Zeta Potential & Particle Size Analyzer For Measurements In: ZetaPALS: A Whole New Concept For measurements of low mobility, the unique, Brookhaven Instruments ZetaPALS is the answer. There is nothing else like it. With concepts developed at Bristol University and Brookhaven Instruments, the ZetaPALS determines zeta potential using Phase Analysis Light Scattering (PALS): a technique […]
Abstract Measurements of limestone in 100% seawater (1.15M ionic strength), 50% seawater, and 25% seawater were conducted on the Brookhaven Instruments NanoBrook ZetaPALS. Below is the procedure for preparing these samples as well as the measurement parameters used in their analyses. Introduction Zeta Potential is relatively easy to measure in cases of high charge and […]
Introduction GPC when coupled with Static Light Scattering (SLS) is a fairly modern and powerful technique for determining absolute molecular weight values without the need to rely on traditional column calibration. In GPC-SLS the signal intensity levels rather than elution times are evaluated quantitatively. In addition, unlike in polymer standard calibration, details of the accurate […]
Library Polyvinylpyrrolidone (PVP) a Molecular Weight Determination with the BI-MwA Polyvinylpyrrolidone (PVP) is a polar molecule and is used in a wide variety of applications. For example, since it simply passes through humans, it is a binder in pharmaceutical tablets. Because PVP binds to polar molecules quite well, it is also used as a paper […]
Polylactic Acid (Polylactide, PLA) Molecular Weight Determination with the BI-MwA Polylactic acid, (polylactide, PLA) polymers are being used in a wide range of biomedical, commercial, pharmaceutical and academic applications due to their biocompatibility and biodegradability. Applications include stents, sutures and a wide range of uses in food packaging and disposable tableware. However, the molecular weight […]
Introduction Stability of protein formulations is of critical importance for the rapidly emerging areas of protein therapeutics and vaccine production from recombinant antigens. Zeta potential is the surface charge density at the shear plane, is one of the parameters used in predicting the stability of these preparations. Zeta potential has also been used as an […]
Abstract The NanoBrook line of instruments for particle size and zeta potential analysis while a powerful and all-encompassing research aid used throughout the world can also be used for teaching purposes in many undergraduate and non-technical settings where the principles of dynamic light scattering and electrophoretic mobility are important. Introduction Many times throughout the year, […]
Nomenclature The term solvent refers the pure solvent used to prepare the diluent. Examples of solvents are toluene or water. The diluent may also be referred to as the liquid in DLS textbooks. Diluents are solvent with additives, for example a 10% by weight methanol in water or a 10 mM KNO3 salt in DI […]
New and exciting applications are tantalizing goals for many researchers and, with uses ranging from new sensitive pregnancy testing kits to military camouflage, polymer chemistry has an intriguing future. The Sussex Polymer Group is based in the School of Chemistry, Physics and Environmental Science at the University of Sussex. It has two full-time faculty members […]
Written by: Douglas Mankiewicz, Bruce B. Weiner Ph.D., Yuanming Zhang Ph.D., and Jean-Luc Brousseau Ph.D. Abstract: Brookhaven Instruments was supplied two protein samples by Northeastern University. The protein size was measured using Brookhaven’s NanoBrook Omni instrument. The proteins were measured individually and then the samples were combined in to one mixture to determine if protein […]