Transcription of <197> SPECTROPHOTOMETRIC IDENTIFICATION …
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<197> SPECTROPHOTOMETRIC IDENTIFICATION …
USP 35 Chemical Tests / 197 spectrophotometric identification Tests133 Tartrate Dissolve a few mg of a tartrate salt in 2 dropsgraphic chamber with the bottom edge touching the Devel-of sodium metaperiodate solution (1 in 20). Add a drop ofoping Solvent. When the solvent front has risen about 101 N sulfuric acid, and after 5 minutes add a few drops ofcm, remove the sheet from the chamber, and expose thesulfurous acid followed by a few drops of fuchsin sulfuroussheet to ammonia vapor. Examine the chromatogram underacid TS: a reddish-pink color is produced within 15 UV light. Record the positions of the majoryellow fluorescent spots: the RF value of the principal spotThiocyanate With ferric chloride TS, solutions of thiocy-obtained from the Test Solution and from the Mixed Testanates yield a red color that is not destroyed by moderatelySolution corresponds to that obtained from the Standardconcentrated mineral With hydrochloric acid, solutions of thiosul-fates yield a white precipitate that soon turns yellow, andsulfur dioxide, which blackens filter paper moistened
134 〈197〉 Spectrophotometric Identification Tests / Chemical Tests USP 35 ysis. The reference 〈197K〉 in a monograph signifies that the and minima at the same wavelengths and absorptivities
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