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GB/T 11146-2009: Crude petroleum -- Determination of water -- Coulometric Karl Fischer titration method
Status: Valid GB/T 11146: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 11146-2009 | English | 299 |
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Crude petroleum -- Determination of water -- Coulometric Karl Fischer titration method
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GB/T 11146-2009
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| GB/T 11146-1999 | English | 319 |
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Crude oils--Determination of water--Karl fischer reagent method
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GB/T 11146-1999
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| GB 11146-1989 | English | RFQ |
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Crude oils--Determination of water--Karl Fischer reagent method
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Crude oils--Determination of water--Karl Fischer reagent method
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PDF similar to GB/T 11146-2009
Basic data | Standard ID | GB/T 11146-2009 (GB/T11146-2009) | | Description (Translated English) | Crude petroleum -- Determination of water -- Coulometric Karl Fischer titration method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E21 | | Classification of International Standard | 75.040 | | Word Count Estimation | 13,126 | | Date of Issue | 2009-03-16 | | Date of Implementation | 2009-10-01 | | Older Standard (superseded by this standard) | GB/T 11146-1999 | | Quoted Standard | GB/T 4756-1998; SY/T 5317-2006; ISO 3733-1999; ISO 3734-1997; ISO 3696-1987 | | Adopted Standard | ISO 10337-1997, MOD | | Regulation (derived from) | National Standard Approval Announcement 2009 No.2 (Total No.142) | | 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 method for the determination by Karl Fischer coulometric titration of water content in crude oil directly. For the amount of mercaptan sulfur or divalent sulfur content of sulfur ions, or both (mass fraction) of crude oil in the range of 0. 005% to 0. 05%, the method of water measurement range (mass fraction) is 0. 050 %-5. 00%, the amount of mercaptan sulfur or sulfur ions of divalent sulfur content, or both (mass fraction) of less than 0. 005% of the crude oil, the method of water measurement range (mass fraction) is 0. 020% to 5. 00 %. Application of this standard may involve hazardous substances, operations and equipment, but the standard does not explain its use of all safety issues. | GB/T 11146-2009: Crude petroleum -- Determination of water -- Coulometric Karl Fischer titration method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Crude petroleum. Determination of water. Coulometric Karl Fischer titration method
ICS 75.040
E21
National Standards of People's Republic of China
Replacing GB/T 11146-1999
Determination of water content of crude oil
Karl Fischer coulometric titration
(ISO 10337.1997, MOD)
Posted 2009-03-16
2009-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts ISO 10337.1997 "Determination of crude water Karl Fischer coulometric titration method" (in English).
This standard and ISO 10337.1997 main differences are as follows.
--- The standard Chapter 8 Formula Notes ρ, the density specified by the standard measurement of temperature, the temperature of the "15 ℃" to "20 ℃",
This modification has no effect on the precision of the results.
This standard ISO 10337.1997 made the following editorial changes.
--- "This International Standard" be replaced by "this standard";
"." --- With a decimal point instead of a comma as the decimal point, "";
--- Delete the directory and introduction of international standards;
--- Repeatability and reproducibility textual representation by our habits were modified.
This standard replaces GB/T 11146-1999 "oil Determination of water (Karl Fischer method)."
This standard GB/T 11146-1999 The main amendments are as follows.
--- By coulometric titration method instead of the capacity of the titration;
--- For interference sulfides is described in detail;
--- Increased the sample processing step mixer and mixed sample description;
--- According to ISO 10337.1997, the method for measuring range, volume and sampling precision has been modified.
SY/T 5317-2006 Petroleum liquids pipeline automatic sampling method (ISO 3171. 1988, IDT)
ISO 3696. 1987 --- analytical laboratory use specifications and test methods
ISO 3733.1999 Petroleum products and bituminous materials - Determination of water --- --- distillation
Determination --- centrifugation water and sediment in residual fuel oils of petroleum products in 1997. ISO 3734
Principle 3
Crude oil through the mixer after mixing, weighed amount of sample is injected into the coulometer Karl Fischer titration cell, the anode electrolysis Health
As for iodine Karl Fischer coulometric response. When all the water has been titrated, the excess iodine by the end of charge detector, the end of the titration.
Based on the stoichiometry of the reaction, 1 mole of iodine and 1 mole of water reaction. The water content of the sample can be calculated according to Faraday's law.
4 Reagents
4.1 xylene, AR
4.2 Karl Fischer coulometric reagent
Using commercially available reagents meet the performance requirements of 7.3.
4.2.1 anolyte
A commercial Karl Fischer Coulomb anolyte and xylene by volume mixing ratio of 6.4. If meet the performance requirements of 7.3, also allows
Other proportion of Karl Fischer coulometric anolyte and xylene mixture.
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