The DIONEX AD20 Absorbance Detector is a dual-beam, variable wavelength photometer designed for high-precision absorbance measurements in liquid chromatography (HPLC) applications.
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The DIONEX AD20 Absorbance Detector utilizes two light sources—a deuterium lamp for ultraviolet (UV) detection and a tungsten lamp for visible (VIS) wavelength operation—to provide full spectral capability. It features programmable wavelength selection and automatic calibration, ensuring precision, reproducibility, and ease of use. The detector is designed for compatibility with standard bore and microbore flow cells, making it versatile for various analytical needs.
Features:
Dual-Beam Optical System: Employs a fiber-optic beamsplitter and concave holographic diffraction grating for accurate measurements.
Light Sources: Includes a 30 W deuterium lamp for UV spectrum analysis and a 10 W tungsten lamp for VIS spectrum analysis.
Wavelength Range: Operates from 190 to 800 nm, with continuous selection in 1 nm steps.
Wavelength Accuracy: Maintains an accuracy of ±1 nm.
Bandwidth: Offers an 8 nm bandwidth for optimal resolution.
Absorbance Range: Provides discrete settings from 0.001 to 2.0 AU.
Autozero Capability: Features a 2 AU autozero with ±100 µAU accuracy.
Noise: Less than 10 µAU peak-to-peak at 254 nm with a 2-second rise time.
Drift: Less than 100 µAU/hour after warm-up and less than 100 µAU/°C after warm-up.
Filter Rise Time: Selectable from 0.05 to 10.0 seconds.
Analog Output Range: Discrete settings from 0.001 to 2.0 AUFS.
Cell Body: Constructed from PEEK material.
Cell Volume and Optical Path Length: Standard bore cell with 9 mL volume and 10 mm optical path length.
Maximum Operating Pressure: Up to 200 psi with a heat exchanger; up to 500 psi without a heat exchanger.
Chemical Compatibility: Avoid using bases stronger than 0.1 M to prevent etching of silica windows.
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The DIONEX AD20 Absorbance Detector is a dual-beam, variable wavelength photometer designed for high-precision absorbance measurements in liquid chromatography (HPLC) applications.
