TY - JOUR ID - 700844 TI - Selective determination of mercury (II) in coastal water using bio- functionalized gold nanoparticles JO - Journal of Water and Environmental Nanotechnology JA - JWENT LA - en SN - 2476-7204 AU - Deshpande, Kanchanmala AU - Thekkedath, Anju AD - School of Chemical Sciences, Goa University, Goa, India, 403206 Y1 - 2022 PY - 2022 VL - 7 IS - 4 SP - 370 EP - 379 KW - Coastal water KW - Mercury ions KW - colorimetric sensing, Matrix effect KW - Surface Plasmon Resonance KW - lysine capped nanoparticle DO - 10.22090/jwent.2022.561201.1555 N2 - The key to simple and rapid detection of a large volume of samples lies in the hands of solution-based nanomaterial sensors. Quantification of mercury in the river and coastal water is analytically challenging due to the potential interference of the matrix. In this endeavor, lysine-capped gold nanoparticles (Lys-AuNPs) based colorimetric sensors are demonstrated here towards efficient detection of trace amounts of mercury ions (Hg2+) in coastal and estuarine water. The colorimetric behavior of Lys-AuNPs is related to surface plasmon resonance (SPR)During analysis, interestingly a decrease in the intensity of the original SPR peak at 530 nm was observed, with the concomitant appearance of a new peak at a longer wavelength due to agglomerated Lys- AuNPs. Developed sensors exhibit excellent performance in different environmental samples with high selectivity towards Hg2+ ions in the presence of other metal ions. For the analysis of coastal water samples, a low value of regression coefficient was observed due to the potential interference of salt in the sample. To overcome this, matrix-matching experiments were carried out. Developed Lys- AuNPs show good selectivity towards Hg2+ in matrixed matched diluted coastal water samples. With a sensitivity of 0.02 ppm, the sensor can be utilized to screen large numbers of coastal water samples for their Hg2+ content to satisfy coastal regulation norms. As a whole, this method is simple, sensitive, selective, cost-effective and can be used to screen large numbers of samples across the coastal area for monitoring Hg2+ concentration. UR - https://www.jwent.net/article_700844.html L1 - https://www.jwent.net/article_700844_3c4d02797464364f39d78ea4e8e1f220.pdf ER -