center. This standard was approved by the Ministry of Environmental Protection on September 20,.2010. This standard has been implemented since December 1,.2010. This standard is explained by the Ministry of Environmental Protection. Determination of free chlorine and total chlorine in water N,N-diethyl-1,4-phenylenediamine spectrophotometry Warning. Mercury salt is a highly toxic chemical. Wear protective equipment as required to avoid contact with skin and clothing. Waste after inspection The liquid should be properly and safely handled. 1 Scope of application This standard specifies the spectrophotometric method for the determination of free chlorine and total chlorine in water. This standard applies to free chlorine in landscape water reclaimed from surface water, industrial wastewater, medical wastewater, domestic sewage, intermediate water and sewage. Determination of total chlorine. This standard does not apply to the determination of turbid or high chroma water samples. For high concentration samples, using a 10 mm cuvette, the detection limit (in terms of Cl2) of this method is 0.03 mg/L, the measurement range (to The Cl2 count is 0.12 to 1.50 mg/L. For low concentration samples, using a 50 mm cuvette, the detection limit of this method (in terms of Cl2) is 0.004 mg/L, the measurement range (in terms of Cl2) is 0.016 to 0.20 mg/L. For samples with free chlorine or total chlorine concentration above the upper limit of the method, the sample can be measured after appropriate dilution. On-site determination of free chlorine and total chlorine in water was carried out in accordance with Appendix A. 2 Normative references The contents of this standard refer to the terms in the following documents. For undated references, the valid version applies to this standard. GB/T 5750.10 Standard Test Method for Drinking Water Standards for disinfection by-products GB/T 5750.11 Standard Test Method for Drinking Water Standards 3 Terms and definitions The following terms and definitions apply to this standard. 3.1 Free chlorine free chlorine Refers to chlorine in the form of hypochlorous acid, hypochlorite ions and dissolved elemental chlorine. 3.2 Chlorine combined chlorine Refers to chlorine in the form of chloramines and organic chloramines. 3.3 Total chlorine total chlorine Refers to chlorine in the form of "free chlorine" or "chlorinated chlorine", or both. 3.4 Chloramine chloramines A derivative in which one, two or three hydrogen atoms of ammonia are replaced by chlorine atoms as determined by the method (eg monochloramine, dichloramine, nitrogen trichloride) And chlorinated derivatives of organic nitrogen compounds. The composition of free chlorine and total chlorine is shown in Table 1. Table 1 Nouns and their composition Noun composition Free chlorine (free residual chlorine) Active free chlorine elemental chlorine, hypochlorous acid Potential free chlorine hypochlorite Total chlorine (total residual chlorine) elemental chlorine, hypochlorous acid, hypochlorite, chloramine 4 Principle of the method 4.1 Determination of free chlorine At pH 6.2-6.5, free chlorine reacts directly with N,N-diethyl-1,4-phenylenediamine (DPD) to form a red complex. The absorbance was measured at a wavelength of 515 nm. Since the free chlorine standard solution is unstable and difficult to obtain, this standard uses a iodine molecule or [I3]− instead of free chlorine as a calibration curve. Potassium iodate Benchmarking, under acidic conditions, reacts with potassium iodide as follows. IO3− 5I− 6H =3I2 3H2O, I2 I−=[I3]−, the resulting iodine molecule or [I3] − A color reaction with DPD, the ratio of the amount of iodine molecules to the amount of chlorine molecules is 1.1. 4.2 Determination of total chlorine At pH 6.2-6.5, elemental chlorine, hypochlorous acid, hypochlorite and chloramine react with DPD in the presence of excess potassium iodide. A red compound was formed and its absorbance was measured at a wavelength of 515 nm to determine total chlorine. 5 interference and elimination 5.1 Interference from other chlorine compounds Chlorine dioxide interferes with the determination of free chlorine and total chlorine, and chlorite interferes with the determination of total chlorine. Chlorine dioxide and chlorite ......


Similar standards: HJ 585-2010  HJ 587-2010  HJ 591-2010  
Similar PDFs (Auto-delivered in 9 seconds): GB 5085.1-2007  GB 5085.7-2019  HJ 609-2011