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SurPASS 3 & ISO 13100 Compliance
In March 2024, the new ISO standard titled ‘Methods for zeta potential determination – Streaming potential and streaming current methods for porous materials’ was published. This standard describes the method of streaming potential measurement. The latter forms the basis of Anton Paar’s measuring instrument SurPASS 3.
The standard specifies methods for the zeta potential determination in porous materials that are saturated with a liquid where the pores are readily accessible. There is no restriction on the value of the zeta potential, nor on the porosity of the porous material. A pore is assumed to be on the scale of hundreds of micrometres, or smaller, without any restriction on pore geometry.
The document covers the applications of alternating current (AC) and direct current (DC) methods using aqueous media such as wetting liquids. This effectively makes the SurPASS 3 the standard to measure zeta potential in porous materials.
SurPASS 3
The SurPASS 3 features fully automated zeta potential analysis of macroscopic solids under real-life conditions. As an electrokinetic analyser, it employs the classic streaming potential and streaming current method for a direct analysis of the surface zeta potential. The zeta potential is related to the surface charge at a solid/liquid interface, and is a key parameter for understanding surface properties and developing new specialised materials.
What SurPASS 3 brings to the table: • More than 15 elaborate measuring cells that accommodate samples of various geometries, ranging from powders and fibres to planar solids • Liquid-on-solid surface adsorption kinetics can also be followed in real-time on model surfaces and on your actual sample • Automated pH scan and detection of the isoelectric point
More information online:
ilmt.co/PL/JRb1 62531pr@reply-direct.com
NEW: Anton Paar’s New Particle Size Analyser
Anton Paar welcomes a new, even more capable way to characterise particles. The Litesizer DLS 700, our new, high-end particle size analyser, determines particle concentration precisely and faultlessly. By using multi-angle particle sizing (MAPS), it achieves the highest resolution for different peaks, making it our most capable particle sizing instrument to date.
All of the features you’ve come to enjoy from the Litesizer DLS 500 instrument are also part of the DLS 700. Such features include, besides others, the characterisation of nanoparticles and microparticles at three measurement angles, including automatic angle selection. The measurement of zeta potential with our patented cmPALS technology, in combination with the unique Omega shaped cuvettes, allows for faster, more precise measurements and higher repeatability (+/- 3%) compared to conventionally-used methods. Additionally, the DLS 700 and 500 also offer the measurement of molecular mass, continuous transmittance measurements and determination of the refractive index of solvents.
AP Connect
Users can manage all of these features with Kalliope, the user-friendly and intuitive measurement software of Litesizer DLS 700. The software also includes the brand-new play list feature that allows users predefine a series of measurements consisting of different measurement modes with minimum user interaction, as well as tailored reporting options combining results from different measuring modes within one report.
Enjoy all the benefits from Kalliope software, where one-page workflows, measurement overviews and three-click results maximise efficiency and save time and resources.
More information online:
ilmt.co/PL/d7xJ
Vendor-independent digitization of laboratory instrument data Complete integration of all connected instruments Seamless initiation of measurements and generation of sample lists Compliance with key industry regulations like 21 CFR Part 11 and EU Annex 11
62532pr@reply-direct.com Laboratory Execution Software
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