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GB/T 6023-2008: Butadiene for industrial use -- Determination of trace water -- Coulometric Karl Fischer method
Status: Valid GB/T 6023: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 6023-2008 | English | 189 |
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Butadiene for industrial use -- Determination of trace water -- Coulometric Karl Fischer method
| Valid |
GB/T 6023-2008
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| GB/T 6023-1999 | English | 279 |
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Butadiene for industrial use-Determination of trace water-Coulometric Karl Fischer method
| Obsolete |
GB/T 6023-1999
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| GB/T 6023-1985 | English | RFQ |
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Butadiene for industrial use--Determination of trace water--Kaxl Fischer method
| Obsolete |
GB/T 6023-1985
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PDF similar to GB/T 6023-2008
Basic data | Standard ID | GB/T 6023-2008 (GB/T6023-2008) | | Description (Translated English) | Butadiene for industrial use -- Determination of trace water -- Coulometric Karl Fischer method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G15 | | Classification of International Standard | 71.080.10 | | Word Count Estimation | 8,849 | | Date of Issue | 2008-06-19 | | Date of Implementation | 2009-02-01 | | Older Standard (superseded by this standard) | GB/T 6023-1999 | | Quoted Standard | GB/T 2366-1986; GB/T 8170; GB/T 13290 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.10 (Total No.123) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the use Karl Fischer coulometric determination of trace amounts of water for industrial use butadiene content. This standard applies to the determination of water by industrial and other four carbon alkene butadiene trace. Measurement range of (5 ~ 500) mg/kg. This standard is not intended to illustrate its use of all safety -related issues. Thus, the user of this standard to establish appropriate should be responsible for security in advance and protective measures, and determine appropriate rules and regulations. | GB/T 6023-2008: Butadiene for industrial use -- Determination of trace water -- Coulometric Karl Fischer method
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Butadiene for industrial use. Determination of trace water. Coulometric Karl Fischer method
ICS 71.080.10
G15
National Standards of People's Republic of China
Replacing GB/T 6023-1999
Butadiene for industrial use - Determination of trace water
Karl Fischer coulometry
Posted 2008-06-19
2009-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 6023-1999 "water for industrial use - Determination of trace butadiene Karl Fischer coulometry."
This standard and GB/T 6023-1999 compared to the main changes are as follows.
--- Detection range from the "(10 ~ 500) mg/kg" to "(5 ~ 500) mg/kg";
--- Increase the use of flash vaporization analyzer sample content;
--- Canceled the injection cylinder, use sampling cylinder direct injection.
The standard proposed by China Petroleum and Chemical Corporation.
This standard by the National Standardization Technical Committee Petrochemical Chemical Club (SAC/TC63/SC4) centralized.
This standard was drafted by the China Petroleum & Chemical Corporation Shanghai Research Institute of Petrochemical.
The main drafters of this standard. Wang Chuan, Li Jia Wei.
This standard replaces the standards previously issued as follows.
--- GB 6023-1985, GB/T 6023-1999.
Butadiene for industrial use - Determination of trace water
Karl Fischer coulometry
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%.
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