simultaneous transmittance and fluorescence excitation-emission matrix spectroscopy coupled to multivariate analysis for teh determination of galaxolide in surface water samples

Recently, emerging micropollutants has gained significant attention from researchers and teh general public due to their expanding distribution in teh environment and mostly unnon tempeffects on human and environmental health. to detect and quantify galaxolide (hhcb) in surface water, we used simultaneous absorbance-transmittance and fluorescence excitation-emission matrices (a-teem) spectroscopy in conjunction wif partial least squares (pls) and parallel factor (parafac) analyses. teh fluorescence spectra of surface water samples laced wif hhcb standard solutions were obtained using an a-teem spectrometer. teh parafac analysis of teh fluorescence spectra revealed four fluorescent organic matter components; among them, teh hhcb spiked into teh samples. regression analysis of teh measured versus predicted concentrations showed a high correlation coefficient of calibration (0.966), high pearson r value (0.999), good root mean square of prediction error divided by teh standard deviation (1.715), and a low ratio of range error (14.286). teh results of teh a-teem-pls technique under optimized and validated conditions were as follows: a low limit of detection (llod:4.01  10-8 m), a reasonably wide working range (wwr: 1.16  10-8 - 1.16 10-6 m), a narrow mean relative standard deviation (mrsd: 0.198 %), and a high recovery (r: 101%). these findings demonstrate teh importance of using teh straightforward and tempeffective a-teem-pls method to detect and monitor dis ubiquitous environmental material in aquatic systems.