Standardless method for quantitative particle-size distribution studies by gravitational field-flow fractionation. Application to silica particles |
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Authors: | P Reschiglian D Melucci G Torsi A Zattoni |
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Institution: | (1) Department of Chemistry “G. Ciamician”, University of Bologna, V. Selmi 2, 40 126 Bologna, Italy;(2) Department of Chemistry, University of Ferrara, V. L. Borsari 46, 44100 Ferrara, Italy |
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Abstract: | Summary Gravitational field-flow fractionation is a separative analytical technique which has already proved suitable for quantitative
particle-size distribution analysis. One of the most attractive aspects of the technique is that it can allow for direct conversion
of fractograms into size distributions of the samples, although retention exhibits substantial dependence on flow rate, compared
to other field-flow fractionation methods.
It is shown here that conversion of fractograms into quantitative, size-distribution profiles of micron-sized silica particles
is possible through gravitational field-flow fractionation in standardless mode. Standardless means that the conversion of
fractograms is performed by single-run analysis because all the parameters necessary for the calculations can be obtained,
from sample specifications and previous instrumental calibration, by means of semiempirical models.
Work partially presented at FFF’98-7th International Symposium on Field-Flow Fractionation, Salt Lake City, Utah (USA), February 8–11, 1998 |
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Keywords: | Particle-size distribution Gravitational field-flow fractionation Silica |
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