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IP 646: Determination of the concentration of dispersed particles in marine methanol fuel — Automatic Particle Counter (APC) Light Obscuration Method

  • Published: September 2025

Overview:

This standard describes a method for determining the level of dispersed particles in marine methanol fuel in the range from 4 μm(C) to 30 μm(C), up to a maximum of 60 000 cumulative counts per ml.

NOTE 1: The projected area of a particle is measured, this is expressed as a diameter for the purposes of this method.

NOTE 2: The subscript (C) is used to denote that the particle size has been measured using an
instrument calibrated in accordance with and traceable to ISO 11171.

WARNING — The use of this Standard can involve hazardous materials, operations and equipment. This Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of users of this standard to take appropriate measures to ensure the safety and health of personnel prior to application of the standard, and fulfil statutory and regulatory requirements for this purpose.

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