Various non-destructive SFS techniques for simultaneous recognition and monitoring of 1-amino pyrene and 1-napthyl amine in the mixture.

Abstract

The sensitive, non-destructive constant wavelength (CW) and constant energy (CE) SFS techniques have been used for the simultaneous determination of 1-amino pyrene (AP) and 1-napthyl amine (NA) in their mixtures without prior separation via optimization of different experimental conditions (ΔλCW 70.0nm, ΔνCE 4000.0cm-1, scan rate 240.0nm/min, 25.0°C, methanol). Amplitude-concentration plots have been linear for 1-amino pyrene, AP (0.01-0.1mg/L) and 1-napthyl amine, NA (0.1-1.0mg/L). In aqueous methanolic binary mixtures, the mean recoveries (RSD, LOD and LOQ) of AP were found to be 100.09% (0.053, 0.008mg/L and 0.034mg/L) for emission, 100.11% (0.141, 0.008mg/L, 0.034mg/L) for CWSFS, 100.05% (0.109, 0.007mg/L and 0.032mg/L) for first derivative CWSFS, 100.00% (0.148, 0.007mg/L and 0.031mg/L) for CESFS, 99.99% (0.109, 0.008mg/L and 0.035mg/L) for first derivative CESFS modes respectively. Additionally, for NA the mean recoveries (RSD, LOD and LOQ) were 100.29% (0.360, 0.046mg/L and 0.204mg/L) for emission, 100.06% (0.089, 0.098mg/L, 0.436mg/L) for CWSFS, 100.09% (0.144, 0.065mg/L and 0.288mg/L) for first derivative CWSFS, 100.05% (0.178, 0.077mg/L and 0.339mg/L) for CESFS, 100.03% (0.181, 0.082mg/L and 0.364mg/L) for first derivative CESFS modes respectively. Considering their safety and greenness, these methods might be considered as green tools using analytical eco-scale approaches (eco-scale score 88.0).