Laboratory Products 29 New reagents for Karl Fischer titration


On many occasions it is essential to know the amount of water present in a sample. Water can influence the reactivity, stability, and shelf life, etc, of products. Karl Fischer titration, established in the early 20th century, remains the widely accepted method globally. This technique relies on the Bunsen reaction, featuring a rapid two-phase process correlating the consumed I2 with the sample’s water content.


The first KF reagents developed contained pyridine in their formulation, supposedly essential for the reaction, but later experiments showed that pyridine only acts as a buffer substance and could be replaced by other basic compounds capable of carrying out the same function. For this reason, the new Karl Fischer Aquagent®


imidazoles instead of pyridine, alternative bases with good buffering capacity that allow stable titration end points to be quickly obtained. The newly developed manufacturing and control method allows us to launch a new Aquagent® Scharlau’s new Aquagent®


with multiple advantages for the user. Leading manufacturers of Karl Fischer titration equipment, including Metrohm, Mettler-Toledo and Hanna, recommend Scharlau’s Aquagent® More information online: ilmt.co/PL/LoXD 62329pr@reply-direct.com Vacuum filtration systems and piston pumps


Streamline and elevate your laboratory’s filtration procedures with Wiggens vacuum filtration systems, engineered to enhance efficiency, speed, safety, and precision across a wide range of applications.


From suspended solids measurement to HPLC, gas chromatography, AA micro-analysis, mobile phase decontamination, and applications in the food and beverage industry and pharmaceuticals, filtration stands as a crucial step in chemical and life science research. Wiggens proudly presents an extensive line-up of filtration devices designed to simplify filtration processes, ensuring cost-effectiveness and straightforward solutions for researchers and laboratories alike.


At the heart of Wiggens’ offerings lies the V series vacuum pump, a piston-powered, oil-free pump combining electronic and mechanical innovation. Compact, lightweight, and maintenance-free, this pump prioritises user experience, offering a clean, safe, and user-friendly design that seamlessly integrates with any filtration system.


Explore Wiggens’ comprehensive range of vacuum filtration systems, including: All-in-one filtration systems; Filtration collocations; Multi-position filtration manifolds; Customisable filtration system assembly options; Oil-free piston vacuum pumps; Accessories for filtration systems.


Facing a high sample workload? Wiggens’ filtration solutions are designed to reduce your workload, saving valuable time, effort, and resources while optimising your laboratory processes and minimising waste. Experience the difference with Wiggens vacuum filtration systems today.


More information online: ilmt.co/PL/1AzE 62297pr@reply-direct.com ADVERTORIAL Minimising thermal stress in molecular distillation


Molecular distillation, also called high vacuum wiped film, thin film or short path distillation, is a well-known process to separate thermally sensitive material. Combined in a new unique construction with precise temperature control units, this allows high performance distillation for many different applications and products.


Short path and molecular distillation The main concept of short path distillation is to prevent breakdown or cracking by minimising residence time and thus thermal stress. This is achieved by letting the product pass through a heated tube where wipers distribute the material and create a thin film for enhanced evaporation. Additionally, thermal stress is reduced by lowering the boiling point of the product (i.e. by applying vacuum).


Molecular distillation is a special form of short path distillation where the pressure is reduced even further, typically to less than 1x10-2 mbar. Through this, the mean free path of any molecule leaving the evaporator is longer than the distance between evaporator and condenser. That way all back-pressure (like in a conventional distillation column) is eliminated. Now the boiling point is no longer dependent on the vapor pressure but only on the molecular weight.


Hybrid construction for versatile and efficient distillation


The SP 1000 CC from Pilodist GmbH is a turnkey system for laboratory use and small scale production. It is optimised to cover a wide range of applications, from high melting to high boiling points and can handle thermally sensitive material with full flexibility and completely continuous operation.


formulations achieve a more stable and robust Karl Fischer factor, faster stabilisation, a greater reaction speed and a more stable endpoint. reagents.


reagents contain


Energy-effi cient temperature control


Sustainable refrigerated circulators in all performance classes


For optimal results it is crucial to have precise control over vacuum and temperature. For this, the SP 1000 CC uses individual temperature control units for all heating and cooling circuits. The feed vessel, tempered with a Julabo heating circulator, can pre-heat product to tailor its viscosity for ideal flow. The evaporator is also operated with a Julabo heating circulator for optimal heat transfer with a high circulation speed while the condenser uses a Julabo refrigerated circulator to collect and cool down the distillate. In addition, the condensation trap for collecting the very light volatiles is cooled with an Julabo immersion cooler down to -90°C.


More information online: ilmt.co/PL/eNAj 62209pr@reply-direct.com


CORIO, DYNEO, and MAGIO – JULABO offers envi- ronmentally-friendly, energy-effi cient refrigerated circulators from 200 to 2500 W. These compact devices use natural refrigerants to protect the climate. With a cooling capacity starting at 800 W, we focus on energy- effi cient components that deliver impressive potential energy savings of up to 70%. This leads to a rapid amortization of the initial costs for many applications.


Discover all models www.julabo.com


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