CHROMATOGRAPHY
MEETING THE NEEDS OF CHROMATOGRAPHY LABS Porvair Sciences has launched its new generation Ultravap Levante nitrogen blowdown sample evaporator. T e second-generation system off ers the benefi ts associated with Porvair’s fl agship evaporator, the Ultravap Mistral, in an aff ordable, easy-to-use package. T is single microplate evaporator is designed to meet the current needs of most chromatography laboratories whilst providing the future option of fully automating sample dry- down in applications such as LC/MS analysis, dry recovery or reconstitution. T e compact, standalone Ultravap
Levante is fully programmable and easy to control from a robot liquid handler. Its advanced head technology enables delivery of evaporation temperatures up to 80°C for faster solvent evaporation rates. If required, the system has the option to be fi tted with ducted fan fume extraction. Operated via an intuitive graphical colour LED touchscreen, software features includes up to fi ve stored alphanumerically named programmes and multi-step evaporation programmes. T is functionality combined with real-time run displays showing actual gas temperature, gas fl ow rate and stage height means the system puts the user in full control of the evaporation process. A removable acrylic splash guard safeguards the operator
Testa Analytical’s versatile system
which is available due to the combination of diff erent detectors that would not be obtainable using the individual detectors separately. With the new HK Series Multi-
Detector GPC/SEC System, users can choose from a wide combination of detectors including diff erential refractive index (DRI), multiple angle light scattering (MALS), viscometry, ultraviolet (UV) and fl ow measurement. T is versatile system can be used to analyse a wide range of polymers, regardless of molecular weight range or solvent. T e combination of these diff erent sensitive detectors can deliver accurate, absolute molecular weight, size and distribution information as well as useful data to derive fundamental parameters such as radius of gyration, concentration, intrinsic viscosity, specifi c refractive index increment (dn/dc) and second virial coeffi cient.
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and also ensures effi cient removal of the solvent vapour from the evaporation table.
A VERSATILE SOLUTION T e new HK Series Multi Detector GPC/SEC system from Testa
Analytical Solutions combines high- performance chromatographic detector technologies and powerful yet easy to use software to unlock the secrets of even the most complex synthetic polymers and natural macromolecules.
Gel permeation chromatography/ size exclusion chromatography (GPC/ SEC) is widely accepted as the analytical technique of choice to characterise polymers and separate mixtures into fractions including polymer, oligomer, monomer and any non-polymeric additives. GPC/SEC is also the ‘go- to’ technique for characterising the molecular weight distribution of polymers.
However, increasingly widespread use of more complex synthetic polymers and macromolecules of natural origin such as proteins and peptides, requires advanced characterisation technologies to allow researcher gain a thorough understanding of their shape, structure and related physical properties. GPC/SEC systems combining measurements from multiple detectors not only provides increased amounts of data, but also information,
The new Ultravap Levante evaporator from Porvair Sciences
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