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The absorption of hemoglobin (Hb) from controlled urine samples was observed using the technique of evanescent cavity ring-down spectroscopy (e-CRDS). A room temperature, alexandrite laser pumped LiF:F/sub 2/+ color-center pulsed laser was used to excite Hb at 425 nm. A minimum absorbance level of 2.57 /spl times/ 10/sup -4/ was achieved corresponding to a minimum detectable concentration of Hb in...
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