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Quantification of o,o ‘ -Dityrosine, o -Nitrotyrosine, and o -Tyrosine in Cat Urine Samples by LC/Electrospray Ionization-MS/MS Using Isotope Dilution

✍ Scribed by Marvin, Laure Féline; Delatour, Thierry; Tavazzi, Isabelle; Fay, Laurent Bernard; Cupp, Carolyn; Guy, Philippe Alexandre

Book ID: 125519087
Publisher: American Chemical Society
Year: 2003
Tongue: English
Weight: 134 KB
Volume: 75
Category: Article
ISSN: 0003-2700
DOI: 10.1021/ac020309w

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## Abstract A general procedure for screening of amperozide, __N__‐ethyl‐4‐[4,4‐bis(__p__‐fluorophenylbutyl)]‐1‐piperazine carboxamide, labelled with ^3^H and ^14^C was developed. Urine extracts were first fractionated by preparative reversedphase chromatography with an acetonitrile gradient elutio