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GB/T 23510-2009 English PDF (GBT23510-2009)

GB/T 23510-2009 English PDF (GBT23510-2009)

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GB/T 23510-2009: Vehicle fuel methanol

This Standard specifies the requirements, test methods, inspection rules as well as marks, packaging, transport, storage and safety of fuel methanol for motor vehicles. This Standard is applicable to production, inspection and sales of fuel methanol for motor vehicles. This product is used as raw material of fuel methanol for motor vehicles.
GB/T 23510-2009
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 71.080.60
G 16
Fuel methanol for motor vehicles
ISSUED ON: APRIL 08, 2009
IMPLEMENTED ON: NOVEMBER 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 5
4 Test methods ... 6
5 Inspection rules ... 11
6 Marks, packaging, transport, storage ... 12
7 Safety ... 13
Annex A (informative) Determination method for methanol content in fuel methanol for motor vehicles ... 14
Fuel methanol for motor vehicles
1 Scope
This Standard specifies the requirements, test methods, inspection rules as well as marks, packaging, transport, storage and safety of fuel methanol for motor vehicles.
This Standard is applicable to production, inspection and sales of fuel methanol for motor vehicles. This product is used as raw material of fuel methanol for motor vehicles.
Molecular formula: CH4O
Structural formula: CH3-OH
Relative molecular mass: 32.042 (according to 2007 international relative atomic mass)
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB 190, Packing symbol of dangerous goods
GB/T 601-2002, Chemical Reagent - Preparations of Standard Volumetric
Solutions
GB/T 602-2002, Chemical Reagent - Preparations of Standard Solutions for Impurity (ISO 6353-1:1982, NEQ)
GB/T 603-2002, Chemical Reagent - Preparations of Reagent Solution for
Use in Test (ISO 6353-1:1982, NEQ)
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 3723, Sampling of chemical products for industrial use - Safety in Inorganic chlorine content / (mg/L) ??? 1
Sodium content / (mg/kg) ??? 2
Evaporation residue, w/% ??? 0.003
NOTE: When it is necessary to determine the mass fraction of methanol, the test method is shown in Annex A.
4 Test methods
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. The standard titration solutions, preparations and products used in the analysis, when there are no other requirements specified, shall be prepared according to the provisions of GB/T 601-2002 and GB/T 603-2002.
4.3 Determination of appearance
Add experimental samples to a colorimetric tube. Visually observe under sunlight or fluorescent lamp.
4.4 Determination of density
Carry out according to the provisions of the density meter method of GB/T 4472- 1984.
The temperature correction coefficient for the sample density is 0.00093 g/(cm3 ?€? ??C) in the range of 15??C ~ 35 ??C.
Take the arithmetic mean of two parallel determination results as the report result. The difference between the two parallel determination results is not more than 0.0005 g/cm3.
4.5 Determination of boiling range
Perform the determination according to the provisions of GB/T 534-2004. Distillation flask: 100mL; the temperature range of the thermometer is 50??C ~ 70??C; the division value is 0.1??C.
NOTE: For barometer readings, in addition to temperature correction, latitude correction is also required if necessary.
Acidity is based on the mass fraction of formic acid (HCOOH) w1. The value is expressed in %. The alkalinity is based on the mass fraction of ammonia (NH3) w2. The value is expressed in %. They are calculated according to equation (1) and equation (2), respectively:
Where,
V1 - The volume of the sample consumed by the sodium hydroxide standard titration solution (4.7.2.1), in milliliters (mL);
c1 - The exact value of the concentration of sodium hydroxide standard titration solution, in moles per liter (mol/L);
M1 - The value of the molar mass of formic acid, in grams per mole (g/mol) (M1 = 46.02);
??1 - The density of the sample at the temperature t is measured in grams per cubic centimeter (g/cm3);
V2 - The value of the volume of the sulfuric acid standard titration solution (4.7.2.2), in milliliters (mL);
c2 - The accurate value of sulfuric acid standard titration solution concentration, in moles per liter (mol/L);
M2 - The value of the molar mass of ammonia, in grams per mole (g/mol) (M2 = 17.03);
V - The volume of the sample, in milliliters (mL) (V=50).
Take the arithmetic mean of two parallel determination results as the
measurement result. The relative deviation of the results of two parallel determinations is not more than 30%.
4.8 Determination of inorganic chlorine content
4.8.1 Precipitation titration
4.8.1.1 Method summary
In the range of neutral to weakly alkaline (pH 6.5~10.5), use potassium chromate as indicator. When titrating chloride with silver nitrate, because the same amount of reagent solution for blank test.
4.8.1.4 Result calculation
Chloride content w3, expressed in mg/L, is calculated according to equation (3): where,
V1 - The volume of blank consumption of silver nitrate standard titration solution (4.8.1.2.4), in milliliters (mL);
V2 - The volume of silver nitrate standard titration solution consumed by sample, in milliliters (mL);
c - The exact value of the concentration of silver nitrate standard titration solution, in moles per liter (mol/L);
V - The volume of sample, in milliliters (mL);
M - The molar mass of chlorine, in grams per mole (g/mol) (M=35.45).
Take the arithmetic mean of two parallel determination results as the
measurement result. The absolute difference between two parallel
determination results is not more than 0.1 mg/L.
4.8.2 Potentiometric titration (arbitration method)
4.8.2.1 Method summary
Take the glass electrode as the reference electrode and the silver electrode as the indicator electrode. Use silver nitrate standard titration solution to titrate the chloride ion in the sample. Determine the titration end point according to the potential jump point (second-order derivative method). Calculate the chloride ion content of the sample according to the consumption of the silver nitrate standard titration solution.
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.
Take the arithmetic mean of two parallel determination results as the report result. The difference between two parallel determination results is not more than 0.1 mg/L.
production date or batch number, net content and reference to this Standard. 5.3 Under the conditions of unchanged raw materials and processes, the actual batch of continuous production of products shall be one batch. However, several production batches usually constitute one inspection batch, usually no more than one day.
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. If one of the inspection results does not meet the requirements of this Standard, the barreled product shall be re-sampled from the double-packaged unit for inspection; canned products shall be re-sampled from multiple points for inspection. Even one indicator in re-inspection results fails to meet the requirements of this Standard, the whole batch of products shall be unqualified.
6 Marks, packaging, transport, storage
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.
6.2 Packaging
It shall be packed in a special clean and dry container. The packaging container shall be tightly sealed.
6.3 Transport
6.3.1 Do not mix and transport with flammable, explosive, corrosive materials during transport.
6.3.2 Inhalation of external moisture shall be prevented during transport. 6.3.3 It shall be lightly loaded and unloaded during loading and unloading to prevent violent shocks and impacts. Keep away from heat and fire. Transport, loading and unloading shall be carried out in accordance with the provisions on Annex A
(informative)
Determination method for methanol content in fuel methanol for motor
vehicles
A.1 Scope
This test method specifies gas chromatography for the determination of
methanol content and impurity content in fuel methanol for motor vehicles. The method is suitable for the determination of the sample of which the mass fraction of impurities in the vehicle fuel methanol is 0.0005% ~ 3%. Gas chromatography does not guarantee the determination of all impurity
components in fuel methanol for motor vehicles, especially non-volatile components or components of weak signals detected by flame ionization
detector or components without detection signals.
A.2 Method summary
Use gas chromatography. Under the selected working conditions, the sample is vaporized through a capillary column. The components are separated and detected by hydrogen and flame ionization detector. Determine the quantitative correction factor. Calculate the mass fraction of the impurity component according to the internal standard method or the external standard method. Subtract the mass fraction of impurities and water by 100 shall be the mass fraction of methanol.
A.3 Reagents
A.3.1 Isopropanol: chromatographically pure, internal standard.
A.3.2 Ethyl acetate: chromatographically pure, internal standard.
A.3.3 Methanol: mass fraction not less than 99.98%; the mass fraction of ethanol does not exceed 0.001%; if the ethanol content is greater than this amount, the background shall be subtracted.
A.3.4 Hydrogen: volume fraction is not less than 99.9%, dried and purified by silica gel and molecular sieve.
A.3.5 Nitrogen: volume fraction is not less than 99.95%, dried and purified by silica gel and molecular sieve.
A.3.6 Air: dried and purified by silica gel and molecular sieve.

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