ASTM D3271-87(1993)e1

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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e1
Designation: D 3271 – 87 (Reapproved 1993)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Direct Injection of Solvent-Reducible Paints Into a Gas
Chromatograph for Solvent Analysis
This standard is issued under the fixed designation D 3271; 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.
e NOTE—Keywords were added editorially in April 1993.
1. Scope with either a thermal conductivity or flame ionization detector
(see Practice E 260).
1.1 This practice describes the techniques used to inject
5.2 Recorder—A 1 to 10-mV recorder with a full-scale
whole paint samples directly into a gas chromatograph to
response time of2sor less and a maximum noise of 60.03 %
obtain a chromatogram from which the solvent composition
2,3
of full scale.
may be established.
5.3 Column—The resolution of the column must be such
1.2 This practice is not designed to be quantitative.
that under the operating conditions selected the distance from
1.3 This standard does not purport to address all of the
the base line to the depression between two adjacent peaks
safety problems, if any, associated with its use. It is the
must be not more than 50 % of the smaller peak. Columns may
responsibility of the user of this standard to establish appro-
be either packed or capillary.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. A specific hazard
6. Reagents and Materials
statement is given in 6.1.
6.1 Carrier Gas—Helium or hydrogen for use with thermal
2. Referenced Documents conductivity detector units; and nitrogen, helium or argon for
use with flame ionization detector units.
2.1 ASTM Standards:
E 260 Practice for Packed Column Gas Chromatography
NOTE 1—Precaution: When hydrogen is used, special precautions
should be taken to prevent gas leakage from causing a possible explosion.
3. Summary of Practice
6.2 Column Packing Material, meeting requirements in 5.3.
3.1 A suitable aliquot of whole paint is injected, by means of
The following materials have been used satisfactorily:
a syringe, into a gas chromatographic column in order to
6.2.1 Polyethylene glycol, molecular weight 20 000, and
separate the solvents.
diisodecyl phthalate as liquid phases on a solid support of 60 to
80 mesh (250 to 175 μm) diatomaceous earth.
4. Significance and Use
6.2.2 Porous beads of ethylvinylbenzene and divinylben-
4.1 Gas chromatographic separation of solvents present in
zene copolymer, 60 to 80-mesh (250 to 177-μm) have also
whole paints is the preferred first step for identifying and
been successfully used as column material.
quantitating solvent compositions, using auxiliary procedures
6.3 Liquid Charging Devices, such as micro syringes.
and techniques.
Disposable type is preferred.
6.4 Septum Sample Vials, PTFE-fluorocarbon-faced.
5. Apparatus
5.1 Gas Chromatograph—Any instrument with temperature
7. Procedure
programming capability may be used. It should be equipped
7.1 Protect the injection port from the nonvolatile
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