II Analytical Concepts MiniaturePhotometersfor LiquidChromatography
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چکیده
A series of miniature photometers has been developed for use as on-stream detectors in systems for liquid chromatography. All of the detectors feature dual-beam, dual-wavelength operation without mechanical or electrical switching of either wavelength or signal. The two types of detectors originally developed-ultraviolet (254 and 280 nm) and colorimetric (any two choices of visible wavelengths)-have been integrated into a single modular instrument that can be converted from ultraviolet to use with visible wavelengths by substituting source and filter modules. Both straight-through vertical quartz tube flow cells of 3-mm i.d. and Z-cell modules with 10-mm light pathlengths are available. A single-unit power-source and rangeswitching box is used with any configuration of the detector.
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تاریخ انتشار 2004