- UV and Visible Wavelength
Description: Samarium (III) oxide in perchloric acid.
Usage: Assessment of wavelength scale accuracy in both UV and
range: 230 nm to 560 nm, instruments with SBW of less than 5 nm.
Configuration: Far UV quartz cells that have been permanently
– UV and Visible Wavelength
Samarium perchlorate is a particularly suitable
reference material for checking the wavelength scale of a spectrophotometer
over the most commonly used range of 200 to 500 nm, as it has peaks
throughout this region. Many of the peaks are very narrow, providing
very accurate location of the peak wavelengths. With a half bandwidth
of as little as 5 nm, some peaks provide a very convenient way of
checking instrument resolution also. Shown below is this effect observed
on the peak couple at 233-235 nm.
Consists of one sealed cell, with certified peak at spectral bandwidth
values of 0.10 nm, 0.25 nm,
0.50 nm, 1.00 nm, 1.50 nm, 2.00 nm and 3.00 nm.