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GB/T 5750-2023 "Standard Test Methods for Drinking Water" series standards officially released


Time:

2023-03-29

GB/T 5750-2023《生活饮用水标准检验方法》系列标准,自2023年10月1日起实施。

New GB/T 5750 "Test Methods for Drinking Water"
- List of amendments, deletions, and modifications -

 

The progress in the revision of "Methods for the Testing of Drinking Water" (GB/T 5750-2006) has always attracted everyone's attention. On March 17, 2023, the State Administration of Market Supervision and Administration (the National Standardization Administration Committee) approved the issuance of GB/T 5750-2023 "Standard Test Methods for Drinking Water" series standards, which will be implemented as of October 1, 2023.

The standard text of the GB/T 5750-2023 "Standard Test Methods for Drinking Water" series has not yet been released. Let's first review the issues and shortcomings of the new standard GB/T 5750-2006 based on the previously released GB/T 5750 (draft for approval).

Drinking water safety is a basic guarantee of public health, related to the national economy and people's livelihood, and is one of the important public health issues that need attention.

GB/T 5750 "Standard Test Methods for Drinking Water" is a series of standards supporting the test methods of GB 5749 "Sanitary Standard for Drinking Water" in China, and is an important technical basis for carrying out the sanitary and safety assurance work of drinking water.

In addition to meeting the inspection requirements for water quality indicators in the "Sanitary Standard for Drinking Water" and improving the efficiency of drinking water quality inspection, this revision is mainly aimed at solving the problems and deficiencies in GB/T 5750-2006.

 

No.

Standard No

Standard Name

Substitution standard number

Implementation Date

1

GB/T 5750.1-2023

Standard test methods for drinking water Part 1: General

GB/T 5750.1-2006

2023/10/1

2

GB/T 5750.2-2023

Standard test methods for drinking water Part 2: Collection and preservation of water samples

GB/T 5750.2-2006

2023/10/1

3

GB/T 5750.3-2023

Standard test methods for drinking water Part 3: Water quality analysis Quality control

GB/T 5750.3-2006

2023/10/1

4

GB/T 5750.4-2023

Standard test methods for drinking water Part 4: Sensory properties and physical indicators

GB/T 5750.4-2006

2023/10/1

5

GBT 5750.5-2023

Standard test methods for drinking water Part 5: Inorganic non-metallic indicators

GB/T 5750.5-2006

2023/10/1

6

GB/T 5750.6-2023

Standard test methods for drinking water Part 6: Metals and metalloid indicators

GB/T 5750.6-2006

2023/10/1

7

GB/T 5750.7-2023

Standard test methods for drinking water Part 7: Comprehensive indicators of organic matter

GB/T 5750.7-2006

2023/10/1

8

GB/T 5750.8-2023

Standard test methods for drinking water Part 8: Organic index

GB/T 5750.8-2006

2023/10/1

9

GB/T 5750.9-2023

Standard test methods for drinking water Part 9: Pesticide indicators

GB/T 5750.9-2006

2023/10/1

10

GB/T 5750.10-2023

Standard test methods for drinking water Part 10: Indicators of disinfection by-products

GB/T 5750.10-2006

2023/10/1

11

GB/T 5750.11-2023

Standard test methods for drinking water Part 11: Indicators of disinfectants

GB/T 5750.11-2006

2023/10/1

12

GBT 5750.12-2023

Standard test methods for drinking water Part 12: Microbiological indicators

GB/T 5750.12-2006

2023/10/1

13

GB/T 5750.13-2023

Standard test methods for drinking water Part 13: Radioactive indicators

GB/T 5750.13-2006

2023/10/1

 

1、 Insufficient method sensitivity

For some indicators such as volatile phenols and pesticides, testing methods lag behind the development status of testing technology, do not match testing instruments, or do not fully utilize the efficiency of modern testing instruments, resulting in increased testing workload and testing costs.

For individual indicators such as epichlorohydrin, the detection limit of the recommended test method is higher than the limit value of this water quality indicator in GB5749.

 

2、 Lack of inspection methods for some indicators

Lack of inspection methods for most water quality indicators in Appendix A

 

3、 Inadequate method convenience

Derivatization treatment single substance analysis

Residual chlorine, total chlorine

 

4、 Inadequate method automation (volatile phenols, cyanide)

 

5、 Inadequate application of mass spectrometry technology

In response to the above issues, the new version of the Standard Test Method for Drinking Water has completed targeted revisions. Overall
Sensory properties and physical indicators: 1 indicator, 2 methods
Inorganic non-metallic indicators: 2 indicators, 3 methods
Organic matter indicators: 55 indicators, 7 methods
Pesticide indicators: 30 indicators, 9 methods
Disinfection by-product indicators: 14 indicators, 1 method
Disinfectant indicators: 2 indicators, 2 methods
Involving 24 methods and 104 indicators

 

 

The specific revisions are as follows:

 

01. Compared to GB/T 5750.4, the revised content of the new version

Added
Two inspection methods for odor and odor
Olfactory threshold method
Analytic Hierarchy Process for Olfactory Sense
Two test methods for volatile phenols and anionic synthetic detergents
Flow injection method
Continuous flow analysis

 

02. Compared to GB/T 5750.5, the revised content of the new version
Deleted
Zirconium fluoride alizarin colorimetry, nitrate (calculated as N) cadmium column reduction method, iodide gas chromatography
Added
Two methods for cyanide and ammonia (calculated by N)
Determination of Volatile Phenolic Compounds by Flow Injection Method
Determination of Volatile Phenolic Compounds by Continuous Flow Analysis
Iodide inductively coupled plasma mass spectrometry
Three methods of perchlorate
Ion chromatography - hydroxide system eluent
Ion chromatography - carbonate system eluent
Ultra high performance liquid chromatography tandem mass spectrometry

 

03. Compared to GB/T 5750.6, the revised content of the new version
Deleted
Determination of iron, manganese, and copper by flame atomic absorption spectrophotometry extraction method, flame atomic absorption spectrophotometry coprecipitation method, flame atomic absorption spectrophotometry mercaptocotton enrichment method
Zinc reagent cyclohexanone spectrophotometry, catalytic oscillopolarography, flame atomic absorption spectrophotometry extraction method, flame atomic absorption spectrophotometry coprecipitation method, flame atomic absorption spectrophotometry mercaptocotton enrichment method
Arsenic spot method for arsenic
Catalytic Oscillopolarography and Diaminobenzidine Spectrophotometry of Selenium
Determination of cadmium and lead by dithizone spectrophotometry, catalytic oscillopolarography, flame atomic absorption spectrophotometry extraction method, flame atomic absorption spectrophotometry coprecipitation method, flame atomic absorption spectrophotometry mercaptocotton enrichment method

Catalytic oscillopolarography of titanium

Added

Two Methods of Arsenic

Liquid chromatography-inductively coupled plasma mass spectrometry
Liquid chromatography atomic fluorescence spectrometry
Selenium liquid chromatography-inductively coupled plasma mass spectrometry

 

Three methods of ethyl mercury chloride

Liquid chromatography atomic fluorescence spectrometry
Liquid chromatography-inductively coupled plasma mass spectrometry
Purge trap gas chromatography mass spectrometry cold atomic fluorescence spectrometry

 

Two methods for asbestos

Scanning electron microscopy energy dispersive spectroscopy
Phase contrast microscope infrared spectroscopy

 

 

04. Compared to GB/T 5750.7, the revised content of the new version
Added
Permanganate index 2 methods 2
Spectrophotometry
Potentiometric titration
Determination of total organic carbon film conductivity

 

05. Compared to GB/T 5750.8, the revised content of the new version
Revised the original 28 indicators
Revised indicators: carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, vinyl chloride, 1,1-dichloroethylene, 1,2-dichloroethylene (cis, trans), trichloroethylene, tetrachloroethylene, acrylamide, di (2-ethylhexyl) phthalate, microcystin, epichlorohydrin, benzene, toluene, xylene (o, m, p), ethylbenzene, cumene, chlorobenzene, 1,2-dichlorobenzene, 1,4-dichlorobenzene, trichlorobenzene, tetrachlorobenzene, styrene Hexachlorobutadiene

Include 27 new indicators
Newly added indicators: 1,1-dichloroethane, 1,2-dichloropropane, 1,3-dichloropropane, 2,2-dichloropropane, 1,1,2-trichloroethane, 1,2,3-trichloropropane, 1,1,1,2-tetrachloroethane, 1,1,2,2-tetrachloroethane, 1,2-dibromo-3-chloropropane, 1,1-dichloropropene, 1,2-dioxypropylene (cis, trans), 1,2-dibromoethylene, 1,2-dibromoethane, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, propylbenzene, 4-methylisopropyl benzene, butylene, pentachlorobenzene, 2-chlorotoluene 4-chlorotoluene, 1,3-dichlorobenzene, bromobenzene, isobutylbenzene, naphthalene, tert-butylbenzene, diphenylamine

Add a total of 7 inspection methods
Test method for epichlorohydrin in drinking water - Gas chromatography mass spectrometry
Test method for 55 volatile organic compounds (VOCs) in drinking water - Purge trap/gas chromatography mass spectrometry
Determination of five microcystins in drinking water by liquid chromatography tandem mass spectrometry
Determination of acrylamide in drinking water - Liquid chromatography tandem mass spectrometry
Test method for 11 volatile organic compounds in drinking water - Headspace gas chromatography
Test Method for 27 Halogenated Hydrocarbons in Drinking Water - Headspace Gas Chromatography
Test method for diphenylamine in drinking water - High performance liquid chromatography

 

06. Compared to GB/T 5750.9, the revised content of the new version
Revised the original 18 indicators
Revised indicators: DDT, lindane, parathion, methyl parathion, malathion, dimethoate, chlorothalonil, deltamethrin, mirazone, 2,4 drops, dichlorvos, furan, chlorpyrifos, atrazine, glyphosate, heptachlor, hexachlorobenzene, pentachlorophenol
 

Include 12 new indicators
New indicators added: flubenclamide, flufluflufenuron, diflubenzuron, fluridinyl urea, fluflufenuron, chlorfenuron, dipyruron, chlorfenamide, liguron, methoxuron, and niclosamide

A total of 9 test methods have been added
Standard test method for 15 semi volatile organic compounds in drinking water - solid phase extraction/gas chromatography mass spectrometry
Standard test method for furan, glyphosate, methamphetamine, and 2,4 drops of drinking water - Liquid chromatography mass spectrometry
Standard test method for methasone, carbofuran, glyphosate, 2,4 - drops, atrazine, pentachlorophenol, and methyl parathion in drinking water - liquid chromatography tandem mass spectrometry
Standard test method for 11 phenyl urea insecticides in drinking water - liquid chromatography tandem mass spectrometry
Standard test method for five pyrethroids in drinking water - High performance liquid chromatography
Standard test method for chlorothalonil in drinking water - capillary column gas chromatography
Standard test method for glyphosate in drinking water - ion chromatography
Standard test method for niclosamide in drinking water - extraction - reverse extraction spectrophotometric method
Standard test method for niclosamide in drinking water - high performance liquid chromatography

 

07. Compared to GB/T 5750.10, the revised content of the new version
Revise 8 indicators, add 5 indicators, and add a total of 1 inspection method
Revised indicators include trichloromethane, tribromomethane, dichloromethane, dichlorodibromomethane, dichloromethane, dichloroacetic acid, trichloroacetic acid, 2,4,6-trichlorophenol
New indicators include monochloroacetic acid, monochloroacetic acid, dibromoacetic acid, chlorobromomethane, and dibromomethane
Three new methods including solid phase extraction gas chromatography mass spectrometry, liquid liquid extraction gas chromatography mass spectrometry, and solid phase extraction gas chromatography tandem mass spectrometry have been added
Method for the determination of five haloacetic acids in drinking water by ion chromatography: monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, and dibromoacetic acid

 

08. Compared to GB/T 5750.11, the revised content of the new version
The original indicators of free residual chlorine and total chlorine have been revised and two test methods have been added
In situ N, N-diethyl-phenylenediamine (DPD) determination of free chlorine in drinking water
In situ N, N-diethyl-phenylenediamine (DPD) of total chlorine in domestic drinking water

 

09. Compared to GB/T 5750.12, the revised content of the new version
Added
Total bacterial count enzyme substrate method
Fluorescent antibody separation by filtration membrane concentration/density gradient method for Giardia and Cryptosporidium
Enterococcal membrane method
Clostridium perfringens membrane filtration method
The new standard introduces a filter membrane concentration/density gradient separation fluorescent antibody method during the detection of Giardia and Cryptosporidium. This method reduces equipment investment by 75%, reduces consumables cost by 85%, and reduces the detection cost of Cryptosporidium from 3000 yuan/sample to 300 yuan/sample, while ensuring the recovery rate of the GB/T 5750-2006 method.

 

 10. Compared to GB/T 5750.13, the revised content of the new version
Added
Determination of uranium in drinking water by ultraviolet fluorescence spectrometry
Radium 226 emission method and liquid scintillation counting method in drinking water

 

 
 
 
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