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GB/T 6324.4-2008: Test method of organic chemical products -- Part 4: Determination of trace sulfur in organic liquid products -- Micro-coulometric method
Status: Valid GB/T 6324.4: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 6324.4-2008 | English | 139 |
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Test method of organic chemical products -- Part 4: Determination of trace sulfur in organic liquid products -- Micro-coulometric method
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GB/T 6324.4-2008
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| GB/T 6324.4-1986 | English | 239 |
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Determination of trace sulphur in products of organic liquid--Micro-coulometry method
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GB/T 6324.4-1986
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PDF similar to GB/T 6324.4-2008
Basic data | Standard ID | GB/T 6324.4-2008 (GB/T6324.4-2008) | | Description (Translated English) | Test method of organic chemical products -- Part 4: Determination of trace sulfur in organic liquid products -- Micro-coulometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G15 | | Classification of International Standard | 71.040 | | Word Count Estimation | 6,625 | | Date of Issue | 2008-05-14 | | Date of Implementation | 2008-10-01 | | Older Standard (superseded by this standard) | GB/T 6324.4-1986 | | Quoted Standard | GB/T 6682-1992; GB/T 8170-1987 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.8 (Total No.121) | | 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 test methods for trace organic liquid product sulfur was determined by Microcoulometry. GB/T 6324 applies to this part of the sulfur content of organic liquid product samples within 0. 5mg/kg ~ 1000mg/kg range. | GB/T 6324.4-2008: Test method of organic chemical products -- Part 4: Determination of trace sulfur in organic liquid products -- Micro-coulometric method
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Test method of organic chemical products Part 4. Determination of trace sulfur in organic liquid products Microcoulometric method
ICS 71.040
G15
National Standards of People's Republic of China
Replacing GB/T 6324.4-1986
Test Method for Organic chemical products
Part 4. organic liquid chemical products, trace sulfur
Determination of micro coulometry
Posted 2008-05-14
2008-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 6324 is divided into six sections.
--- Part 1. Liquid water-miscible organic chemical products test;
--- Part 2. Determination of the volatile organic liquid residue after evaporation of the water bath dry;
--- Part 3. Organic Chemical method for the determination of potassium permanganate reducing substance;
--- Part 4. Liquid organic products - Determination of trace sulfur Microcoulomb;
--- Part 5. Organic chemical products of carbonyl compounds content - Volumetric method;
--- Part 6. Organic chemical products Spectrophotomeric carbonyl compounds content.
This section GB/T 46324 Part of.
This Part replaces GB/T 6324.4-1986 "organic liquid products - Determination of trace sulfur Microcoulometry."
This portion of the GB/T 6324.4-1986 compared to the main changes are as follows.
--- Expanding the scope of the standard (see Chapter 1);
--- Canceled instrument diagram (3.1, Chapter 5 of this edition 1986 edition);
--- Increased dibenzothiophene and dibutyl sulfide material and two standard iso-octane and cetane two solvents (see 4.5 and 4.6);
--- Increase the types of electrolyte (see 4.4);
--- Redefined the scope of the reaction conditions (1986 version 5.1.4, this version 6.2);
--- Redefined repetitive sample, increasing the reproducibility (1986 edition, Chapter 6, Section 8 of this edition).
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Standardization Technical Committee on Organic Chemistry Club (SAC/TC63/SC2) centralized.
This section drafted by. China PetroChina Liaoyang Petrochemical Company.
The main drafters of this section. Liudian Li, Yang Dan, Li Ju, Hongli Jing, Li Changjun.
This section was first issued in 1986.
Test Method for Organic chemical products
Part 4. organic liquid chemical products, trace sulfur
Determination of micro coulometry
1 Scope
GB/T 6324 This section specifies the test methods for trace sulfur in organic liquid product was determined by Microcoulometry.
GB/T 6324 This section applies to the sulfur content in organic liquid product sample in the 0.5mg/kg ~ 1000mg/kg range.
2 Normative references
The following documents contain provisions by GB/T 6324 this part of the reference in terms of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
Laboratory use - Specification and test methods (. 1987 neq ISO 3696) GB/T 6682-1992 Analysis
GB/T 8170-1987 numerical rounding rules
3 PRINCIPLE OF THE METHOD
Samples gasification stage gasification cracking tube and mixed with a carrier gas into the combustion zone is mixed with oxygen and burned, the sulfur is converted to sulfur dioxide, with a carrier gas
Went into the titration cell, the electrolyte triiodide ion (I3-) the following reaction.
I3- + SO2 + H2 → O SO3 + 3I- + 2H +
Titration cell triiodide ion (I3-) concentration decreased, indicating - an indication of the reference electrode and the change and given bias compared this
Microcoulometry signal is input to the amplifier and amplified output voltage is applied to the electrodes for electrolysis, electrolysis at the anode the following reaction.
3I → - I3- + 2e
Consumed triiodide ion (I3-) replenished, the consumption of electricity is the time integral of the electrolysis current, according to Faraday's law of electrolysis
Calculate the sulfur content of the sample.
4 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical reagents and GB/T 6682-1992 the provisions of secondary water.
4.1 Carrier gas. nitrogen, argon or helium, the volume fraction of not less than 99.5%.
4.2 Oxygen. volume fraction of not less than 99.5%.
4.3 electrolyte 1. 0.5g of potassium iodide, add a little water to dissolve, add 4mL acetic acid solution (1 + 9), diluted with water to 1000mL,
Load brown bottle, stored in a cool dark place, the use of a period not exceeding one month. Suitable halogen content of less than 60μg/mL, the small total nitrogen content
At 100μg/mL, heavy metals (nickel, vanadium, lead) content is less than 500mg/kg of the sample.
4.4 electrolytic solution 2. 0.5g of potassium iodide, 0.6 g of sodium azide, dissolved in 500mL of water, adding 5mL of glacial acetic acid, diluted with water to
1000mL, loaded brown bottle, stored in a cool dark place, the use of a period not exceeding one month. Suitable halogen content of the sulfur content of less than
10 times, the total nitrogen content of less than 1000 times the sulfur content of heavy metals (nickel, vanadium, lead) content is less than 500mg/kg of the sample.
4.5 Standard substance. dibenzothiophene (C6H4C6H4S), thiophene (C4H4S) or dibutyl disulfide (C4H9C4H9S2), etc., the mass fraction of
Not less than 98%.
4.6 solvent. iso-octane, n-heptane or hexadecane and the like. Sulfur-free solvent integrated value displayed under test conditions.
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