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GB/T 1792-2015 English PDF

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GB/T 1792-2015: Determination of mercaptan sulfur in gasoline, kerosine, jet, and distillate fuels -- Potentiometric method
Status: Valid

GB/T 1792: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 1792-2015English319 Add to Cart 3 days [Need to translate] Determination of mercaptan sulfur in gasoline, kerosine, jet, and distillate fuels -- Potentiometric method Valid GB/T 1792-2015
GB/T 1792-1988English199 Add to Cart 3 days [Need to translate] Distillate fuels. Determination of mercaptan sulphur. Potentiometric titration method Obsolete GB/T 1792-1988

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Basic data

Standard ID GB/T 1792-2015 (GB/T1792-2015)
Description (Translated English) Determination of mercaptan sulfur in gasoline, kerosine, jet, and distillate fuels -- Potentiometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E31
Classification of International Standard 75.160.20
Word Count Estimation 15,192
Date of Issue 2015-12-31
Date of Implementation 2016-05-01
Older Standard (superseded by this standard) GB/T 1792-1988
Regulation (derived from) State Standard Announcement 2015 No.43
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

GB/T 1792-2015: Determination of mercaptan sulfur in gasoline, kerosine, jet, and distillate fuels -- Potentiometric method


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Determination of mercaptan sulfur in gasoline, kerosine, jet, and distillate fuels - Potentiometric method ICS 75.160.20 E31 National Standards of People's Republic of China Replacing GB/T 1792-1988 Gasoline, kerosene, jet fuel and distillate fuel Mercaptan sulfur by potentiometric titration Determinationofmercaptansulfuringasoline, kerosine, jet, and Issued on. 2015-12-31 2016-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with the rules of GB/T 1.1-2009 given. This standard replaces GB/T 1792-1988 "Determination of mercaptan sulfur distillate fuel (potentiometric titration)", and GB/T 1792-1988 phase Technology than the main changes are as follows. --- Standard name was changed to "gasoline, kerosene, jet fuel and distillate fuel mercaptan sulfur by potentiometric titration"; --- Increasing the measurement method using automatic titration system (see 4.1,8.2.3 and 8.3); --- Increased in relation to light gasoline sample containing methyl mercaptan or methanethiol above mercaptan (see 6.2, 6.3 and 10.4); --- Alternative methods for increasing the non-quorum purpose of removing hydrogen sulfide (see 8.2.2 and Appendix A); --- Increasing the titration end point is reached nearly 300mV content (see 8.3.4, Chapters 9 and 10); --- Increasing the blank titration content to improve the measurement accuracy (see 8.4); --- Increase the formula to calculate the volume of the sample mercaptan sulfur content and measurement results is calculated after dilution of the sample (see 9.1); --- Modify the provisions of the titration curve end point; GB/T 1792-1988 the provisions on end were as follows. each of the titration curve The maximum value "turning point" for the steepest at the end; the end of this standard regarding amended as follows. In each of the titration curve "mutation" most Inflection point as the end of the steep part (see 101, 1988 edition 6.1.); --- Increasing the quality assurance/quality control of content (see Chapter 11 and Appendix B); --- Modify the content of the report; GB/T 1792-1988 details about the report. taking repeated measurements arithmetic mean of the two results Value, as mercaptan sulfur content in the sample; this standard on contents of the report amended as follows. report measurement results are accurate to the mass fraction 0.0001%, or 1mg/kg (see Chapter 12, Section 9 of the 1988 edition). This standard by the National Standardization Technical Committee on products and lubricant oil (SAC/TC280) proposed. This standard by the National Petroleum Products and Lubricants Standardization Technical Committee of petroleum fuels and lubricants Technical Committee (SAC/TC280/SC1) centralized. This standard was drafted. China Petroleum & Chemical Corporation Research Institute of Petroleum. The main drafters of this standard. Pan Guangcheng. This standard replaces the standards previously issued as follows. --- GB/T 1792-1979; GB/T 1792-1988.

Introduction

Mercaptan sulfur has an unpleasant odor, harmful to the fuel system of an elastic material, and fuel system component corrosion. Gasoline, kerosene, jet fuel and distillate fuel Mercaptan sulfur by potentiometric titration WARNING --- This standard may involve the use of certain hazardous materials, operations and equipment, but not all security related thereto ask Questions are recommendations. Users before you apply this standard has the responsibility to develop appropriate security and protection measures, and determine the relevant regulatory limits applicability.

1 Scope

This standard specifies the determination of mercaptan sulfur content of the fuel by potentiometric titration method. This standard applies to gasoline, kerosene, jet fuel and distillate fuel, mercaptan sulfur content measurement range from 0.0003% 0.01%. Organic sulfur compounds such as sulfides, disulfides and thiophenes, do not interfere with the determination. The mass fraction of less than 0.0005% of the elemental sulfur is not Interfere with the determination. If the removal of hydrogen sulfide measured interference, see the removal of hydrogen sulfide 8.2.

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 1884 crude oil and liquid petroleum products - Laboratory determination of density (density meter method) GB/T 1885 Petroleum Measurement Tables GB/T 4756 petroleum liquids hand sampling method Laboratory use specifications and test methods GB/T 6682-2008 Analysis GB/T 27867 liquid petroleum pipeline automatic sampling SH/T 0604 crude oil and petroleum products densitometry (U-shaped vibrating tube method)

3 Method Summary

The hydrogen sulfide-free sample was dissolved in isopropyl alcohol titration of sodium acetate solvent to a glass reference electrode and a silver/silver sulfide directions between the electrodes Potential as directed by alcohol standard solution of silver nitrate titration meter through potential. During the titration, mercaptan sulfur precipitate as silver mercaptan, and drops By the end of a given mutation on the potential of the battery is displayed.

4 Instrument

4.1 potentiometric titration instrument see 4.2 to 4.5. Or, as long as the use of electrodes in line with the requirements of 4.3 and may require dropping Chapter 8 Fixed end point in line with the provisions of 10.1, and its measurement accuracy meets or exceeds the requirements of Chapter 13, any automatic titration system can be used. 4.2 Instrument. Electronic voltmeter, less than 9 × 10-12A current input operation, the range of at least ± 1V, accuracy ± 2mV. Table should Antistatic protective housing and protective housing should be grounded. 4.3 Battery system. the reference electrode and the indicator electrode composition ratio. The reference electrode should be sturdy pen glass electrode having a grounded shield conductor line. Indicator electrode fixed in the insulating housing having a diameter of 2mm or thicker than the silver material. You can also use silver bullion electrodes.

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