UV-Vis spectrophotometers for pharmaceutical analysis ...

between 253.7 nm and 579.1 nm (Hg)c or at 486.0 and 656.1 nm (D 2) 6.If samples are measured above 635 nm, wavelength accuracy at 730 nm and above must be tested using didymiumd solution. USP allows the option to use glasses containing holmium or didymium rare earth metal oxides as an allowable alternative to solutions or atomic emission ... ................
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