Mega Sale! Save 26% on the Quanmin 12.5mmx45mmx1.0 mm 240-640nm Holmium Glass Filter for Wavelength in The UV/Visible and assessing The wavelength Accuracy of Your Spectrophotometer by Quanmin at Veteran Films. MPN: QM-Holmium Glass filter-240-640nm. Hurry! Limited time offer. Offer valid only while supplies last. Suggestions for Use Holmium presents a wide range of crisply resolvable peaks which are easily used to correlate the wavelength indicator on your spectrophotometer to the known Holmium peaks. The initial procedure should be to scan the filter over the useable range to assure that all of the peaks can be resolved. Alter the slit width and scan rate to produce a useable spectra. Check each peak to assure that the reading on your spectrophotometer is within the manufacturer's tolerances for the
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