caa a22 4500 467995605 CHVBK 20180323112556.0 cr unu---uuuuu 170328e19900101xx s 000 0 eng 10.1007/BF01244297 doi (NATIONALLICENCE)springer-10.1007/BF01244297 Spectrophotometric determination of 1-naphthylamine in urine with pentacyanonitrosylmanganate (II) [Elektronische Daten] [Rocío Gálvez Roncero, Francisco Manuel de Villena Rueda, Luis Polo Díez, R. Pérez Pérez] A new Spectrophotometric method is proposed for the determination of 1-naphthylamine (R), based on its reaction with Mn(CN)5NO2− to form Mn(CN)5NH2R3− and measurement of the absorbance at 472 nm. In aqueous medium the molar absorptivity of the manganese complex is maximum (ɛ = 8.0 × 1031 · mole−1 ·cm−1) in the pH range 5.0-10.0, the colour develops more rapidly at pH 10.0. The absorptivity is increased by a factor of 3.5 if the complex is extracted as an ion-associate into chloroform. The extraction efficiency is 99.2% for a single-step extraction, and a concentration factor of 5 can also be achieved. Linearity of response extends over the range 0.04-1.4 gmg/ml 1-naphthylamine, the coefficient of variation being 1.4% at the 0.29 μg/ml level (n = 6). The detection and determination limits are 0.005 and 0.018 μg/ml, respectively. The method is selective enough to allow the determination of 1-naphthylamine in the presence of considerable amounts of other amines, such as aminophenols and phenylenediamines. Results obtained in the determination of 1-naphthylamine in human urine were very satisfactory. Springer-Verlag, 1990 1-naphthylamine determination nationallicence pentacyanonitrosylmanganate(II) nationallicence spectrophotometry nationallicence urine nationallicence Gálvez Roncero Rocío Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut Manuel de Villena Rueda Francisco Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut Polo Díez Luis Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut Pérez Pérez R. Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut Microchimica Acta Springer-Verlag 102/1-3(1990-01-01), 151-158 0026-3672 102:1-3<151 1990 102 604 https://doi.org/10.1007/BF01244297 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01244297 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gálvez Roncero Rocío Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut NATIONALLICENCE 700 1- Manuel de Villena Rueda Francisco Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut NATIONALLICENCE 700 1- Polo Díez Luis Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut NATIONALLICENCE 700 1- Pérez Pérez R. Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, E-28040, Madrid, Spain aut NATIONALLICENCE 773 0- Microchimica Acta Springer-Verlag 102/1-3(1990-01-01), 151-158 0026-3672 102:1-3<151 1990 102 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer