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
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.