ASTM D7588-11
(Guide)Standard Guide for FT-IR Fingerprinting of a Non-Aqueous Liquid Paint as Supplied in the Manufacturer's Container
Standard Guide for FT-IR Fingerprinting of a Non-Aqueous Liquid Paint as Supplied in the Manufacturer's Container
SIGNIFICANCE AND USE
The ability to collect an infrared spectrum of a liquid paint as supplied in the container from the manufacturer is of significant importance when performing qualification testing. Historically, fingerprinting a material for such purpose involved separating the components of the paint and collecting an infrared spectrum of one or more of these components (vehicle, pigments, solvent, etc.) with Test Method D2621 being used for the identification of the vehicle. This unfortunately provides information only on the portion of the liquid paint analyzed whereas the technique shown in this practice provides a more complete picture of what is in the container provided. In addition, user expertise and time required to collect a spectrum is minimal versus traditional standards.
SCOPE
1.1 This guide covers the FT-IR fingerprinting of a liquid paint as supplied in the container without the need to separate components. Spectra collected using this technique have been found useful for paint manufacturers' quality control, trouble shooting and to verify that the paint being used is the same as the paint sample tested. This technique has been found useful for both single and multi-component coatings, the latter of which, where each component is analyzed separately (for example, amine cured epoxies and polyol/isocyanate urethanes).
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 requirements prior to use.
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Designation: D7588 − 11
Standard Guide for
FT-IR Fingerprinting of a Non-Aqueous Liquid Paint as
Supplied in the Manufacturer’s Container
This standard is issued under the fixed designation D7588; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This guide covers the FT-IR fingerprinting of a liquid 3.1 Definitions—For definitions of terms and symbols, refer
to terminology in Terminology E131.
paint as supplied in the container without the need to separate
components. Spectra collected using this technique have been
4. Summary of Guide
found useful for paint manufacturers’ quality control, trouble
shooting and to verify that the paint being used is the same as
4.1 Infrared spectra are collected using an FT-IR spectro-
the paint sample tested. This technique has been found useful
photometer fitted with an ATR crystal, multi or single bounce.
for both single and multi-component coatings, the latter of
Samples are taken directly from the paint container as supplied
which, where each component is analyzed separately (for
by the manufacturer.
example, amine cured epoxies and polyol/isocyanate ure-
thanes).
5. Significance and Use
1.2 The values stated in SI units are to be regarded as
5.1 The ability to collect an infrared spectrum of a liquid
standard. No other units of measurement are included in this
paint as supplied in the container from the manufacturer is of
standard.
significant importance when performing qualification testing.
Historically, fingerprinting a material for such purpose in-
1.3 This standard does not purport to address all of the
volved separating the components of the paint and collecting
safety concerns, if any, associated with its use. It is the
an infrared spectrum of one or more of these components
responsibility of the user of this standard to establish appro-
(vehicle, pigments, solvent, etc.) with Test Method D2621
priate safety and health practices and determine the applica-
being used for the identification of the vehicle. This unfortu-
bility of regulatory requirements prior to use.
nately provides information only on the portion of the liquid
paint analyzed whereas the technique shown in this practice
2. Referenced Documents
provides a more complete picture of what is in the container
2.1 ASTM Standards:
provided. In addition, user expertise and time required to
D2621 Test Method for Infrared Identification of Vehicle
collect a spectrum is minimal versus traditional standards.
Solids From Solvent-Reducible Paints
E131 Terminology Relating to Molecular Spectroscopy
6. Apparatus
E168 Practices for General Techniques of Infrared Quanti-
6.1 Spectrophotometer—An FT-IR spectrophotometer with
tative Analysis
-1
a wavelength range of at least 600 to 4000 cm and a
E204 Practices for Identification of Material by Infrared
-1
resolution no less than 4 cm .
Absorption Spectroscopy, Using the ASTM Coded Band
and Chemical Classification Index (Withdrawn 2014)
6.2 Multi or Single Bounce Horizontal Attenuated Total
Reflectance (ATR) Trough—For many paint samples, a 45
degree single bounce Fresnel-type ZnSe crystal has been found
1 to provide satisfactory results for most liquid paints. Paint
This guide is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
samples unsuitable for this setup will exhibit many 100 %
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
absorptions not to be confused with the 100 % absorptions
Current edition approved June 1, 2011. Published June 1, 2011. DOI: 10.1520/
associated with the spectral cutoff of the instrument optics and
D7588-11.
crystal material. It should be noted that ATR spectra are
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
influenced by the depth of penetration
...
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