Particle size analysis

Barth, Howard G.; Sun, Shao Tang.

doi:10.1021/ac00012a001

Cited by 23 publications

(3 citation statements)

References 10 publications

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“…Primary measurements are direct, as carried out by microscopy while secondary measurement are derived from the effects of some well studied physical phenomenon like settling, diffraction, or permeatry 13 . As a result, against the plethora of measurement techniques, there exists a different figure of particle sizes such as martin, feret, surface, stokes, sieve diameters, etc.…”

Section: Role Of Particle Size Measurementmentioning

confidence: 99%

Size and Shape of Ammonium Perchlorate and their Influence on Properties of Composite Propellant

Jain¹,

Mehilal²,

Nandagopal³

et al. 2009

DSJ

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Section: Role Of Particle Size Measurementmentioning

confidence: 99%

Size and Shape of Ammonium Perchlorate and their Influence on Properties of Composite Propellant

Jain¹,

Mehilal²,

Nandagopal³

et al. 2009

DSJ

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“…Capa-700 is based on a liquidphase dispersive sedimentation method (gravity and centrifugal force) whereby measurements are made by means of an optical transmission method at 560 nm (photosedimentometry). The validity of the method has been evaluated recently (6), and the data obtained here with the Capa-700 were checked using calibrated microparticles in the size range 0.2-100 ~tm (polystyrene size standard kit; Polysciences, Warrington, PA). The mean discrepancy between the expected and measured median diameters of the microparticles was _+10.3%.…”

Section: Methodsmentioning

confidence: 99%

Lipolysis and heterogeneous catalysis. A new concept for expressing the substrate concentration

Bernard¹,

Buc²,

Piéroni³

1996

Lipids

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A new concept is proposed for quantifying the substrate concentration during heterogeneous catalysis of the kind which occurs during lipolysis. The number of molecules of protein (enzyme) adsorbable to the lipid substrate interface per unit of volume was evaluated and defined as a volumetric concentration of protein (enzyme) binding site (PEBS). Using porcine pancreatic lipase (EC 3.1.1.3) as a model enzyme, the maximal PEBS concentration was measured under various assay conditions by determining the saturation of the lipid substrate with the enzyme. Abacuses correlating the lipid substrate concentration (M) with the PEBS concentration (M) under each experimental conditions were used to express the kinetic data in terms of a volumetric concentration of PEBS. Comparisons could thus be made between data obtained with various enzymes and lipid interfaces because they were expressed with the same unit. In the case of pancreatic lipase, using triolein and tributyrylglycerol as substrates, Km values of 2.7 and 7.5 nM PEBS were obtained, respectively, and KD values ranging around 9 nM PEBS were also obtained from Scatchard plots. In addition, the average superficial density of PEBS was found to be 10 x 10(11) molecules.cm-2, which is a value commonly obtained with structural proteins and enzymes adsorbed to an acylglyceride-water interface, this finding supports the idea that the PEBS concept represents the room in which the protein molecule adsorbs at the lipidic interface.

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“…Numerous techniques have been developed for, or applied to, determining particle size distributions, methods such as microscopy, sedimentation, high‐resolution mass spectrometry, dynamic light scattering, analytical ultracentrifugation, size‐exclusion chromatography, field‐flow fractionation, and gel electrophoresis 15–20. Most of these techniques either involve chromatographic or mechanical means for separating particles, prior to detection, into essentially monodisperse aliquots.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic chromatography of latex blends

Brewer¹,

Striegel²

2010

J of Separation Science

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The ability to characterize the size and shape distributions of broadly polydisperse analytes is a driving force in particle size analysis. Multi-detector hydrodynamic chromatography (HDC), which has previously shown promise in its ability to characterize the size and shape of monodisperse, spherical polystyrene latex standards, is applied here to include the characterization of bi-, tri-, and tetramodal latex blends and their constituents varying in size, chemistry, and compactness. The ability of multi-detector HDC to distinguish between similar-sized particles of different chemistry is realized by the coupling of a concentration-sensitive detector and two different types of light scattering detectors. The use of both multi-angle static and quasi-elastic light scattering permits for determination of two different size parameters across the elution profiles of the blends. Combining the size information obtained from both light scattering methods provides a measure of how particle compactness changes as a function of size in a latex blend. Multi-detector HDC was shown to be a rapid and precise method for characterizing particle size, shape, and their distributions of broadly polydisperse analytes.

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Particle size analysis

Cited by 23 publications

References 10 publications

Size and Shape of Ammonium Perchlorate and their Influence on Properties of Composite Propellant

Size and Shape of Ammonium Perchlorate and their Influence on Properties of Composite Propellant

Lipolysis and heterogeneous catalysis. A new concept for expressing the substrate concentration

Hydrodynamic chromatography of latex blends

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