Viscotek Triple/Tetra Detector array (TDA)


Catalog excerpts

Viscotek Triple/Tetra Detector array (TDA) - 1

VISCOTEK TRIPLE/TETRA MOLECULAR WEIGHT MOLECULAR SIZE MOLECULAR STRUCTURE The Viscotek TDA is a fully integrated detector containing refractive index, light scattering and intrinsic viscosity detectors. The refractive index detector is a deflective-type differential refractive index detector for measuring the concentration of a dissolved sample in solution. The unique design provides high sensitivity and the robust cell can handle higher backpressures than other Rl detectors. This allows the Rl detector to be placed in series with the other detectors The light scattering detector contains a right-angle light scattering (RALS) detector for the measurement of molecular weight of isotropic scatterers (<1 5nm radius) with maximum sensitivity. It also contains a low angle light scattering (LALS) detector for measuring the absolute molecular weight of anisotropic scatterers. The LALS detector is the only true LALS detector available and measures at a lower angle than any other light scattering system. By combining RALS and LALS data, the light scattering detector can also calculate the radius of gyration. The intrinsic viscometer is a 4-capillary wheatstone-bridge design for measuring the intrinsic viscosity of molecules in solution. Combining molecular weight and intrinsic viscosity data together allows Mark-Houwink parameters on molecular structure and hydrodynamic radius to be calculated. The TDA also has space for a flow cell for a UV-PDA. The cell connects to the external detector via fiber optic cables. All of the detectors and the UV cell are housed with the columns in an oven for maximum temperature and detector stability. Malvern Instrument* Worldwide Sales and services centres in over 65 countries ©20U Malvern Instruments Limited MRK1973-02

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Viscotek Triple/Tetra Detector array (TDA) - 2

Specification Column and detector oven ±2500 μRIU 0.5 μRIU <3 μRIU/hr Cell volume Light source wavelength Detector range Linear range Baseline noise Baseline drift RALS detector angle LALS detector angle Cell volume Laser wavelength Laser power Bridge volume Detector range Linear range Baseline noise Baseline drift <3 mV/hr (approx. <3 Pa/hr) Water: 1.5 mL/min; THF: 3 mL/min Pixel width Wavelength range Cell volume Integrator outputs Power consumption PDA module connected via fiber optics to cell in TDA Detector range Intrinsic viscosity detector 1-5 x analytical columns; 1 x GE TricornTM...

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Viscotek Triple/Tetra Detector array (TDA) - 3

Malvern Instruments Limited Grovewood Road, Malvern, Worcestershire, UK, WR14 1XZ Tel +44 1684 892456 Fax +44 1684 892789 Malvern Instruments Worldwide Sales and service centers in over 65 countries; for details visit: Malvern Instruments is part of Spectris plc, the Precision Instrumentation and Controls Company. Spectris and the Spectris logo are Trade Marks of Spectris plc. All information supplied within is correct at time of publication. Malvern Instruments pursues a policy of continual improvement due to technical development. We therefore...

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