||Hydrocarbons Standard Rewritten to Include Automatic Refractometers
ASTM D 1218, Standard Test Method for Refractive Index and Refractive Dispersion
of Hydrocarbon Liquids (1999), uses a manual refractometer to
obtain data used to characterize pure hydrocarbons and their mixtures.
On Aug. 23, an ASTM task group revised D 1218 to include separate
procedures for automatic as well as manual refractometers. A task
group of European and North American instrument users and manufacturers
wrote the revision under the guidelines of the Hydrocarbon Analysis
Subcommittee in ASTM Committee D02 on Petroleum Products and Lubricants.
The rewritten D 1218 will include an expanded list of calibration
reference standards and expand allowable temperature measurement
and control devices, said task group chairman, Rey G. Montemayor,
Ph.D., who specializes in analytical chemistry relating to the
quality assurance of petrochemical products. The most current
precision statements for both manual and automatic refractometers
are included in the new version of the standard.
The new version of the standard will allow users to be in strict
compliance with the test method regardless of whether automatic
or manual instruments are used, said Montemayor, a senior chemist
with Imperial Oil Ltd., Ontario, Canada. This is particularly
important during quality audits whereby compliance to specified
test methods is closely examined.
Direct inquiries to Rey G. Montemayor, Ph.D., Products and Chemicals Division, Imperial Oil Ltd., Sarina,
Ontario, Canada. Committee D02 meets Dec. 2-7 in Miami Beach,
Fla. For meeting or membership details, contact Dave Bradley, manager, ASTM Technical Committee Operations (phone: 610/832-9681).
Copyright 2001, ASTM