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August 1970


Author Affiliations

Departments of Medicine Sections of Dermatology Veterans Administration Hospital Long Beach, Calif 90801

Arch Dermatol. 1970;102(2):237. doi:10.1001/archderm.1970.04000080109031

To the Editor.—  A simplified, compact, and accurate screening device for rapidly detecting porphyrinuria has recently become available. Called a Fluorescent Analyzer (Ultra Violet Products, Inc., San Gabriel, Calif), it is a viewing box containing two 4-w tubular fluorescent lamps which emit an ultraviolet spectrum from 3,200 Angstroms to 4,200 A, with a peak at 3'660 A. This radiation passes immediately through a flat glass filter appropriately selected to remove as much of the visible spectrum as possible. In front of this a metal shelf provides for suspending from one to three centrifuge tubes (or test tubes) containing specimens to be examined. A hinged door-like segment of the apparatus allows the samples to be placed and removed easily; when it is closed it furnishes a dark chamber, bearing in the front a monocular viewing port which interposes another appropriate filter. This method eliminates the need for using a darkened room

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