Samarium Oxide Liquid (230-560 nm)

Purpose

Samarium perchlorate is a particularly useful reference material for checking the wavelength scale over the commonly used region from 200 nm to 500 nm.

Description and Discussion

Rare earth oxide in sulfuric acid, permanently sealed by heat Samarium (III) oxide in dilute perchloric acid, permanently sealed by heat fusion into a 10 mm far UV quartz cuvette.

Samarium perchlorate is a particularly suitable reference material for checking the wavelength scale of a spectrophotometer over the 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.

Approximate peak wavelength values (in nm) are:
235, 279, 290, 305, 318, 332, 344, 362, 374, 391, 401, 415, 464, 479

Note: The above values are for guidance only. Because the absorption bands are asymmetric, measured values will bespectral bandwidth dependent. The Calibration Certificate accompanying each Starna Samarium reference gives actual values measured at bandwidths of 0.10, 0.25, 0.50, 1.00, 1.50, 2.00, 3.00, 4.00 and 5.00 nm, and only these certified values should be used for instrument qualification. On request, Starna can provide certifiedvalues at other wavelengths and bandwidth values.

Typical spectra