Abstract
Sedimentation field-flow fractionation is presented as an alternative method for pigment particle size characterization for the purpose of industrial quality control. The technique is demonstrated for three pigments of variously broad particle size distributions having average particle diameters ranging from ca. 0.1 to 0.6 μm. The analysis times compared favourably with those of disc centrifugation, and the reproducibility of the shape and mean particle size distributions were sufficient to otbtain a reliable quality standard “fingerprint” with which samples of unknown quality could be compared.
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