GB/T 258-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 258-2025	RFQ	ASK	3 days	(Determination of acidity of light petroleum products)	Valid
GB/T 258-2016	119	Add to Cart	3 days	Standard test method for determination of acidity of light petroleum products	Valid
GB/T 258-1977	70	Add to Cart	Auto, < 3 mins	Determination of acidity of gasoline, kerosene and diesel fuels	Obsolete

Basic data

Standard ID: GB/T 258-2025 (GB/T258-2025)
Description (Translated English): (Determination of acidity of light petroleum products)
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-05-01
Older Standard (superseded by this standard): GB/T 258-2016
Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China

GB/T 258-2016: Standard test method for determination of acidity of light petroleum products

---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.
Standard test method for determination of acidity of light petroleum products ICS 75.160.20 E31 National Standards of People's Republic of China Replacing GB/T 258-1977 Determination of acidity of light petroleum products 2016-06-14 release 2017-01-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 258-1977 "Determination of acidity of gasoline, kerosene and diesel oil". This standard compared with GB/T 258-1977, except Editorial changes to the main technical changes are as follows. --- standard name changed to "light petroleum product acidity determination method"; --- modified the scope of application. GB/T 258-1977 for non-added liquid gasoline, kerosene and diesel, the standard applies to light Quality petroleum products such as gasoline, naphtha, kerosene, diesel and jet fuel; - Added "normative reference documents" "terms and definitions" "Sampling" and "Sample preparation" chapters; --- increased reproducibility, modified repeatability. This standard is proposed by the National Petroleum Products and Lubricants Standardization Technical Committee (SAC/TC280). The drafting unit of this standard. China Petroleum & Chemical Corporation Petrochemical Research Institute. This standard participates in the drafting unit. Shenzhen Institute of Metrology and Quality Inspection, China Petroleum & Chemical Corporation Beijing Yanshan Branch. The main drafters of this standard. Chen Jie, Gu Jie, Lin Yugui, Zhao Yan, Ma Yongxu. This standard replaced the previous version of the standard release. --- GB/T 258-1977. Determination of acidity of light petroleum products WARNING. This standard covers certain hazardous materials, operations and equipment, but is not intended to address all safety issues associated with this Suggest. Therefore, the user should establish appropriate safety and protection measures before applying this standard and determine the applicability of the relevant regulatory restrictions.

1 Scope

This standard specifies the determination of acidity of light petroleum products. This standard applies to light petroleum products such as gasoline, naphtha, kerosene, diesel and jet fuel.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 622 Chemical reagents Hydrochloric acid Petroleum liquid manual sampling method GB/T 4756 Automatic sampling of oil and liquid pipelines GB/T Method for preparation of reagent solution for petroleum product testing SH/T 0079-1991

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Acidity acidity The amount of milligrams of potassium hydroxide required to neutralize 100 mL of light petroleum product is expressed in mg/100 mL.

4 Method summary

Ethanol was used to extract the acid from the light petroleum product. Under the condition of the color indicator, the solution was titrated with potassium hydroxide and ethanol standard set. The acidity is expressed in mg/100 mL units.

5 instruments

5.1 conical flask. 250mL. 5.2 spherical reflux condenser. about 300mm. 5.3 Pipettes. 25 mL, 50 mL and 100 mL. 5.4 micro burette. 2mL, indexing 0.02mL; 3mL, indexing 0.02mL; 5mL, indexing value of 0.05mL. 5.5 hot plate or water bath. 5.6 Balance. can be accurately weighed to 0.001g. ......

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