ASTM D3271-87(2001)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3271–87 (Reapproved 2001)
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.
1. Scope 5. Apparatus
1.1 This practice describes the techniques used to inject 5.1 Gas Chromatograph—Anyinstrumentwithtemperature
whole paint samples directly into a gas chromatograph to programming capability may be used. It should be equipped
obtain a chromatogram from which the solvent composition with either a thermal conductivity or flame ionization detector
2 ,3
may be established. (see Practice E 260).
1.2 This practice is not designed to be quantitative. 5.2 Recorder—A 1 to 10-mV recorder with a full-scale
1.3 This standard does not purport to address all of the response time of2sor less and a maximum noise of 60.03 %
safety concerns, if any, associated with its use. It is the of full scale.
responsibility of the user of this standard to establish appro- 5.3 Column—The resolution of the column must be such
priate safety and health practices and determine the applica- that under the operating conditions selected the distance from
bility of regulatory limitations prior to use. A specific hazard the base line to the depression between two adjacent peaks
statement is given in 6.1. must be not more than 50 % of the smaller peak. Columns may
be either packed or capillary.
2. Referenced Documents
6. Reagents and Materials
2.1 ASTM Standards:
E 260 Practice for Packed Column Gas Chromatography 6.1 Carrier Gas—Helium or hydrogen for use with thermal
conductivity detector units; and nitrogen, helium or argon for
3. Summary of Practice
use with flame ionization detector units.
3.1 Asuitablealiquotofwholepaintisinjected,bymeansof 6.1.1 Warning:When hydrogen is used, special precautions
a syringe, into a gas chromatographic column in order to should be taken to prevent gas leakage from causing a possible
separate the solvents.
explosion.
6.2 Column Packing Material, meeting requirements in 5.3.
4. Significance and Use
The following materials have been used satisfactorily:
4.1 Gas chromatographic separation of solvents present in
6.2.1 Polyethylene glycol, molecular weight 20 000, and
whole paints is the preferred first step for identifying and
diisodecyl phthalate as liquid phases on a solid support of 60 to
quantitating solvent compositions, using auxiliary procedures
80 mesh (250 to 175 µm) diatomaceous earth.
and techniques.
6.2.2 Porous beads of ethylvinylbenzene and divinylben-
zenecopolymer,60to80-mesh(250to177-µm)havealsobeen
successfully used as column material.
6.3 Liquid Charging Devices, such as micro syringes. Dis-
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
posable type is preferred.
Related Coatings, Materials, and Applications and is the direct responsibility of
6.4 Septum Sample Vi
...