Beckman Coulter, Inc. has introduced a new application note which
details the study of the isoelectric point of flat surfaces using the DelsaNano
zeta potential system. The procedure,
Determining the Isoelectric Point of a Flat
Surface Using the DelsaNano, published in Beckman Coulter's Information
Bulletin IB-15476A, enables the study of surface charge and changes in surface
charge that result from coating, chemistry and fouling.
The DelsaNano is the only system available today to employ
electrophoretic light scattering to assess surface charge. The light scattering approach offers several
advantages over other technologies, including the ability to analyse smaller
samples and precise isoelectric point determination.
"Since releasing the flat-surface cell of the DelsaNano, through
collaboration with our customers we have learned a tremendous amount about how
to best apply the powerful surface zeta potential measurement," said Edgar
Martinez, senior applications scientist and the procedure's lead author.
"Since demand for tools to
study surface zeta potential has increased rapidly, we decided to compile and
publish best practices so that users can obtain the utmost in reliability,
accuracy and precision for their applications."
The procedure can be used in research and development and
manufacturing quality control, in applications such as thin-film deposition,
biocompatible material development, wafer assembly and other fields in which
the character and interaction of surfaces is critical. IB-15476A details
experiment set-up, recommended reagents and sample types, example data and
maintenance guidelines and is available through Beckman Coulter Particle Characterization
representatives.
Beckman
Coulter Particle Characterization
Beckman Coulter Particle Characterization develops,
manufactures and markets products that are used to study, analyse and quantify
particles of any type. The group serves
customers as diverse as cell biologists and cement manufacturers. Serving particle customers since 1960, the
group specialises in the Coulter Principle, laser diffraction, dynamic light
scattering, zeta potential and BET analysis to understand all aspects of
particulate samples. For more information, visit
www.coultercounter.com.
About
Beckman Coulter
Beckman Coulter, Inc., based in California, USA, develops, manufactures and
markets products that simplify, automate and innovate complex biomedical tests.
More than 275,000 Beckman Coulter systems operate in laboratories around the
world, supplying critical information for improving patient health and reducing
the cost of care. Recurring revenue, consisting of consumable supplies
(including reagent test kits), service and operating-type lease payments,
represents about 80 percent of the company's 2010 revenue of $3.7 billion. For
more information, visit www.beckmancoulter.com.
Beckman Coulter, the stylized logo and COULTER COUNTER are trademarks
of Beckman Coulter, Inc. and are registered in the USPTO. DelsaNano is a
trademark of Beckman Coulter, Inc
.