Standard No.:	GB/T 5750.10-2023
English Name:	Standard examination methods for drinking water—Part 10: Disinfection by-products indices
Chinese Name:	生活饮用水标准检验方法 第10部分：消毒副产物指标
Chinese Classification:	C51    Environmental sanitation
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2023-03-17
Implemented on:	2023-10-1
Status:	valid
Superseding:	GB/T 5750.10-2006 Standard examination methods for drinking Water - Disinfection by-products parameters
Target Language:	English
File Format:	PDF
Word Count:	27500 words
Translation Price(USD):	1050.0
Delivery:	via email in 1~5 business day

Foreword This document is drafted in accordance with the provisions of GB/T1.1-202 "Standardization Work Guidelines Part 1 Structure and Drafting Rules for Standardization Documents". This document is part 10 of GB/T 5750 "Standard Test Methods for Drinking Water". GB/T 5750 has been published in the following parts. Part 1:General Provisions. Part 2: the collection and preservation of water samples. Part 3: Quality control of water quality analysis. Part 4: sensory properties and physical indicators. Part 5: inorganic non-metallic indicators. Part 6: metal and metal-like indicators. Part 7: organic composite indicators. Part 8 organic indicators. Part 9: pesticide indicators. Part 10: Disinfection by-product indicators. Part 11: Disinfectant indicators. Part 12: Microbial indicators. Part 13: Radioactive indicators. This document replaces GB/T 5750.10-2006 "Standard Test Methods for Drinking Water Disinfection Byproduct Indicators" and GB/T 5750.10-2006, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Increased the "terms and definitions" (see Chapter 3). b) The addition of six test methods (see 13,2, 14.2, 15.3, 23.1, 23.2, 23.3). c) deleted methylene chloride and test methods (see 5.1 of the 2006 version. Please note that some of the contents of this document may relate to patents. The issuing authority of this document does not assume responsibility for identifying patents This document is proposed and attributed by the National Health and Wellness Commission of the People's Republic of China. Introduction GB/T 5750 "Standard Test Methods for Drinking Water" as the recommended national standard for drinking water testing technology and GB 5749 "Drinking Water Sanitation Standards" supporting the important technical support of GB 5749, for the implementation of GB 5749, to carry out health and safety assessment of drinking water to provide test methods. GB / T 5750 consists of 13 parts. Part 1: General Provisions. The purpose is to provide the basic principles and requirements of water quality testing. Part 2: the collection and preservation of water samples. The purpose is to provide water samples collected, preservation, management, transport and sampling quality control of the basic principles, measures and requirements. Part 3: quality control of water quality analysis. The purpose is to provide water quality inspection and testing laboratory quality control requirements and methods Part 4: Sensory traits and physical indicators. The purpose is to provide sensory traits and physical indicators of the corresponding test methods Part 5: inorganic non-metallic indicators. The purpose is to provide inorganic non-metallic indicators of the corresponding test methods Part 6: Metals and metal-like indicators. The purpose is to provide metal and metal-like indicators of the corresponding test methods Part 7: Organic composite indicators. The purpose is to provide a comprehensive index of organic substances corresponding test methods Part 8: organic indicators. The purpose is to provide the corresponding test methods for organic indicators. Part 9: Pesticide indicators. The purpose is to provide the corresponding test methods for pesticide indicators. Part 10: Disinfection by-products indicators. The purpose is to provide the corresponding test methods for disinfection by-product indicators Part 11: Disinfectant indicators. The purpose is to provide the corresponding test methods for disinfectant indicators Part 12: Microbiological indicators. The purpose is to provide the corresponding test methods for microbial indicators Part 13: radioactive indicators. The purpose is to provide the corresponding test methods for radioactive indicators 1 Scope This document describes the domestic drinking water trichloromethane, trimethane, dichloromethane, monochlorodiammomethane, diammomethane, chloromethane, cyanogen chloride, formaldehyde, acetaldehyde, trichloroacetaldehyde, monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monoacetic acid, diacetic acid, 2,4,6-trichlorophenol. Chlorite, chlorate, oxalate, nitrosodimethylamine and trichloromethane in water (capillary column gas chromatography), formaldehyde, acetaldehyde, trichloroacetaldehyde (headspace gas chromatography), monochloroacetic acid (liquid-liquid extraction derivatization gas chromatography), dichloroacetic acid (liquid-liquid extraction derivatization gas chromatography), trichloroacetic acid (liquid-liquid extraction derivatization gas chromatography), 2,4,6-trichlorophenol (derivatization gas chromatography) ) chlorite (ion chromatography), chlorate (ion chromatography), oxalate (ion chromatography a hydroxide system eluate, ion chromatography a carbonate system eluate), nitrosodimethylamine (solid phase extraction gas chromatography mass spectrometry) determination method. This document applies to the determination of indicators of disinfection by-products in drinking water and (or) water sources 2 normative reference documents The following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the reference document, only the date of the corresponding version applies to this document; do not note the date of the reference document, its latest version (including all the revision of the list) applies to this document. GB/T 5750.1 standard test methods for drinking water Part 1: General Provisions GB/T 5750.3 standard test methods for drinking water Part 3: Quality control of water quality analysis GB/T 5750.4-2023 standard test methods for drinking water Part 4: Sensory properties and physical indicators GB/T 5750.5-2023 standard test methods for drinking water Part 5: inorganic non-metallic indicators Part 8: organic indicators GB/T 5750.8-2023 standard test methods for drinking water GB / T 6682 analytical laboratory water specifications and test methods 3 Terms and definitions GB / T 5750.1 and GB / T 5750.3 defined terms and definitions apply to this document 4 Trichloromethane 4.1 Capillary column gas chromatography 5 Trimethoprim 5.1 Purge-trap gas chromatography-mass spectrometry By GB/T 5750.8-2023 in 4.2 described in the method of headspace capillary column gas chromatography 5.2 Determination by GB/T 5750.8-2023 in the method described in 4.3 6 Dichloromethane 6.1 purge trap gas chromatography mass spectrometry Determination by GB/T 5750.8-2023 in the method described in 4.2 6.2 Headspace capillary column gas chromatography According to GB/T 5750.8 a 2023 in the 4.3 description of the method of determination 7 Monochlorodioxin 7.1 Purge-trap gas chromatography-mass spectrometry According to GB/T 5750.8-2023 in the 4.2 description of the method of determination 7.2 Headspace capillary column gas chromatography According to GB/T 5750.8-2023 in the 4.3 described method to determine 8 Di-O-methane Blow-by-trap gas chromatography-mass spectrometry: determined by the method described in GB/T 5750.8-2023 4.2 9Chloromethane Blow-by-trap gas chromatography-mass spectrometry: determined by the method described in 4.2 of GB/T 5750.8-2023 10 Cyanuric chloride 10.1 Isonicotinic acid barbiturate spectrophotometric method 10.1.1 Minimum detectable mass concentration The minimum detectable mass of this method is 0.0 g. If a 10.0 mL water sample is taken, the minimum detectable mass concentration is 001 mg/L. This method is only used for the determination of cyanogen chloride in drinking water (disinfected with chlorinated disinfectants). 10.1.2 Principle Cyanuric chloride in water reacts with isonicotinic acid-barbituric acid reagent to produce a blue-purple compound, which is quantified colorimetrically at 600 nm. 11 Formaldehyde 11.14-amino-3-hydrazin-5-thio-1,24-trichloromethane (AHMT) spectrophotometric method 11.1.1 The minimum detection mass concentration of this method is 0.25g, if 5.0m water sample is taken for determination, the minimum detection mass concentration is 0.05mg/L. AHMT spectrophotometric method is highly selective, other aldehydes, such as acetaldehyde, propionaldehyde, n-butyl aldehyde, acrolein and benzaldehyde, etc. do not interfere with this method. 11.1.2 Principle Formaldehyde in water and AHMT (CHNS) condensation under alkaline conditions, after the oxidation of potassium periodate into 6-yl-S-triazabromo [4.3-b]-S-tetraazabenzene purple-red compound, its color shade is proportional to the formaldehyde content. 12 Acetaldehyde 12.1 Gas chromatographic method 12.1.1 Minimum detectable mass concentration The minimum detection mass of this method is acetaldehyde 12ng and propylene 0.95ng. If 50L water samples are taken directly into the sample, the minimum detection mass concentration is: acetaldehyde 0.3mg/L and acrolein 0.02mg / L. Under the selected chromatographic conditions, formaldehyde, propionaldehyde, acetone and butyraldehyde do not interfere with the determination 12.1.2 Principle Acetaldehyde and acrolein in water can be directly separated and determined by gas chromatography with hydrogen flame ionization detector, the peak order of acrolein awake and acetaldehyde 13 Trichloroacetaldehyde 13.1 headspace gas chromatography 13.1.1 Minimum detectable mass concentration The minimum detectable mass concentration of this method is 1pg/L. 14 Monochloroacetic acid 14.1 Liquid-liquid extraction derivatization gas chromatography 14.1.1 Minimum detectable mass concentration The minimum detectable mass of this method: monochloroacetic acid (MCAA), dichloroacetic acid (DCAA) trichloroacetic acid (TCAA) are 0.062ng, 0.025ng, 0.012ng. If 25mL of water samples are taken for determination, the minimum detectable mass concentrations are: 5.0g/L, 2.0g/L.1.0pg/L. 15 Dichloroacetic acid 15.1 Liquid-liquid extraction derivative gas chromatography Determination by the method described in 14.1 15.2 Ion chromatography - conductivity detection method Determination by the method described in 14.2 15.3 High performance liquid chromatography-tandem mass spectrometry 15.3.1 Minimum detection mass concentration The minimum detectable mass concentrations of dichloroacetic acid, trichloroacetic acid, orotate, chlorate and chlorite are 8.1pg/L, 10.0ug/L, 2.5ug/L, 20.0ug/L and 19.0g/L. This method is only used for the determination of dichloroacetic acid, trichloroacetic acid, orotate, chlorate and chlorite in domestic drinking water.

Foreword Introduction 1 Scope 2 normative reference documents 3 Terms and definitions 4 Trichloromethane 5 Trimethoprim 6 Dichloromethane 7 Monochlorodioxin 8 Di-O-methane 9Chloromethane 10 Cyanuric chloride 11 Formaldehyde 12 Acetaldehyde 13 Trichloroacetaldehyde 14 Monochloroacetic acid 15 Dichloroacetic acid