GB/T 23510-2009Vehicle fuel methanol (English PDF)

4.1 Warning

Some test procedures specified in the test method may lead to dangerous

situations. The operator shall take appropriate safety and protective measures.

4.2 General provisions

Unless otherwise stated, only reagents that are confirmed as analytically pure

and Grade three water specified in GB/T 6682-2008 are used in the analysis.

4.3 Determination of appearance

Add experimental samples to a colorimetric tube. Visually observe under

sunlight or fluorescent lamp.

4.7 Determination of acidity or alkalinity

4.7.1 Method summary

Sample is diluted by carbon dioxide free water. Use bromothymol blue as an

indicator. When the sample is acidic, use sodium hydroxide standard titration

solution to titrate free acid. When the sample is alkaline, use sulfuric acid

standard titration solution to titrate free base.

4.7.2 Reagents

4.7.4 Analysis steps

4.7.4.1 Use an equal volume of carbon dioxide free water to dilute laboratory

sample. Add (4~5) drops of bromo thymol blue indicator solution in identify. If it

is yellow, it shall be acidic reaction, and measure the acidity. If it is blue, it shall

be alkaline reaction, then measure the alkalinity.

4.8 Determination of inorganic chlorine content

4.8.1 Precipitation titration

4.8.1.3 Analysis steps

4.8.1.3.1 Sample processing

Take 300mL of sample in porcelain evaporating dish. Use sodium hydroxide

solution to adjust the pH to 8-9.Steam on a water bath to dry. Put in the muffle

furnace. Burn at 600°C for 1h. Cool. Use 70mL of water to soak for 20min. Then

use 30mL of water to rinse the evaporating dish in three times. Make

quantitative transfer to a 250mL Erlenmeyer.

4.8.1.4 Result calculation

Chloride content w3, expressed in mg/L, is calculated according to equation (3).

where,

4.8.2.2 Analysis steps

Instruments and equipment, reagents and solutions, operating procedures and

results calculation are performed in accordance with the first method of Annex

C of GB 18350-2001.

4.9 Determination of sodium content

Perform the determination according to the provisions of GB/T 17476-1998.The

preparation of sample is. Weigh two samples separately. Add appropriate

amount of internal standard elements. Shake well. The recommended

wavelength is 589.59 nm.

5.1 The inspection is divided into exit-factory inspection and type inspection.

5.1.1 The exit-factory inspection items in Table 1 - appearance, density, boiling

range, moisture, acidity or alkalinity - shall be inspected batch by batch.

5.1.2 The type inspection items are all items in Table 1.In the case of normal

production, type inspection shall be carried out at least once every three months.

Type inspection shall also be carried out in any of the following cases.

5.2 Vehicle fuel methanol is inspected by the quality inspection department of

the manufacturer.

5.4 Sampling shall be carried out according to the provisions of GB/T 3723,

GB/T 6678-2003 and GB/T 6680-2003.The total amount of samples shall not

be less than 1L. After thoroughly mixing the samples, they are dispensed into

two clean, dry, ground-filled glass bottles. Label the manufacturer's name,

product name, batch number, sampling date, and sampler's name. One bottle

is for analysis and inspection; another bottle is for future reference.

5.5 The determination of the test results shall be carried out according to the

comparison method of the repair value specified in GB/T 1250.

6.1 Marks

The packaging container for vehicle fuel methanol product shall be coated with

a firm mark. The content of the mark shall include manufacturer's name, product

name, reference to this Standard, trademark, batch number, net weight and the

"flammable liquid" and "drug" signs specified in GB 190.

6.3 Transport

6.3.1 Do not mix and transport with flammable, explosive, corrosive materials

during transport.

6.4 Storage

6.4.1 The product shall be stored in a dry, ventilated place at low temperature,

away from direct sunlight, heat source and fire. The reservoir area shall meet

the requirements of the national fire protection design code. Open storage tanks

shall have spray water or other cooling facilities.

7.1 Hazard warning

Fuel methanol for motor vehicles is a flammable liquid. The flash point is 8°C

and the auto-ignition temperature is 436°C. Explosion limit in air is 6% ~ 36.5%

(volume fraction).

7.2 Safety measures

When the fuel methanol for motor vehicles overflows, immediately use water to

wash. When the fire is on, use sand, dry powder or anti-solvent foam fire

extinguisher, asbestos cloth to put out the fire.

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