Multisyringe Flow Injection Analysis for Determination of 1-Naphthylamine in Water Samples |
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Authors: | Jorge L Guzmán Mar Leticia López Martínez Pedro L López de Alba Jesús E Castrejón Durán Víctor Cerdà Martín |
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Institution: | (1) Instituto de Investigaciones Científicas, Universidad de Guanajuato, Cerro de la Venada s/n, C.P. 36040 Guanajuato, Guanajuato, Mexico;(2) U.A.M. Reynosa-Aztlán, Universidad Autónoma de Tamaulipas, Calle 16 y Lago de Chapala, C.P. 88740 Reynosa, Tamaulipas, Mexico;(3) Departamento de Química, Universidad de Las Islas Baleares, Carretera de Valldemossa Km. 7.5, E-07122 Palma de Mallorca, Baleares, Spain |
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Abstract: | 1-Naphthylamine (NPA) is one of the main degradation products of pesticides derived from naphthalene, and a well-known bladder
carcinogen in men. The Griess assay is used for NPA determination because of its high sensitivity and selectivity. The azo
dye 4-(sulphophenylazo)-1-naphthylamine is formed, which shows a peak maximum at 540 nm. After optimizing multisyringe flow
injection analysis (MSFIA) parameters, the analytical characteristics of the method were obtained, with a working linear range
of 0.5 to 14 mg L−1, according to the equation A = 0.0738±0.0019 NPA] + 0.0028 ± 0.0042, r = 0.9997. Values for RSD (%) and Erel (%) were calculated for the concentration levels of 0.5, 6 and 12 mg L−1; values obtained were 1.1, 0.4 and 0.3% for RSD and 0.8, 0.3 and 0.2% for Erel, respectively. LD was 0.01 mg L−1 and LQ was 0.04 mg L−1 NPA. The MSFIA procedure for the determination of NPA was applied to different water samples (well water, tap water, seawater,
and wastewater from the EDAR-1, Palma de Mallorca water treatment plant), with satisfactory results and a throughput of 90
samples per hour. |
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Keywords: | : Multisyringe flow injection analysis (MSFIA) 1-naphthylamine (NPA) Griess reaction pesticides water samples |
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