GB/T 6324.8-2014Test methods of organic chemical products - Part 8: Determination of water of liquid products - Carl.fischer coulometric method (English PDF)
有机化工产品试验方法 第8部分：液体产品水分测定 卡尔.费休库仑电量法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2014
Implementation date
July 1, 2015
Scope
GB/T 6324.8-2014 is the English-translated version of 有机化工产品试验方法 第8部分：液体产品水分测定 卡尔.费休库仑电量法.
GB/T 6324.8-2014 is the Chinese standard "Test methods of organic chemical products - Part 8: Determination of water of liquid products - Carl.fischer coulometric method".
Its scope clause reads: GB/T 6324 This section specifies the determination of the majority of liquid organic chemicals in an experimental method for water --- Karl Fisher Hugh coulomb law.
This section applies to the determination of the mass fraction of water in the product at 0 to 2.0%. This section does not apply to the main component capable of reacting with the Karl Fischer reagent and sample the water to generate energy and reducing oxidation of iodine or iodide Determination of sample water.
In some cases, the sample pretreatment required measures, they have done a specified in the relevant product standard. Its clauses include general provisions; principle of the method.
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Document preview — GB/T 6324.8-2014
National Standard of the People's Republic of China
- ICS
- 71.080.01
- Classification
- G 15
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 General Provisions
- 4 principle of the method
1 Scope
GB/T 6324 This section specifies the determination of the majority of liquid organic chemicals in an experimental method for water --- Karl Fisher
Hugh coulomb law.
This section applies to the determination of the mass fraction of water in the product at 0 to 2.0%.
This section does not apply to the main component capable of reacting with the Karl Fischer reagent and sample the water to generate energy and reducing oxidation of iodine or iodide
Determination of sample water.
In some cases, the sample pretreatment required measures, they have done a specified in the relevant product standard.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6283-2008 Determination of moisture content of chemical products Karl Fischer method (General method)
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 26793 coulometry trace moisture analyzer
3 General Provisions
3.1
Unless otherwise stated in the analysis using only recognized as analytical reagents and GB/T 6682 stipulated three water.
3.2
Karl Fischer reagent contains iodine, an organic base such as pyridine, sulfur dioxide, methanol or other alcohols. Wear chemical protective gloves when operating
And other protective equipment, avoid inhalation or direct contact with the reagent vapor skin.
3.3
Sampling and sample pre-treatment in accordance with the appropriate product standard provisions should be avoided external ambient moisture contamination or sample sampling equipment.
4 principle of the method
Present in the sample of any water and Karl Fischer reagent for quantitative reaction, the chemical reaction equation is.
H2O I2 SO2 3C5H5N
-> 2C5H5N · HI SO3 C5H5N · SO3
C5H5N · SO3 CH3OH
-> C5H5N · HSO4CH3
Karl Fischer coulometric moisture analyzer in a measuring electrode and a pair of electrodes for electrolysis reaction system changes for iodine measurement
An anode electrode compartment electromotive force detected drive changes electrolytic electrolysis electrodes, an electrolytic oxidation, respectively, on an anode electrode, a cathode, also […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 6324.1-2004 — Test method of organic chemical products -- Part 1: Water miscibility test of liquid organic chemical products
GB/T 6324.10-2020 — Test method of organic chemical products - Part 10: Determination of trace sulfur in organic liquid products - Ultraviolet fluorescence method
GB/T 6324.11-2021 — Test method of organic chemical products—Part 11: Determination of trace arsenic in liquid products—Atomic fluorescence spectrometric method
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