Standard Guide for X-Ray Fluorescence (XRF) Spectroscopy of Pigments and Extenders

Importancia y uso:

5.1 The identification of pigments in a sample of liquid paint or paint film is often important for regulatory purposes. Many inorganic pigments or extenders utilized in past paint formulation are now regulated by federal, state, or municipal health authorities. XRF is one of the more common and convenient methods employed to characterize the pigment composition of a paint formulation.

5.2 XRF techniques, in general, do not provide the ability to identify the chemical nature of organic pigments. There are instances where XRF techniques, used in tandem with other analytical methods, such as solid state Carbon 13 Nuclear Magnetic Resonance (C-13 NMR), can identify the organic pigments utilized in coatings. However, XRF provides only an elemental sketch of the inorganic pigmentation. The chemical composition of the pigments is inferred by the analyst from the samples, color, elemental information, and common sense. Small impurities are often found in pigments, so the relative XRF intensities also serve to guide the analyst in proposing the probable pigment present.

Subcomité:

D01.21

Referida por:

D8584-24, A1095-15R23, E3234-20

Volúmen:

06.01

Número ICS:

87.060.10 (Pigments and extenders)

Palabras clave:

briquette; energy dispersive XRF; extender; inorganic drier; pigment; spectroscopy; wavelength dispersive XRF; X-ray fluorescence;