School of Studies in Chemistry, Pt. Ravishanakar Shukla University, Raipur, CG-492010, India.
Department of Chemistry, Government Nagarjuna Post Graduate College of Science, Raipur, CG-492010, India.
Mikrochim Acta. 2020 Feb 18;187(3):173. doi: 10.1007/s00604-020-4129-7.
An optical colorimetric and smartphone-integrated paper device (SIPD) is demonstrated for determination of As (III) in water and soil samples using sucrose modified gold nanoparticles (AuNPs/Suc) as a nanoprobe. The mechanism for determination of As(III) is experimentally validated by performing UV-Vis, transmission electron microscope (TEM), Fourier transforms infra-red spectroscopy (FTIR) and dynamic light scattering (DLS) measurements. The density function theory (DFT) calculations using B3LYP with 6-311G (2d,2p) and LANL2DZ basis sets is used to theoretically prove the mechanism for determination of As(III). In addition, the paper fabricated with AuNPs/SuC was used as a nanoprobe for quantitative determination of As(III) using smartphone and ImageJ software. Calibration plot was linear over 10-800 μgL for colorimetric determination of As(III) with limit of detection (LOD) of 4 μgL acquired when the absorbance ratio obtained at 594 nm/515 nm. The linearity range of 50-3000 μgL with LOD of 20 μgL was determined using smartphone-integrated paper device. AuNPs/Suc is successfully employed for determination of As (III) from contaminated water and soil samples in colorimetry and SIPD. Graphical abstractColorimetric and Smartphone-integrated paper device used for selective detection of arsenic from contaminated water samples using sucrose modified gold nanoparticles (AuNPs/Suc) as a sensing probe.
一种光学比色和智能手机集成的纸质装置（SIPD）被展示用于使用蔗糖修饰的金纳米粒子（AuNPs/Suc）作为纳米探针测定水样和土壤样品中的 As（III）。通过进行紫外-可见光谱、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）和动态光散射（DLS）测量，实验验证了测定 As(III)的机制。使用 B3LYP 与 6-311G（2d,2p）和 LANL2DZ 基组进行密度泛函理论（DFT）计算，从理论上证明了测定 As(III)的机制。此外，使用 AuNPs/SuC 制造的纸张被用作纳米探针，通过智能手机和 ImageJ 软件定量测定 As(III)。比色法测定 As(III)的校准曲线在 10-800 μgL 范围内呈线性，在 594nm/515nm 处获得的吸光度比值时，检测限（LOD）为 4 μgL。使用智能手机集成的纸质装置，线性范围为 50-3000 μgL，检测限为 20 μgL。AuNPs/Suc 成功用于比色法和 SIPD 中测定受污染水样和土壤样品中的 As(III)。
