Particle Size Distribution Analyses

Electrozone

Particle Size Distribution Analyses - Electrozone

Coulter Counter Technique

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Electric Sensing Zone is also referred to as the Coulter Technique or Coulter Counter. The instrument is a true high resolution, high speed particle counter and particle size distribution analyzer that covers a nominal span of about 1.0 um to 300um. Under special circumstances, the lower detection level can be reduced to about 0.4 um. Data is typically presented to our clients on a Frequency (Population) and Volume (Mass) basis vs. Size. Being a true particle counter, the instrument can also be used to determine the concentration of Particles/mL of Fluid vs. Size.

Particles suspended in a conductive fluid (aqueous or organic) are drawn through a precision sapphire aperture on either side of which are two platinum electrodes. A constant current is impressed upon the electrodes which results in a constant voltage across the aperture. Upon the passage of a particle through the aperture, a voltage pulse is generated due to the change in electrolyte resistance. The change is proportional to the volume of the particle. Therefore, the analytical method determines the envelope volume of a particle in three dimensions which is the instruments claim to fame. The signal is counted as one event (i.e. particle count) and simultaneously, the volume is directly determined. Also, data presented on the basis of Equivalent Spherical Diameter is enhanced because there are no optical theories of light involved in the measurement principle.

PTL uses the following Electric Sensing Zone instruments:

Micromeritics Elzone II & 80XY

Click here for a sample typical output

Click here to request a quote or for more information on Electrozone particle testing.

Industries Served

Abrasives Serving the abrasive industry over the last 2 decades, the most common testing performed for this field is particle size and shape analysis. The world of abrasives can encompass a host of varying...
Dietary Supplements Concurrent with the U.S. Food and Drug Administration’s final rule establishing regulations to require current good manufacturing practices (cGMPs) for dietary supplements, PTL can offer cGMP services...
Environmental Testing Services Particle size, particle concentration and other physical characterization analyses are critical to many environmental applications. Regulatory agencies in the environmental sphere demand strict compliance...
Medical Devices Advances in biomedical implant and device technology continue to present new challenges in the area of physical testing. Particle Size Distribution, Surface Area and Porosity measurement data are...
Pharmaceutical Testing Services Supporting drug development with pharmaceutical testing is some of the most exciting work we do. As a premier cGMP contract service laboratory, PTL partners with pharmaceutical scientists to identify...
Beauty / Cosmetics Testing PTL’s analytical staff has years of experience designing test methods and performing analysis for cosmetic, skin care, fragrance and personal hygiene samples. Whether your company needs a third...