Pore Size Measurement of Battery Separators
Pore Size Measurement of Battery Separators A typical battery consists of two electrodes, a cathode (+) and an anode (-), and an electrolyte. The electrodes are electrical conductors that contact with the electrolyte allowing for the circulation of charge. One of the key parts in a battery is the separator. It is a porous membrane […]
Replacing Eye Test Dispersion Stability Analysis with the Turbiscan
Replacing Eye Test Dispersion Stability Analysis with the Turbiscan Colloids and dispersions are inherently unstable systems which can be considered as kinetically stable if the destabilization is enough small compared with the expected lifespan. The analysis of the dispersion instability is of prime importance. Rudimentary techniques, such as the eye test, are currently being used […]
Nanoparticle Distribution Analysis: DLS or ELS?
Learn how to perform full particulate characterization, including nanoparticle distribution, using both DLS and ELS.
Outlining Zeta Potential Measurements
Outlining Zeta Potential Measurements Zeta potential measurements are a common protocol when analyzing colloidal systems (beverages, food, inks, paints, pharmaceuticals, etc.). It is a complex parameter that defines the electro-kinetic potential of heterogeneous liquids, typically formulations comprising microscopic/nanoscale insoluble particles dispersed in a mobile phase. The sheer breadth of that definition indicates how complex zeta […]
Quality of Particle Sample Measurement
Quality of Particle Sample Measurement Quality in a particle characterization measurement can be defined using the term “accuracy”, which is composed of both bias and precision. Bias is a measure of how the measured value compares with the “true” value or commonly accepted value. This true value may be established through other (certified) reference measurement […]
Formulation Analysis: 4 Factors Affecting Stability
Formulation Analysis: 4 Factors Affecting Stability A formulation is loosely defined as the structured mix of ingredients in a finished product. Typical components include a continuous phase, a dispersed phase, stabilizing agents, and various additives which combine to perform a virtually limitless range of functions. However, the sheer versatility offered by formulation engineering is also […]
The Basic Statistical Numbers in Particle-Size Distribution Analysis
The Basic Statistical Numbers in Particle-Size Distribution Analysis Mean:The mean is an average over the entire distribution. There are different types of means that can be calculated from the same set of data. (See the next blog for more details of various means.) Median: The median is the value that divides the population into two […]
What is Electrical Sensing Zone Method (ESZ)?
What is Electrical Sensing Zone Method (ESZ)? It is a widely accepted technology in the field of medical technology that presently over 98% of automated cell counters incorporate the ESZ. This method can be used to count and size any particulate material that can be suspended in an electrolyte solution. In an ESZ experiment, a […]
How Dynamic Light Scattering (DLS) Works
How Dynamic Light Scattering (DLS) Works In dynamic light scattering, the speed at which the particles are diffusing due to Brownian motion is measured. This is done by measuring the rate at which the intensity of the scattered light fluctuates when detected using a suitable optical arrangement. How do these fluctuations in the intensity of […]
Characterization Of Pore Size Distribution Of Track-Etched Membranes
Characterization Of Pore Size Distribution Of Track-Etched Membranes BACKGROUND: Track-etched membranes are thin polymeric materials with a well-defined pore structure created by either irradiation with particles or ions of known size/or by chemical etching. These processes permit careful control of membrane pore size and density. Track-etched membranes are considered to have cylindrical pores (with diameters […]