ASTM E346 Analysis of Methanol

The standard test methods for the analysis of methanol are covered under the ASTM E346 standard method. These test methods are suitable for manufacturing control and for determining compliance with specification limits for the properties. The values reported are in SI units and are considered standard.

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Scope:

ASTM E346 standard method defines the procedures for the analysis of methanol. These are physical and chemical tests for determining the quality of methanol. The test methods appear in the following sections:

Test Methods	Sections
Purity of Reagents	4
Safety Precautions	5
Sampling	6
Acidity	7 to 9
Carbonizables	10 to 18
Colour	19 to 21
Distillation Range	22 to 24
Permanganate Time	25 to 27
Specific Gravity	28 to 30
Water	31 to 33
Water Miscibility	34 to 37
Ethanol	37 to 47
Acetone	48 to 55
Trimethylamine	56 to 65

Video 01: Testing the purity of methanol

Results:

Water-insoluble materials present in a solvent expected to be completely water miscible may interfere with many uses of the solvent. The water miscibility test method described in ASTM E346 provides a qualitative indication of the presence or absence of water-immiscible contaminants. Methanol is miscible (completely mixes) with water. The methanol sample is diluted to 10 volumes with water and the resulting mixture is examined for cloudiness and turbidity.

Sample (after 30 mins)	Result
Free of cloudiness or turbidity	Pass
Cloudiness or turbidity	Fail

Conclusion:

ASTM E346 standard method defines the procedures for the analysis of methanol.

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ASTM E346 Analysis of Methanol

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