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Instrument Database:
Dionex Corporation - AD20 Absorbance Detector
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| Year of introduction |
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| Status |
historical ( out of sale ) |
| Company |
Dionex Corporation
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| Categories |
Chromatography: LC/HPLC
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The Dionex AD20 Absorbance Detector is a dual-beam, variable wavelength photometer. Full spectral capability is provided by two light sources: a deuterium lamp for ultraviolet detection and a tungsten lamp for visible wavelength operation. The AD20 features programmable wavelength selection and automatic calibration for precision, reproducibility, and ease-of-use.
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| Specifications |
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Optical System: Dual-beam, fiber-optic beamsplitter and concave holographic diffraction grating Light Sources: Deuterium lamp (30 W) for ultraviolet spectrum analysis; tungsten lamp (10 W) for visible spectrum analysis Wavelength Range: 190 to 800 nm variable; continuous in 1 nm steps Wavelength Accuracy: ± 1 nm Bandwidth: 8 nm Absorbance Range: Discrete settings of 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, and 2.0 AU Autozero Capability: 2 AU Autozero Accuracy: ± 100 uAU Noise: < 10 uAU peak-to-peak at 254 nm, 2-second rise time, flowing deionized water Drift: < 100 uAU/hour (after warm-up) < 100 uAU/ºC (after warm-up) Filter Rise Time: Discrete settings of 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 5.0, or 10.0 seconds Analog Output Range: Discrete settings of 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, and 2.0 AUFS Cell Body: PEEK Volume and Optical Path Length: Standard bore cell, used with 4 mm (0.016 in) columns: 9 mL volume, 10 mm (0.002 in) optical path length Maximum Operating Pressure: 1.38 mPa (200 psi) with a heat exchanger; 3.45 mPa (500 psi) without a heat exchanger Chemical Compatibility: The use of a base stronger than 0.1 M is not recommended, as it will etch the silica windows.
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