About this Materials Science article

Data Accuracy and Resolution in Particle Sizing by Dynamic Light Scattering by Horst Ruf is a Materials Science article available to read on EtoBox.

The noise levels and the decay characteristics in experimental data from dynamic light scattering measurements determine the number of details of continuous size distributions that can be resolved. Here, a procedure is described that allows one to obtain resolution limits empirically from experimental data on hand. This is done by comparing differences of autocorrelation functions associated with size distributions of different complexity with noise in the experimental data. Size distributions of rather different complexity but related to autocorrelation functions that describe the experimental data nearly equally well are obtained from series of regularized inversions carried out by the size distribution algorithm CONTIN. The procedure is demonstrated with two data sets of different noise content. It is shown that a monomodal size distribution with a relative width (standard deviation/average radius) of about 0.2 can be determined with a high accuracy, when the residuals in data of the first order autocorrelation function are of the order of 10-d. A bimodal size distribution with narrow peaks of relative widths of about 0.05 and a size ratio of about 3:2, the autocorrelation funct

Author

Horst Ruf

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0001-8686)

Published

1993

Language

EN

Field

Materials Science (Physical Sciences)