Method of determining titanium dioxide content in paint

Details Method of determining titanium dioxide content in paint Method of determining titanium dioxide content in paint

1990-10-01

1992-05-19

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Fluorescence

378 48, 378 88, 378 53, G01N 23223

Patent

active

051154579

ABSTRACT:
The amount by weight of TiO2 per gallon of paint in a paint sample is determined by X-ray fluorescence spectroscopy. The sample is prepared by weighing a portion of the sample while wet and then drying the sample. The dried sample is then calcined to produce an ash residue, which is weighed. The ash residue is then ground and heated to drive off any remaining moisture before being fused with a flux material into a glass bead. The amount of TiO2 in the fused glass bead is determined by an X-ray fluorescence instrument which has been previously calibrated with similar fused glass beads having known amounts of TiO2. The quantitative result of the X-ray fluorescence determination is then extrapolated back to determine the pounds of TiO2 per gallon of paint.

REFERENCES:
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patent: 5020084 (1991-05-01), Robertson
Andrews, C. R. and R. K. Mays, "Instrumental Techniques for the Analysis of Paper Fillers and Pigments", Adv. X-Ray Anal., vol. 22 (1979), pp. 207-212.
Kobayashi, Y. et al., "A Glass Bead Fluorescent X-Ray Method for Analysis of Samples Whose Main Component is Silicic Acid", Kagaku Gijutsu Kenkyusho Hokuku, vol. 78, No. 7 (1983), pp. 365-368.
Lewis, Peter A., ed., Pigment Handbook, Volume 1: Properties and Economics, 2nd ed., John Wiley & Sons, Inc.: New York, 1988, pp. 1-41.
"Designation: D 4563-86, Standard Test Method for Determination of Atomic Absorption Spectroscopy of Titanium Dioxide Content of Pigments Recovered from Whole Paint", 1986, pp. 1069-1073.

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