The Influence of Electrostatic Repulsions on Micellar Diffusivities Obtained by Dynamic Light Scattering: Experiment vs Theory

Dynamic Light Scattering is a technique currently used to assess the particle size and size distribution by processing the scattered light intensity. Typically, the particles to be investigated are suspended in a liquid solvent. An analysis of the particular conditions required to perform a light scattering experiment on particles in air is presented in detail, together with a simple experimental setup and the data processing procedure. The results reveal that such an experiment is possible and using the setup and the procedure, both simplified to extreme, enables the design of an advanced sensor for particles and fumes that can output the average size of the particles in air.

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Using Dynamic Light Scattering for Monitoring the Size of the Suspended Particles in Wastewater

Transylvanian Review of Systematical and Ecological Research ◽

10.2478/trser-2019-0015 ◽

2019 ◽

Vol 21 (3) ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Dan Chicea ◽

Silviu Mihai Rei

Keyword(s):

Neural Network ◽

Light Scattering ◽

Dynamic Light Scattering ◽

Average Diameter ◽

Processing Plant ◽

Coherent Light ◽

Dominant Type ◽

Scattering Experiment ◽

The Subject ◽

Wastewater Samples

Abstract A coherent light scattering experiment on wastewater samples extracted from several stages of water processing within a wastewater processing plant was carried out. The samples were allowed to sediment while they were the subject of a Dynamic Light Scattering (DLS) measurement. The recorded time series were processed using an Artificial Neural Network based DLS procedure to produce the average diameter of the particles in suspension. The method, using a single physical procedure for monitoring the variation of the average diameter in time, indicates the dominant type of suspensions in water.

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Profiling Suspensions in Natural Water by a Simplified Dynamic Light Scattering Procedure and Sedimentation

Transylvanian Review of Systematical and Ecological Research ◽

10.1515/trser-2015-0059 ◽

2015 ◽

Vol 17 (2) ◽

pp. 1-10

Author(s):

Dan Chicea ◽

Liana-Maria Chicea

Keyword(s):

Light Scattering ◽

Dynamic Light Scattering ◽

Natural Water ◽

Average Diameter ◽

Least Square ◽

Coherent Light ◽

Time Intervals ◽

Dominant Type ◽

Scattering Experiment ◽

Water Suspensions

Abstract A coherent light scattering experiment was carried out. The samples were aqueous natural water suspensions picked from the same river. While sedimentation occurred in the samples, they were subjected to a dynamic light scattering (DLS) experiment and the time series was recorded at certain time intervals. For each recording, a program written for this purpose, performing at least square minimisation, computed the average diameter of the particles in suspension. The variation of the average diameter in time indicates the dominant type of suspensions in water.

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Dynamic Light Scattering Signal Conditioning for Data Processing

ACTA Universitatis Cibiniensis ◽

10.1515/aucts-2017-0016 ◽

2017 ◽

Vol 69 (1) ◽

pp. 130-135

Author(s):

Silviu Rei ◽

Dan Chicea ◽

Beriliu Ilie ◽

Sorin Olaru

Keyword(s):

Time Series ◽

Light Scattering ◽

Dynamic Light Scattering ◽

Data Processing ◽

Electrical Signal ◽

Signal Conditioning ◽

Scattering Experiment ◽

Logical Unit ◽

Scattering Signal ◽

Digital Time

Abstract When performing data acquisition for a Dynamic Light Scattering experiment, one of the most important aspect is the filtering and conditioning of the electrical signal. The signal is amplified first and then fed as input for the analog digital convertor. As a result a digital time series is obtained. The frequency spectrum is computed by the logical unit offering the basis for further Dynamic Light Scattering analysis methods. This paper presents a simple setup that can accomplish the signal conditioning and conversion to a digital time series.

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