GSO ASTM E958:2021
Gulf Standard
Current Edition
·
Approved on
01 July 2021
·
Standard Practice for Estimation of the Spectral Bandwidth of Ultraviolet-Visible Spectrophotometers
GSO ASTM E958:2021 Files
English
10 Pages
Current Edition
Reference Language
GSO ASTM E958:2021 Scope
1.1 This practice describes procedures for estimating the
spectral bandwidth of a spectrophotometer in the wavelength
region of 185 to 820 nm.
1.2 These practices are applicable to all modern spectrophotometer designs utilizing computer control and data handling.
This includes conventional optical designs, where the sample is
irradiated by monochromatic light, and ‘reverse’ optic designs
coupled to photodiode arrays, where the light is separated by a
polychromator after passing through the sample. For spectrophotometers that utilize servo-operated slits and maintain a
constant period and a constant signal-to-noise ratio as the
wavelength is automatically scanned, and/or utilize fixed slits
and maintain a constant servo loop gain by automatically
varying gain or dynode voltage, refer to the procedure described in Annex A1. This procedure is identical to that
described in earlier versions of this practice.
1.3 This practice does not cover the measurement of limiting spectral bandwidth, defined as the minimum spectral
bandwidth achievable under optimum experimental conditions.
1.4 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
standard.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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