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Analytical Instrumentation
Viscometer Detector Enhances GPC/SEC Analysis for Polymer Development
It’s finally here—true ASTM D445 automation at a price guaranteed to make your lab manager smile.
Small and Affordable Low Solvent/Sample Volume Faster Through-Put
100-fold tube ranges KinVis up to 5000 cSt
10 place auto sampler!
Now with
Selectable temperature 20° to 100°C
Smart table technology – save space, save time, save money!
For those working at the forefront of polymer development, adding a Malvern (UK) Viscotek viscometer detector into gel permeation/size exclusion chromatography (GPC/SEC) set ups can help deliver the enhanced information need to achieve challenging performance specifications.
Studies with evolving commercial polymers, such as polymethylmethacrylate (PMMA) and polylactic acid (PLA), show how the structural information revealed by measuring viscosity parameters enables researchers to intelligently modify polymer chain length and branching to meet precise goals. Malvern Viscotek viscometers can be supplied as part of an integrated triple detector Viscotek GPC/SEC system or as an addition to any existing separation system.
GPC/SEC is a central analytical technique for the analysis of proteins, polymers and macromolecules because of its ability to measure defining characteristics such as molecular weight, molecular weight distribution and molecular size. Modern GPC/SEC systems typically incorporate multiple detectors that work together to increase information flow.
Viscosity measurements serve a dual function within this context. When used with a refractive index (concentration) detector, they give information on molecular weight/density. This permits the determination of accurate molecular weight distributions without a relevant standard, an important benefit for new or significantly modified polymers where appropriate reference materials may not be available. On the other hand, if molecular weight is directly measured via a light scattering technique, a viscometer enables the quantification of structural characteristics such a chain branching. This information supports the sophisticated control needed to develop materials closely matched to specific applications, to manufacture stable ocular lenses, for example, in the case of PMMA, and to replace conventional polymers with an environmentally benign alternative, in the case of PLA.
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Online Distillation Analyser Now Includes Density Analysis for Cetane Index
Oil Testing Equipment Suppliers Worldwide For Over 80 Years
PAC (USA), a specialist global provider of advanced analytical instruments for laboratories and online process applications, recently released its latest version of the MicroDist, the most advanced online distillation analyser on the market. Its unique technology provides complete and accurate distillation and density analysis in a single instrument. With the new density analysis, the applications for the MicroDist are expanded, including calculating the Cetane Index for diesel fuel process streams and intermediate blends according to ASTM D4737 and D976.
Criterion Water Bath System
• Certified for operations in Class 1, Group D, Division 2 areas
• Digitally controlled Temperature (Either degrees F/C)
• Maintains the programmed temperature within specified ASTM/API Temperature Guidelines
PO Box 230305, Houston, TX 77223-0305 Tel: (713) 926-2623
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6952 Lawndale Houston, TX 77023-25995 Fax: (713) 926-7736
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With complete distillation results in less than 10 minutes that correlate to ASTM D86, the MicroDist enables refineries to make quick and accurate decisions to continuously control the process and increase profitability. With this instrument, refineries are able to maximise production with cut point optimisation of the crude oil; increasing T90% by 1°C may result in .5% to 1% additional diesel production, which can, depending on production levels, increase profits up to $1 Million.
"Refining business complexity keeps increasing, making timely decisions even more important to drive improved profitability for our customers,” said Daniel Benitez, PAC Vice-President of Process Analytics. “Recognising this challenge, the expanded analytical capability of the MicroDist supports process plant optimisation and reduces product quality giveaway.”
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