GB/T 31197-2026 Inorganic chemicals for industrial use—Determination of impurity ions—Ion chromatography method English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 31197-2026
Replaces GB/T 31197-2010
Inorganic chemicals for industrial use - Determination of impurity ions - Ion chromatography method
无机化工产品 杂质离子的测定 离子色谱法
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Reagents or Materials
6 Apparatus
7 Test Procedure
8 Qualitative Analysis
9 Quantitative Analysis
10 Expression of Results
11 Evaluation of Results
12 Apparatus Installation and Safety Precautions
13 Items to be Specified in Product Standards or Method Standards
Determination of impurity ions in inorganic chemical products — Ion chromatography method
1 Scope
This document specifies the principle, reagents or materials, apparatus, test procedure, qualitative analysis, quantitative analysis, expression of results, and evaluation of results for the determination of impurity ions in inorganic chemical products by ion chromatography.
This document applies to the quantitative determination of impurity anions and cations in inorganic chemical products by ion chromatography.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 601 Chemical reagents — Preparation of standard volumetric solutions
GB/T 603 Chemical reagents — Preparations of reagent solutions for use in test methods
GB/T 5750.5-2023 Standard examination methods for drinking water — Part 5: Inorganic non metallic indicators
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 ion chromatography method
A chromatographic method for the separation and analysis of ionic compounds based on the charge interaction between the ionic compounds and the ionic functional groups on the stationary phase surface.
[Source: GB/T 14666-2025, 8.2.4.8]
4 Principle
The sample is prepared into a test solution and introduced into the chromatographic column. The components are eluted by the eluent. The analyte ions are separated according to their different retention characteristics on the chromatographic column, and are finally carried by the eluent to the detector, forming Gaussian shaped chromatographic peaks. The retention time is used for qualitative analysis, and the peak area (or peak height, etc.) is used for quantitative analysis.
5 Reagents or Materials
5.1 General provisions
5.1.1 Unless otherwise specified, the standard volumetric solutions, preparations and products used in the tests shall be prepared in accordance with GB/T 601 and GB/T 603.
5.1.2 Unless otherwise stated, all solutions in this document refer to aqueous solutions.
5.1.3 The impurity standard solutions, eluents, suppressor regenerants and derivatisation reagents used in this document shall be prepared using reagents of analytical grade or higher. The reagents used for sample processing shall be of analytical grade or higher.
5.1.4 Impurity standard solutions should be stored in a cool, dry place. The general storage period for sealed containers is 6 months. If turbidity, precipitation or colour change occurs, the solution shall be freshly prepared.
5.1.5 Cyanide standard solutions, nitrite standard solutions, carbonate standard solutions, chlorate standard solutions and chlorite standard stock solutions shall be freshly prepared and used immediately.
5.1.6 Diluted impurity standard solutions and mixed diluted standard solutions shall be freshly prepared and used immediately. When preparing mixed diluted standard solutions, solutions that form precipitates or turbidity upon mixing shall not be mixed together.
5.2 Water
Deionised water with an electrical conductivity (at 25 °C) not greater than 0.0055 mS/m (equivalent to a resistivity of not less than 18.2 MΩ·cm).
5.3 Impurity standard solutions
Impurity ion standard solutions shall be prepared according to Annex A, or certified reference materials may be used.
5.4 Eluent
5.4.1 Basic requirements for the eluent
The eluent shall be selected according to the following requirements:
a)It shall not damage the stationary phase of the separation column;
b) It shall be suitable for the separation of the target analyte ions;
c) It shall be suitable for detection;
d) It shall meet the performance requirements of the suppressor and derivatisation device, where used;
e) It shall remain chemically stable over a long period.
5.4.2 Preparation of the eluent
The eluent shall be degassed after preparation, or shall be prepared using pre degassed water. The eluent shall be stored in a cool place to prevent the growth of bacteria or algae. Common eluents are given in Annex B.
5.5 Suppressor regenerant
After continuous use of a suppression device, it shall be regenerated using a suppressor regenerant. Common suppressor regenerants include sulfuric acid, potassium hydroxide or sodium hydroxide, tetrabutylammonium hydroxide and lithium chloride. Based on the properties of the sample to be analysed, the type of eluent used, the type of suppressor and the method of suppressor use, select either the self regenerating recycling mode, external water addition mode or regenerant mode for regeneration treatment.
5.6 Post column derivatisation reagents
Common post column derivatisation reagents include metal derivatisation reagents, chromate derivatisation reagents and bromate derivatisation reagents. According to the nature of the analyte ions, appropriate reagents shall be selected for post column derivatisation.
5.7 Microporous membrane filter
0.22 μm or 0.45 μm microporous membrane filter.
6 Apparatus
6.1 Composition of the ion chromatograph
An ion chromatograph typically consists of a solvent delivery system, an injection system, a separation system, a suppression or derivatisation system, a detection system, a data processing and control system, and a waste collection tank. It may also include auxiliary devices such as a gradient eluent generation device and a bubble eliminator (e.g., a vacuum degassing device). A schematic diagram of a typical ion chromatograph is shown in Figure 1.
6.2 Components of the apparatus
Standard
GB/T 31197-2026 Inorganic chemicals for industrial use—Determination of impurity ions—Ion chromatography method (English Version)
Standard No.
GB/T 31197-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
19000 words
Price(USD)
570.0
Implemented on
2026-10-1
Delivery
via email in 1~5 business day
Detail of GB/T 31197-2026
Standard No.
GB/T 31197-2026
English Name
Inorganic chemicals for industrial use—Determination of impurity ions—Ion chromatography method
GB/T 31197-2026 Inorganic chemicals for industrial use—Determination of impurity ions—Ion chromatography method English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 31197-2026
Replaces GB/T 31197-2010
Inorganic chemicals for industrial use - Determination of impurity ions - Ion chromatography method
无机化工产品 杂质离子的测定 离子色谱法
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Reagents or Materials
6 Apparatus
7 Test Procedure
8 Qualitative Analysis
9 Quantitative Analysis
10 Expression of Results
11 Evaluation of Results
12 Apparatus Installation and Safety Precautions
13 Items to be Specified in Product Standards or Method Standards
Determination of impurity ions in inorganic chemical products — Ion chromatography method
1 Scope
This document specifies the principle, reagents or materials, apparatus, test procedure, qualitative analysis, quantitative analysis, expression of results, and evaluation of results for the determination of impurity ions in inorganic chemical products by ion chromatography.
This document applies to the quantitative determination of impurity anions and cations in inorganic chemical products by ion chromatography.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 601 Chemical reagents — Preparation of standard volumetric solutions
GB/T 603 Chemical reagents — Preparations of reagent solutions for use in test methods
GB/T 5750.5-2023 Standard examination methods for drinking water — Part 5: Inorganic non metallic indicators
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 ion chromatography method
A chromatographic method for the separation and analysis of ionic compounds based on the charge interaction between the ionic compounds and the ionic functional groups on the stationary phase surface.
[Source: GB/T 14666-2025, 8.2.4.8]
4 Principle
The sample is prepared into a test solution and introduced into the chromatographic column. The components are eluted by the eluent. The analyte ions are separated according to their different retention characteristics on the chromatographic column, and are finally carried by the eluent to the detector, forming Gaussian shaped chromatographic peaks. The retention time is used for qualitative analysis, and the peak area (or peak height, etc.) is used for quantitative analysis.
5 Reagents or Materials
5.1 General provisions
5.1.1 Unless otherwise specified, the standard volumetric solutions, preparations and products used in the tests shall be prepared in accordance with GB/T 601 and GB/T 603.
5.1.2 Unless otherwise stated, all solutions in this document refer to aqueous solutions.
5.1.3 The impurity standard solutions, eluents, suppressor regenerants and derivatisation reagents used in this document shall be prepared using reagents of analytical grade or higher. The reagents used for sample processing shall be of analytical grade or higher.
5.1.4 Impurity standard solutions should be stored in a cool, dry place. The general storage period for sealed containers is 6 months. If turbidity, precipitation or colour change occurs, the solution shall be freshly prepared.
5.1.5 Cyanide standard solutions, nitrite standard solutions, carbonate standard solutions, chlorate standard solutions and chlorite standard stock solutions shall be freshly prepared and used immediately.
5.1.6 Diluted impurity standard solutions and mixed diluted standard solutions shall be freshly prepared and used immediately. When preparing mixed diluted standard solutions, solutions that form precipitates or turbidity upon mixing shall not be mixed together.
5.2 Water
Deionised water with an electrical conductivity (at 25 °C) not greater than 0.0055 mS/m (equivalent to a resistivity of not less than 18.2 MΩ·cm).
5.3 Impurity standard solutions
Impurity ion standard solutions shall be prepared according to Annex A, or certified reference materials may be used.
5.4 Eluent
5.4.1 Basic requirements for the eluent
The eluent shall be selected according to the following requirements:
a)It shall not damage the stationary phase of the separation column;
b) It shall be suitable for the separation of the target analyte ions;
c) It shall be suitable for detection;
d) It shall meet the performance requirements of the suppressor and derivatisation device, where used;
e) It shall remain chemically stable over a long period.
5.4.2 Preparation of the eluent
The eluent shall be degassed after preparation, or shall be prepared using pre degassed water. The eluent shall be stored in a cool place to prevent the growth of bacteria or algae. Common eluents are given in Annex B.
5.5 Suppressor regenerant
After continuous use of a suppression device, it shall be regenerated using a suppressor regenerant. Common suppressor regenerants include sulfuric acid, potassium hydroxide or sodium hydroxide, tetrabutylammonium hydroxide and lithium chloride. Based on the properties of the sample to be analysed, the type of eluent used, the type of suppressor and the method of suppressor use, select either the self regenerating recycling mode, external water addition mode or regenerant mode for regeneration treatment.
5.6 Post column derivatisation reagents
Common post column derivatisation reagents include metal derivatisation reagents, chromate derivatisation reagents and bromate derivatisation reagents. According to the nature of the analyte ions, appropriate reagents shall be selected for post column derivatisation.
5.7 Microporous membrane filter
0.22 μm or 0.45 μm microporous membrane filter.
6 Apparatus
6.1 Composition of the ion chromatograph
An ion chromatograph typically consists of a solvent delivery system, an injection system, a separation system, a suppression or derivatisation system, a detection system, a data processing and control system, and a waste collection tank. It may also include auxiliary devices such as a gradient eluent generation device and a bubble eliminator (e.g., a vacuum degassing device). A schematic diagram of a typical ion chromatograph is shown in Figure 1.
6.2 Components of the apparatus
