ASTM D2269-99e1
(Test Method)Standard Test Method for Evaluation of White Mineral Oils by Ultraviolet Absorption
Standard Test Method for Evaluation of White Mineral Oils by Ultraviolet Absorption
SCOPE
1.1 This test method describes a procedure for the examination and evaluation of NF and USP grade white mineral oils.
1.2 This test method is not applicable to oils containing additives soluble in dimethyl sulfoxide (DMSO) that exhibit fluorescence or fluorescence quenching properties.
1.3 The values in SI units are regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see .
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An American National Standard
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Designation:D2269–99
Standard Test Method for
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Evaluation of White Mineral Oils by Ultraviolet Absorption
This standard is issued under the fixed designation D 2269; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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e NOTE—Editorial changes were made to 1.3, 7.1.2, 7.4,and 7.5 in January 2005.
1. Scope 3. Terminology
1.1 This test method describes a procedure for the exami- 3.1 Definitions:
nation and evaluation of NF and USPgrade white mineral oils. 3.1.1 For definitions of terms and symbols relating to
1.2 This test method is not applicable to oils containing absorption spectroscopy see Terminology E 131. Terms of
additives soluble in dimethyl sulfoxide (DMSO) that exhibit particular significance are the following:
fluorescence or fluorescence quenching properties. 3.1.2 radiant energy, n—energy transmitted as electromag-
1.3 The values in SI units are regarded as the standard. The netic waves.
values given in parentheses are for information only. 3.1.3 radiant power, P, n—the rate at which energy is
1.4 This standard does not purport to address all of the transported in a beam of radiant energy.
safety concerns, if any, associated with its use. It is the 3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro- 3.2.1 absorbance, A, n—the logarithm to the base 10 of the
priate safety and health practices and determine the applica- reciprocal of the transmittance, T. In symbols:
bility of regulatory limitations prior to use. For specific
A 5 log ~1/T!52log T (1)
10 10
precautionary statements, see 7.1.1-7.1.3.
where T is the transmittance as defined in 3.2.5.
3.2.2 absorptivity, a, n—the absorbance divided by the
2. Referenced Documents
2 product of sample pathlength and concentration. In symbols:
2.1 ASTM Standards:
a 5 A/bc (2)
D 1840 Test Method for Naphthalene Hydrocarbons in
Aviation Turbine Fuels by Ultraviolet Spectrophotometry
E 131 Terminology Relating to Molecular Spectroscopy
whereAistheabsorbanceasdefinedin3.2.1,bisthesample
E 275 Practice for Describing and Measuring Performance pathlength as defined in 3.2.4, and c is the concentration as
of Ultraviolet, Visible, and Near Infrared Spectrophotom-
defined in 3.2.3.
eters 3.2.3 concentration, c, n—the quantity of sample expressed
2.2 Other Standard:
in grams per litre.
U.S. Pharmacopeia USP XIII/National Formulary (NF 3.2.4 sample pathlength, b, n—the distance in centimetres,
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XVIII)
measuredinthedirectionofpropagationofthebeamofradiant
energy, between the surfaces of the specimen on which the
radiant energy is incident and the surface of the specimen from
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This test method is under the jurisdiction of ASTM Committee D02 on which it is emergent.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
3.2.5 transmittance, T, n—the ratio of the radiant power
D02.04 on Hydrocarbon Analysis.
transmitted by the mineral oil extract in its cell to the radiant
Current edition approved Nov. 10, 1999. Published December 1999. Originally
power transmitted by the solvent control in its cell. Expressed
published as D 2269 – 64 T. Last previous edition D 2269 – 93.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
by,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
T 5 P /P (3)
Standards volume information, refer to the standard’s Document Summary page on e c
the ASTM website.
where P is the radiant power transmitted by the mineral oil
3 e
r 1996–1998 The United States Pharmacopeial Convention, Inc., 12601
extract and P is the radiant power transmitted by the solvent
c
Twinbrook Parkway, Rockville, MD 20852. Library of Congress Catalog Card
Number 83-640088. control.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2269–99
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charcoal. Thecolumnis25mmindiameter,drawnto6.4mmindiameter
4. Summary of Test Method
at the bottom and has a reservoir at the top for containing the liquid. Glass
4.1 Asample of oil is extracted with dimethyl sulfoxide and
wool is placed in the bottom of the column, and about 13 mm of 0.707 to
the ultraviolet absorbance of the extract is determined in the
0.074 (25 to 200 mesh) or 0.0149 to 0.074 (100 to 200 mesh) silica gel is
range from 260 to 350 nm. The absorbance is compared with
placed on top of it. The column is filled with activated charcoal and the
that of a naphthalene standard. spectroscopic solvent poured into the reservoir and allo
...
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