ASTM D4764-01
(Test Method)Standard Test Method for Determination by X-ray Fluorescence Spectroscopy of Titanium Dioxide Content in Paint
Standard Test Method for Determination by X-ray Fluorescence Spectroscopy of Titanium Dioxide Content in Paint
SCOPE
1.1 This test method covers the determination of titanium dioxide content in liquid paint. This test method is applicable to both water-reducible and solvent-reducible paints.
1.2 The values stated in SI units ae to be regarded as the standard. The values given in parentheses are for information only.
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 limitations prior to use. Specific hazards statements are given in Section 7.
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Designation:D4764–01
Standard Test Method for
Determination by X-ray Fluorescence Spectroscopy of
1
Titanium Dioxide Content in Paint
This standard is issued under the fixed designation D 4764; 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 niumbromidein2-ethoxyethanolisaddedtothestandardpaint
and to each paint being analyzed. Drawdown films of the
1.1 This test method covers the determination of titanium
standard and test paint are made on thin plastic sheets. The
dioxide content in liquid paint. This test method is applicable
intensities of key X-ray fluorescence peaks of titanium and
to both water-reducible and solvent-reducible paints.
bromine are measured. The titanium dioxide content is deter-
1.2 The values stated in SI units ae to be regarded as the
mined by comparing the ratio of the intensities of titanium and
standard. The values given in parentheses are for information
bromine peaks in the test paint and the standard. Differences in
only.
the nonvolatile content of the paints are taken into account in
1.3 This standard does not purport to address all of the
the calculation of results.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety and health practices and determine the applica-
4.1 Titanium dioxide pigments are components with high
bility of regulatory limitations prior to use. Specific hazards
refractive index that significantly influence the opacity, color,
statements are given in Section 7.
durability, and other properties of coatings. This test method
2. Referenced Documents for determining titanium dioxide content is quicker and easier
to use than Test Methods D 1394, a wet chemical analysis
2.1 ASTM Standards:
2
method for pigments. It is conveniently applicable to single
D 1193 Specifications for Reagent Water
samples and to large numbers of samples. Only a single
D 1394 Test Methods for Chemical Analysis of White
3
relatively stable reagent used to prepare standards and paints
Titanium Pigments
4
under test need be stored. Drawdown specimens used as
D 2369 Test Method for Volatile Content of Coatings
standards, once prepared, can be stored indefinitely and used
D 3925 Practice for Sampling Liquid Paints and Related
4 repeatedly.
Pigmented Coatings
D 3980 Practice for Interlaboratory Testing of Paint and
5. Apparatus
5
Related Materials
5.1 X-ray Fluorescence Spectrometer, suitable for measure-
E 180 Practice for Determining the Precision Data of
ment of the baseline corrected intensity of the Ka lines of
ASTM Methods for Analysis and Testing of Industrial
6 titanium and of bromine. For spectrometers equipped with a
Chemicals
tungsten or chromium target and a lithium fluoride (200)
3. Summary of Test Method analyzing crystal, these lines are observed at 2u angles of
86.09° and 29.97°, respectively.
3.1 Paint containing a known amount of titanium dioxide is
used as the reference standard. A solution of tetraethylammo-
NOTE 1—Follow the recommendations of the manufacturer of the
instrument used. Use operating conditions that ensure that the count rate
for bromine and titanium are within the linear response range of the
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
detector. Although the base operating conditions and count rate may be
and Related Coatings, Materials, andApplications and is the direct responsibility of
different for different instruments, these differences will not affect the
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
outcome of the analysis.
Current edition approved Jan. 10, 2001. Published April 2001. Originally
e1
published as D 4764–88. Last previous edition D 4764–88 (1993) 5.2 Paint Shaker.
2
Annual Book of ASTM Standards, Vol 11.01.
5.3 Film Applicator, to produce a 75-µm (3-mil) wet film
3
Annual Book of ASTM Standards, Vol 06.03.
thickness.
4
Annual Book of ASTM Standards, Vol 06.01.
5
Discontinued 1998; see 1997 Annual Book of ASTM Standards, Vol 06.01.
6
Annual Book of ASTM Standards, Vol 15.05.
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D4764
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5.4 Plastic Sheet, with no interfering X-ray fluorescence tion manual, and other standard publications on the subject.
peaks and not attacked by paint solvent. Inquiries should be made of state agencies as to existing
5.5 Perforated Suction Plate, or other flat surface.
requirements.
5.6 Vials and caps,20mL.
8. Spe
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