Laboratory Products 51


How Freeze Drying in Food Processing is Enabling Greater Effi ciency and Superior Results


Freeze drying (lyophilisation) is the most widely used alternative to evaporative techniques in food processing. The process is based on ice crystal sublimation, allowing to achieve a high-quality product. The process consists in freezing the product and decreasing both pressure and temperature below the water triple point (0.01 °C and 6.1 10-3 bar). The resulting sublimation at negative temperatures limits both chemical reactions and product degradation. Pre-treatments in hypertonic solutions are often carried out to better preserve the structure on freezing and drying as well as to enhance the product appearance and rehydration.


Freeze drying is benefi cial for a wide range of products including fruit and vegetables, dairy, pet food, beverages, meat, fi sh and seafood as well as nutraceuticals (e.g. sport supplements probiotics).


Since freeze drying produces superior products, the range of potential users has grown exponentially to fulfi l the request of military units and special forces during space and naval missions or in remote bases, tourism, athletes for extreme sports and expeditions, organisations such as UNESCO in places that are hit by disasters or confl icts, international humanitarian movements.


Biopharma has expanded their facilities for food freeze drying, introducing services built on a QbD approach that aim to assist in achieving the best results to meet customer requirements in terms of shelf life, appearance and physico-chemical properties. An initial characterisation of the thermal behaviour of the pre-lyophilised product is essential in order to design a tailored drying cycle. Without it, the risk is to use a freeze drying process that dries the product, but not in an effi cient way, irreversibly affecting the quality. Technologies such as freeze drying microscopy (Lyostat), DTA & impedance analysis (Lyotherm) and differential scanning calorimetry (DSC) are typically used to fully understand the food thermal behaviour.


More information online: ilmt.co/PL/MpLx 51407pr@reply-direct.com


Personal Benchtop Evaporator for DMSO and DMF Samples


BioChromato Inc. reports on installation of over 1200 units of its Smart Evaporator C1 - a compact system that delivers rapid concentration or complete drying of samples in even high boiling solvents such as DMSO, DMF or water.


Designed to be easy to use - the Smart Evaporator C1 is an affordably priced system optimised to concentrate or dry single samples directly from any tube or vial (up to 32mm neck diameter).


Drawing upon BioChromato’s patented spiral plug evaporation technology, the compact, benchtop Smart Evaporator C1 offers fast and effective evaporation in tubes or vials without solvent bumping thereby eliminating risk of sample loss, cross contamination and saving researchers time.


Proven to be the ideal lab tool for simple removal of high boiling point solvents, the C1 also excels at safe drying temperature sensitive compounds and effi cient evaporation of small volume samples.


The Smart Evaporator C1 is optimised to handle solvent volumes up to 40 mL which can be extremely useful for concentrating compounds after organic synthesis or drying analytical samples at relatively high speeds. The versatile C1 can also take small tubes and vials (e.g. 1.5mL) where solvent volumes can be as little as 0.1ml (or less).


More information online: ilmt.co/PL/z66k 53046pr@reply-direct.com


High-Quality Stills Added to Laboratory Technology Portfolio


Lauda has extended its laboratory technology product range with the Lauda Puridest stills product line. The devices with the ‘GFL Technology’ quality mark produce an ultra-pure, low-gas, sterile and pyrogen-free distillate with very low conductivity. Puridest stills are used in bacteriological and medical sample preparation and also in the preparation of cell and tissue cultures. They are also used for cleaning and sterilisation processes, buffer solutions and microbiological and analytical applications. The distillate complies with the DAB regulations and the specifi cations of international pharmacopoeias. Lauda Puridest stills also distil raw water of lower quality, separate pollutants, and reliably kill germs such as bacteria and viruses.


Lauda Puridest stills are available throughout the world in four high- performance product lines with 14 single- or two-stage model variants in the form of stainless steel or glass stills. Depending on the model, the devices are equipped with a storage tank and produce 2 to 12 litres of distillate per hour with conductivities down to below 1.6 µS/cm. Apart from their reliability and extremely long service life, Lauda Puridest stills are characterised by their simple handling in the daily work in the laboratory. The stills are extremely easy to commission and operate. The ultra-pure water can be extracted directly after connection to the raw water and power supply. The devices are maintenance-free, because the glass stills automatically remove pollutants.


Distillation is an effective and reliable way of producing pure water. The distinctive feature of distillation is that it only requires the input of energy. Compared with other auxiliary materials, such as absorbents or solvents, energy has the major advantage that it can be easily supplied to a system and removed again. As a result, stills require minimum maintenance. They are maintenance-free apart from regular cleaning. Distilled water, also referred to as aqua dest (lat. aqua destillata), is produced when steam condenses. This ‘pure water’ is approx. 99.5% free of salts, organic substances, microorganisms, pyrogens and bacteria.


More information online: ilmt.co/PL/PoWJ 52641pr@reply-direct.com


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