Improved Resolution and Accuracy in Electrical Sensing Zone particle counters through hydrodynamic focussing

Merkus, Henk G.; Houyuan, Liu; Scarlett, B.

doi:10.1002/ppsc.19900070103

Cited by 9 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This general model can be used to perform particle sizing measurement, in particular by optimizing shape design or fluidic conditions. For example, an optimal hydrodynamic focusing system improves accuracy and resolution of sizing measurements by electrical gating [14][15][16][17][18].…”

Section: Resultsmentioning

confidence: 99%

Numerical simulation of particle dynamics in an orifice–electrode system. Application to counting and sizing by impedance measurement

Isèbe

Nerin

2012

Numer Methods Biomed Eng

View full text Add to dashboard Cite

This paper describes how to numerically tackle the problem of counting and sizing particles by impedance measurement in an orifice-electrode system. The model allows to simulate the particle dynamics submitted to strong hydrodynamic stresses through a microorifice and to compute the voltage pulses generated by the modification of the inner dielectric medium. This approach gives important information about particles size distribution and allows to quantify the role of trajectory and orientation of particles on the size measurement.

show abstract

Section: Resultsmentioning

confidence: 99%

Numerical simulation of particle dynamics in an orifice–electrode system. Application to counting and sizing by impedance measurement

Isèbe

Nerin

2012

Numer Methods Biomed Eng

View full text Add to dashboard Cite

show abstract

“…1), on the other hand, it allows the active area of the device to be effectively confined to the size of the focalized stream, thus enhancing the device sensitivity (Eq. 2) (Spielman and Goren 1968;Merkus et al 1990). This last property is simply achieved by using fluids with much higher conductivity in the central flow than in the lateral flows.…”

Section: Electrical Characterizationmentioning

confidence: 99%

Low cost micro-Coulter counter with hydrodynamic focusing

Rodriguez-Trujíllo

Mills

Samitier

et al. 2006

Microfluid Nanofluid

View full text Add to dashboard Cite

We report on the fabrication and characterization of a low-cost micro-Coulter counter fabricated from biocompatible materials (Poly-dimethylsiloxane, glass and gold) and incorporating hydrodynamic focusing. The developed micro-Coulter counter offers a low-cost alternative to equivalent existing devices and, thanks to the hydrodynamic focusing, provides high versatility, being able to probe particles with a wide range of sizes within a single device. The device has been successfully tested for counting 20 latex micro beads in suspension.

show abstract

Electrozone Sensing in Particle Size Analysis

Figueiredo

2000

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

Particle sizing is a rapidly growing field, not only because of its importance in a great variety of technological applications but also due to its outstanding relevance to numerous areas of scientific research. The currently available instruments to measure particle‐size distributions are many and varied, the results often being dependent on the measuring technique used. It is thus essential to understand the physical principles behind each technique in order to make an adequate choice. Electrozone sensing, a widely used method of particle‐size analysis, constitutes the main topic of this paper. A general description of its operating principle is provided, followed by some practical considerations mainly concerning sample preparation and the selection of electrolyte solutions and aperture tubes. Being a technique that requires prior calibration, emphasis is placed on the calibration procedures. The section dedicated to the measurement of special materials also reviews some recent improvements of this technique. Finally, a list of commercially available equipment is supplied, together with its most relevant features.

show abstract

Improved Resolution and Accuracy in Electrical Sensing Zone particle counters through hydrodynamic focussing

Cited by 9 publications

References 8 publications

Numerical simulation of particle dynamics in an orifice–electrode system. Application to counting and sizing by impedance measurement

Numerical simulation of particle dynamics in an orifice–electrode system. Application to counting and sizing by impedance measurement

Low cost micro-Coulter counter with hydrodynamic focusing

Electrozone Sensing in Particle Size Analysis

Contact Info

Product

Resources

About