[db:国别翻译]英国ISS Group Services Ltd
/9-9-I-9M-9M-9-9A-9-9G-9G-9E-1/ ISS组为纳米表面表征和微尺度的表面材料表征提供了一站式设施,从世……...
The ViscoStar® is an on-line differential viscometer for GPC that measures the intrinsic viscosity (IV) of polymers. It is best used in conjunction with the DAWN® or miniDAWN® multi-angle light scattering (MALS) detectors in SEC-MALS-IV analysis to determine absolute molar mass, size, molecular conformation, branching ratio and Mark-Houwink parameters.
The ViscoStar may also be used for traditional online IV applications, such as Universal Calibration or Mark-Houwink analyses of molecular weight and size, all supported by Wyatt’s ASTRA® chromatography software.
The ViscoStar incorporates several innovations that make it the most advanced differential viscometer available: automated thermal bridge tuning to ensure perfect bridge balance every run, a patented pump pulse suppression system that eliminates pressure fluctuations due to the GPC pump without loss of chromatographic resolution, and dual-Peltier thermal control for optimal isolation of the temperature-sensitive bridge from room temperature variations.
Features
Sensitivity: 100 ng of 100 kDa polystyrene in THF at 1 mL/min, with a standard 7.8 x 300 mm GPC column
Differential pressure noise: < 0.05 Pa
Differential pressure range: 6.9 kPa
Dynamic range: 135,000:1 for measuring small and large peaks simultaneously
Solvent compatibility: compatible with most aqueous and organic solvents
Capillary bridge autobalance: 10-min thermal, leak-free mechanism
Delay volumes: 8.1, 5.4 or 2.7 mL standard; 16.2 mL optional
Temperature control: 4 – 70 °C
Touch-panel display for immediate access to data, diagnostics and settings
Software: ASTRA chromatography software provides comprehensive analyses and user-friendly features including HPLC control, “One-click MW” and user-designed reports. Optional 21CFR11 support for GMP.
Applications
Polymers: absolute molar mass and size (distributions and moments), conformation and branching, Mark-Houwink parameter determination
Linear or branched polymers, co-polymers
Polymers not amenable to SEC-MALS analysis dissolved in semi-opaque or refractive-index-matched solvents, or polymers that fluoresce at the MALS laser wavelength
Most aqueous and organic solvents
/9-9-I-9M-9M-9-9A-9-9G-9G-9E-1/ ISS组为纳米表面表征和微尺度的表面材料表征提供了一站式设施,从世……...
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