A Novel Automatic Dilution System for On-Line Particle Size Analysis

Sacoto, P.; Lanza, Francesca; Suarez, Herrera; García‐Rubio, Luis H.

doi:10.1021/bk-1998-0693.ch003

Cited by 5 publications

(4 citation statements)

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“…Other methods exist for measuring parameters affected by particle size distribution, for example rheology based on a measurement of the consistency and flow of the food product [5]. Another approach is based on measuring the scattering of a water diluted sample [14]. However the water dilution can alter the particle composition of the food product.…”

Section: Related Workmentioning

confidence: 99%

Supercontinuum Light Sources for Hyperspectral Subsurface Laser Scattering

et al. 2011

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A materials structural and chemical composition influences its optical scattering properties. In this paper we investigate the use of subsurface laser scattering (SLS) for inferring structural and chemical information of food products. We have constructed a computer vision system based on a supercontinuum laser light source and an Acousto-Optic Tunable Filter (AOTF) to provide a collimated light source, which can be tuned to any wavelength in the range from 480 to 900 nm. We present the newly developed hyperspectral vision system together with a proof-of-principle study of its ability to discriminate between dairy products with either similar chemical or structural composition. The combined vision system is a new way for industrial food inspection allowing non-intrusive online process inspection of parameters that is hard with existing technology.

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Section: Related Workmentioning

confidence: 99%

Supercontinuum Light Sources for Hyperspectral Subsurface Laser Scattering

et al. 2011

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“…Also, they obtained better agreement in dispersions with bimodal distributions that do not have overlapping peaks. Other studies that discuss the application of turbidimetry and/or light scattering techniques to estimate the PSD were presented by Brandolin and Garcia‐Rubio283, 284 and Sacoto et al285…”

Section: On‐line Sensors For Polymer Property Trajectory Monitoringmentioning

confidence: 99%

A Critical Overview of Sensors for Monitoring Polymerizations

Fonseca

Dubé

Penlidis

2009

Macro Reaction Engineering

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The available on‐line and in‐line sensor technologies developed for polymerization reactors from 1990 until today are discussed and critically reviewed. About 600 references are included, which evidence the growth in sensor technology in the last two decades. Sensors for operational parameters in polymer reactors (i.e. temperature, pressure, level and flow) as well as sensors for polymer property monitoring (i.e. calorimetry, chromatography and spectroscopy, among others) are included. Complementary topics such as state estimation, multivariate statistical methods, fault diagnosis techniques and optimal sensor selection and location are briefly covered.

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“…Regarding to the submicron-range a frequently described solution is the use of an at line analysis, in which a sample is taken continuously and automatically diluted, prepared and fed to a light scattering analysis via an autosampler. The dilution step is essential to eliminate multiple scattering, to which dynamic light scattering reacts very sensitively [4][5][6]. Therefore, different particle sizing methods were compared in the nanometre range with regard to their suitability for mapping polydisperse as well as multimodal distributions of polymer latices.…”

Section: Introductionmentioning

confidence: 99%

Determination of inline-particle sizes by turbidity measurement in high solid content emulsion polymerisations

Rust

Pauer

2022

J Polym Res

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Particle size determination in optically dense systems requires costly techniques or dilution of collected samples. Against this background, turbidimetry was investigated as a potentially robust as well as inexpensive alternative. Emulsion copolymerisations of vinyl acetate and VeoVa10® with solid contents up to 48 wt% were examined time resolved with respect to mean particle size at different temperatures, solid contents and with different co-monomer ratios and emulsifier concentrations. The mean hydrodynamic diameters were validated by dynamic light scattering (DLS). Precise number mean hydrodynamic diameters in the range from 100 to 250 nm were obtained in-line for polyvinyl acetate dispersions with deviations in particle sizes below ± 5%. In addition, the turbidity values were recorded by means of a nephelometry process probe and thus a robust, system-related calibration was created, which was subsequently able to reliably track the number mean hydrodynamic diameter inline time-resolved.

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A Novel Automatic Dilution System for On-Line Particle Size Analysis

Cited by 5 publications

References 0 publications

Supercontinuum Light Sources for Hyperspectral Subsurface Laser Scattering

Supercontinuum Light Sources for Hyperspectral Subsurface Laser Scattering

A Critical Overview of Sensors for Monitoring Polymerizations

Determination of inline-particle sizes by turbidity measurement in high solid content emulsion polymerisations

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