GB/T 6023-2008Butadiene for industrial use - Determination of trace water - Coulometric Karl Fischer method (English PDF)
工业用丁二烯中微量水的测定 卡尔.费休库仑法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 19, 2008
Implementation date
February 1, 2009
Scope
GB/T 6023-2008 is the English-translated version of 工业用丁二烯中微量水的测定 卡尔.费休库仑法.
GB/T 6023-2008 is the Chinese standard "Butadiene for industrial use - Determination of trace water - Coulometric Karl Fischer method". Its scope clause reads: standard specifies the Karl Fischer coulometry industrial butadiene content of trace water.
This standard applies to the determination of water by industry and other carbon-butadiene Olefins trace measurement range (5 ~ 500) mg/kg. This standard is not intended to illustrate its use of all safety-related issues.
Thus, the user of this standard should be responsible for the prior establishment Appropriate safety and health practices and determine the appropriate rules and regulations. Its clauses include method summary; reagents and materials.
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Document preview — GB/T 6023-2008
National Standard of the People's Republic of China
- ICS
- 71.080.10
- Classification
- G 15
- Replacing
- GB/T 6023-1999
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Method summary
- 4 Reagents and materials
1 Scope
1.1
standard specifies the Karl Fischer coulometry industrial butadiene content of trace water.
This standard applies to the determination of water by industry and other carbon-butadiene Olefins trace measurement range (5 ~ 500) mg/kg.
1.2
This standard is not intended to illustrate its use of all safety-related issues. Thus, the user of this standard should be responsible for the prior establishment
Appropriate safety and health practices and determine the appropriate rules and regulations.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 2366-1986 chemical products Determination of moisture content by gas chromatography
GB/T 8170 numerical rounding rules
GB/T 13290 Industrial liquid propylene and butadiene sampling method
3 Method summary
The test sample flows through the gasification unit dedicated entirely vaporized in the cell through the Karl Fischer coulometric analyzer vaporized water in the sample
And Karl Fischer reagent iodine, sulfur dioxide, an organic base (such as pyridine) and the presence of methanol, the following reaction occurs.
H2O + I2 + SO2 + CH3 -> OH + 3RN (RNH) SO4CH3 + 2 (RNH) I
Iodine consumed by the electrolysis of the anolyte containing iodine ions added.
2I -> - I2 + 2e
And the amount of iodine required for the reaction by the cell is proportional to power, therefore, record the amount of electricity electrolysis, according to Faraday's law of electrolysis,
You can find a sample of the water content.
4 Reagents and materials
4.1 fused silica capillary
diameter (0.20 ± 0.01) mm, length (1.5 ± 0.1) m;
4.2 micro syringe
100µL;
4.3 Medical needle
9;
4.4
compression nut;
4.5 stainless steel ferrule
middle hole, aperture 1.5mm;
4.6 Gasket
silicone rubber;
4.7 plastic spacer
PTFE, the middle hole, aperture 1.5mm;
4.8 benzene - water balance solution
according to GB/T 2366-1986 5.2.1 formulated;
4.9
Karl Fischer coulometry electrolyte (catholyte, anolyte);
4.10 Ethylene glycol
water content not more than 0.05%;
4.11 Nitrogen
purity (volume fraction) of not less than 99.995%.
......
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
Similar standards
Editions of GB/T 6023
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 6023-2008 | Butadiene for industrial use - Determination of trace water - Coulometric Karl Fischer method | current edition | Current |
| GB/T 6023-1999 | Butadiene for industrial use - Determination of trace water - Coulometric Karl Fischer method | previous edition | Superseded |
This page sells the current edition, GB/T 6023-2008. Earlier editions are listed for reference only.
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