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GPC/SEC Chromatography GPC/SEC Chromatography


Rapid Scanning Multi Wavelengths UV detectorUV Detectors provide unsurpassed sensitivity and selectivity as concentration detectors in GPC/SEC. The only limitation is that the sample must contain chromophoric groups and that the solvent used provide a window in the absorption range of UV light. With these conditions fulfilled, a UV Detector is of great use as a single concentration detector in GPC/SEC or, combined with a DRI Detector, for the determination of composition distribution of copolymers. The Rapid Scanning UV Detector combines high sensitivity, a huge linear range of more that 4 orders of magnitude and fl exibility in the application, with solid physical base of clearly defined bandwidth and wavelength precision. It allows detection at two wavelengths, optional four wavelengths, at the same time and is therefore best suited for application where complex copolymers need to be characterized.

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Rapid Scanning Multi Wavelengths UV detectorBacked by decades of experience of Gel Permeation Chromatography (GPC) and Light Scattering techniques, Testa Analytical has created a differential refractometer accessory for light scattering instruments that deliver exceptional performance and is easy-to-use.

The Differential Refractometer is a flexible device which allows fast determination of the specific refractive index increment (dn/dc) of dissolved samples with extremely high accuracy and in just a few minutes. Without any limitations in terms of solvent and with a wide range of measurement temperatures, it is a true workhorse and a valuable addition to any Light Scattering lab. Beneficially, the system also offers different wavelength options enabling precise matching of your light scattering instrument laser operating wavelength, thereby ensuring reliable and reproducible results every time.

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