Nitrosonaphthol
National Institutes of Health
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Determination of urinary homovanillic acid (HVA) is an important analysis to establish the diagnosis and prognosis of…
1-Nitroso-2-naphthol reacts with various 5-hydroxyindoles as well as para-substituted phenols and guaiacols. Consequently, this…
Udenfriend‘s nitrosonaphthol test for 5-hydroxyindoleacetic acid (5-HIAA) is subject to interference by urinary phenolic acids…
To the Editor.— The article "False-Positive Tests for Urinary 5-Hydroxyindole-acetic Acid: Error in Laboratory Determination…
The nitrosonaphthol procedure for urinary 5-HIAA has been modified by using an excess of NaCl and adjusting the urine to a…