This standard specifies the technical conditions for automotive ethanol gasoline, which is made by adding a certain amount of denatured fuel ethanol and additives to improve performance into liquid hydrocarbons without oxygenated compounds. This standard is applicable to the fuel of spark-ignition internal combustion engines. GB 18351-2004 Automotive ethanol gasoline GB18351-2004 standard download decompression password: www.bzxz.net

All technical contents of this standard are mandatory. Foreword
This standard replaces GB18351-2001 "Ethanol Gasoline for Vehicles". The main differences between this standard and GB18351--2001 are as follows: the brand number is increased to 97, the anti-knock index is set as "report"; - ethanol content (volume fraction) is 10.0%±2.0%, - other oxygen-containing compound content (mass fraction) is not more than 0.1%, and the water content (mass fraction) is revised from 0.15% to not more than 0.20%. GB18351-2004
From the date of implementation of this standard, the products produced by the production enterprises shall comply with this standard; from December 1, 2004, the products that do not meet this standard shall be stopped from being sold on the market.
Appendix A of this standard is an informative appendix. This standard is proposed by the State Administration of Standardization. This standard is under the jurisdiction of the Petroleum and Chemical Research Institute of China Petroleum and Chemical Corporation. The main drafting unit of this standard: Petroleum and Chemical Research Institute of China Petroleum and Chemical Corporation. The main drafters of this standard are Yang Guoxun and Zhang Yongguang. This standard was first issued in 2001.
1 Scope
Ethanol gasoline
GB 18351--2004
This standard specifies the technical conditions for automotive ethanol gasoline composed of a certain amount of denatured fuel ethanol and additives to improve performance in liquid hydrocarbons without oxygenated compounds. This standard is applicable to fuel for automotive spark-ignition internal combustion engines. 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T256 Determination of gasoline induction period
GB/T 259
GB/T 380
GB/T503
GB/T 511
Determination of water-soluble acids and bases in petroleum products
Determination of sulfur content in petroleum products (lamp method)Determination of gasoline octane number (motor method)
Determination of mechanical impurities in petroleum products and additives (gravimetric method)GB/T 1792
Determination of mercaptan sulfur in distillate fuels (potentiometric titration method)GB/T 4756
Manual sampling method for petroleum liquids (GB/T4756--1998, eqvISO3170:1988)GB/T 5096
Test method for copper strip corrosion of petroleum products
GB/T 5487
Determination of gasoline octane number (research method)
Determination of petroleum products by distillation
GB/T 6536
GB/T 8017
Determination of vapor pressure of petroleum products (Reid method)GB/T 8018
Determination of gasoline oxidation stability (induction period method)GB/T 8019
Determination of actual colloid content of gasoline for motor vehicles and aviation fuel (jet evaporation method) (GB/T8019-1987, neq 1SO 6246: 1981)
GB/T 8020
Determination of lead content in gasoline (atomic absorption spectrometry)GB/T 11132
GB/T 11140bZxz.net
GB/T17040
Determination of hydrocarbons in liquid petroleum products (fluorescent indicator adsorption method)Determination of sulfur content in petroleum products (X-ray spectrometry)Determination of sulfur content in petroleum products (energy dispersive X-ray fluorescence spectrometry)0Unleaded gasoline for vehicles
GB17930
GB18350
SH 0164
Denatured fuel ethanol
Rules for packaging, storage, transportation and delivery acceptance of petroleum productsSH/T 0174
Qualitative test method for mercaptans in aromatic hydrocarbons and light petroleum products (PhD test method) (SH/T0174--1992, eqvISO5275:1979)
SH/T 0246
Determination of water content in light petroleum products (coulometry)SH/T0253Determination of total sulfur content in light petroleum products (coulometry)SH/T 0663
Determination of certain alcohols and aldehydes in gasoline (gas chromatography)SH/T0689Determination of total sulfur content in light hydrocarbons, engine fuels and other oil products (ultraviolet fluorescence method)SH/T0693Determination of aromatic hydrocarbons in gasoline (gas chromatography)SH/T0711Determination of manganese content in gasoline (atomic absorption spectrometry)GB 18351-2004
SH/T0712Determination of iron content in gasoline (atomic absorption spectrometry)SH/T0713Determination of benzene and toluene content in motor gasoline and aviation gasoline (gas chromatography)SH/T0741Determination of hydrocarbon composition in gasoline (multidimensional gas chromatography)SH/T 0742
3 Brand
Determination of sulfur content in gasoline (energy dispersive X-ray fluorescence spectrometry)Ethanol gasoline for automobiles is divided into four brands according to the research octane number: 90, 93, 95 and 97. 4 Terms and definitions
This standard adopts the following terms and definitions.
Antiknock indexantiknockindex
Half of the sum of the research octane number and the motor octane number4.2
ethanol gasoline
Ethanol gasoline
Adding a certain amount of denatured fuel ethanol to liquid hydrocarbons without adding oxygen-containing compounds and used as fuel for spark-ignition internal combustion engines, the added amount (volume fraction) is 10.0%, called E10.4.3
Denatured fuel ethanol
denatured fuel ethanol
Ethanol that cannot be drunk after adding denaturants and can only be used as fuel. 5 Technical requirements
5.1 The products covered by this standard are only allowed to add denatured fuel ethanol that complies with GB18350, and the added amount (volume fraction) is 10.0%0.5%. The on-site rapid determination method is shown in Appendix A. 5.2 Other technical requirements of this standard are shown in Table 1. Technical requirements for ethanol gasoline for vehicles
Anti-knock performance:
Research octane number (RON)
Anti-knock index (RON+MON)/2
Lead content:/(g/L)
10% evaporation temperature/℃
50% evaporation temperature/℃
90% evaporation temperature/℃
Final distillation point/℃
Residue (volume fraction)/%
Vapor pressure/kPa
From September 16 to March 15
From March 16 to September 15
Actual colloid/(mg/100mL)
not less than
not less than
not greater than
not higher than
not higher than
not higher than
not higher than
not greater than
not greater than
not greater than
not greater than
Test method
GB/T5487
GB/T503
GB/T8020
GB/T6536
GB/T8017
GB/T 8019
Induction period/min
Sulfur content (mass fraction)°/%
Mercaptan (must meet one of the following requirements):
Doctoral test
Mercaptan sulfur content (mass fraction)/%
Copper sheet corrosion (50℃, 3h))/level
Water-soluble acid or alkali
Mechanical impurities
Water (mass fraction)/%
Ethanol content (volume fraction)/%
Other oxygen-containing compounds (mass fraction)/%
Benzene content (volume fraction)/%||tt ||Aromatic hydrocarbon content (volume fraction)\/%
Olefin content (volume fraction)*/%
Manganese content/(name/L)
Iron content/(g/L)
Table 1 (continued)
Not less than
Not more than
Not more than
Not more than
Not more than
Not more than
Not more than
Not more than
This standard specifies the maximum limit of lead content, but intentional addition of lead is not allowed. a
Quality index
(No. 95
10.0±2.0
The induction period is allowed to be measured by GB/T256 method, and the arbitration test shall be based on the measurement results of GB/T8018 method. No. 97
GB 18351--2004
Test method
GB/T 8018
GB/T380
GB/T 11140
GB/T 17040
SH/T0253
SH/T 0689
SH/T 0742
SH/T 0174
GB/T 1792
GB/T5096
GB/T259
Visual inspection d
SH/T0246
SH/T0663
SH/T0663
SH/T 0693
SH/T 0713
GB/T 11132
SH/T 0741
GB/T 11132
SH/T 0741
SH/T0711
SH/T 0712
The sulfur content can be determined by GB/T11140, GB/T17040, SH/T0253, SH/T0689 and SH/T0742 methods. The arbitration test shall be based on the results of GB/T 380 method.
dPour the sample into a 100 ml glass volume for observation. It should be transparent without suspended and settled organic impurities and stratification. In case of objection, the results of GB/T511 method shall prevail.
eMethanol shall not be added artificially.
Benzene content is allowed to be determined by SH/T0713, and the arbitration test is based on the results of SH/T0693 method. gL-Hydrocarbon content and olefin content are allowed to be determined by SH/T 0741, and the arbitration test is based on the results of GB/T11132 method. hManganese content refers to the total manganese content in gasoline in the form of methylcyclopentadienyl manganese tricarbonyl (MMT). Manganese-containing gasoline should be protected from light during storage, transportation and sampling.
Iron shall not be added artificially.
GB18351—2004
Marking, packaging, transportation, purchase and storage
Marking, packaging, transportation, storage and delivery acceptance shall be carried out in accordance with SH0164. Ethanol gasoline for vehicles that meets this standard must use special pipelines, containers and pumps during transportation and storage. The seals and materials of these storage tanks, pumps, pipelines and meters must meet the requirements of ethanol gasoline. During storage and transportation, the entire system must be kept clean and free of water. If phase separation occurs, the separated water phase must be sent to a special wastewater treatment plant for treatment. All refueling pumps and containers used to sell automotive ethanol gasoline that meets this standard to users should be marked with the following signs: "E10 ethanol gasoline No. 90", "E10 ethanol gasoline No. 93", "E10 ethanol gasoline No. 95" or "E10 ethanol gasoline No. 97", and should be marked in a place that is easily visible to car drivers. 7 Sampling
Sampling shall be carried out in accordance with GB/T4756, and 41 shall be taken for inspection and retention. 4
A.1 Scope
Appendix A
(Informative Appendix)
Determination of the content of denatured fuel ethanol in automotive ethanol gasoline (on-site rapid method) This standard specifies the method for rapid on-site determination of the content of denatured fuel ethanol in automotive ethanol gasoline. This method is applicable to automotive ethanol gasoline with a denatured fuel ethanol content (volume fraction) of less than 20%. A.2 Method Overview
GB18351—2004
Place the specified volume of sample and distilled water in a stoppered measuring cylinder and mix them evenly. Then let it stand for 20 minutes. The mixture will separate into two phases, oil and water. Record the volume of the water phase. The content of denatured fuel ethanol can be obtained through the relationship diagram between the volume of the water phase and the content of denatured fuel ethanol. A.3 Apparatus
A.3.1 Stoppered measuring cylinder: 100mL, graduation is 1.0mL. A.3.2 Pipette: 10mL.
A.3.3 Water bath: 35℃~40℃.
A.4 Materials
Distilled water.
A.5 Test Procedure
A.5.1 Use a 100mL stoppered measuring cylinder to measure 100mL of sample, accurate to 0.5mL. A.5.2 Use a 10mL pipette to measure 10mL of distilled water and add it to the stoppered measuring cylinder. A.5.3 Turn the stoppered measuring cylinder upside down 20 times (about 0.5min) to mix it evenly. Then let the mixture stand for 20min to separate into two phases of oil and water with clear interfaces.
Note 1: Danger (warning) - The sample is flammable and explosive and should be kept away from heat sources and open flames. The sample vapor is toxic and should be carefully avoided as much as possible. The container should be sealed and kept ventilated during use.
Note 2: Because the sample will produce volatile gas during the shaking process, the stopper of the stoppered measuring cylinder should be loosened after mixing evenly to allow the gas to evaporate to prevent it from popping out.
Note 3: If the room temperature is low, the mixture may take a long time to separate. It can be placed in a water bath at 35℃~40℃ before measurement! A.5.4 Record the volume of the water phase, accurate to 0.5 mlA.6 Calculation
In the water phase volume-denatured fuel ethanol content relationship diagram A.1, find the corresponding denatured fuel ethanol content from the water phase volume, expressed as volume fraction (%). Accurate to 0.1%.
A.7 Report
Take the arithmetic mean of the two repeated determination results as the denatured fuel ethanol content of the sample, expressed as volume fraction (%). Accurate to 0.1%.
GB 18351--2004
Water phase volume/ml
Water phase volume-denatured fuel ethanol content relationship diagram 241%.
GB 18351--2004
Water phase volume/ml
Water phase volume-denatured fuel ethanol content relationship diagram 241%.
GB 18351--2004
Water phase volume/ml
Water phase volume-denatured fuel ethanol content relationship diagram 24
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