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Last Updated: Apr 16, 2021
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ASTM E685-93(2013)
Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography
Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography
E0685-93R13
ASTM|E0685-93R13|en-US
Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography
Standard
E685 Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography>
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Significance and Use
4.1 Although it is possible to observe and measure each of the several characteristics of a detector under different and unique conditions, it is the intent of this practice that a complete set of detector specifications should be obtained under the same operating conditions. It should also be noted that to completely specify a detector's capability, its performance should be measured at several sets of conditions within the useful range of the detector. The terms and tests described in this practice are sufficiently general that they may be used regardless of the ultimate operating parameters.
4.2 Linearity and response time of the recorder or other readout device used should be such that they do not distort or otherwise interfere with the performance of the detector. This requires adjusting the gain, damping, and calibration in accordance with the manufacturer's directions. If additional electronic filters or amplifiers are used between the detector and the final readout device, their characteristics should also first be established.
Scope
1.1 This practice is intended to serve as a guide for the testing of the performance of a photometric detector (PD) used as the detection component of a liquid-chromatographic (LC) system operating at one or more fixed wavelengths in the range 210 to 800 nm. Measurements are made at 254 nm, if possible, and are optional at other wavelengths.
1.2 This practice is intended to describe the performance of the detector both independently of the chromatographic system (static conditions) and with flowing solvent (dynamic conditions).