检出限
溶剂
荧光
有机溶剂
含水量
近红外光谱
化学
红外线的
线性范围
内容(测量理论)
微量
自来水
色谱法
环境科学
化学工程
有机化学
环境工程
光学
医学
数学分析
物理
替代医学
岩土工程
数学
病理
工程类
作者
Xuehao Ma,Xilang Jin,Haiyan Bai,Lei Ma,Xiao Li,Xingliang Fang,Weixing Chen,Mengyao She
标识
DOI:10.1016/j.saa.2023.123791
摘要
Water content was an essential indicator in organic solvents, and it was necessary to develop a facile, cheap and readily available tool for the real-time, specifical and sensitive detection of water content. In this work, two novel D-π-A type near-infrared fluorescence sensors (DCM-1 and DCM-2) were designed and synthesized for the detection of trace water in organic solvents. DCM-1 and DCM-2 with solvent-dependent effects and large Stokes shift (>120 nm) showed good linear “intensity-to-content” relationships in four commonly-used organic solvents, and accomplished the ultra-fast and high-accuracy detection of the trace water in organic solvents. More importantly, a portable, fast, and accurate smartphone-assisted visual assay was designed for visual quantitative detection of the water content in organic solvents with a detection limit as low as 1.028 % v/v (e.g. in ethanol) and a wide detection range (0–60 % v/v). The smartphone-based visual assay was further applied to estimate the water content in disinfection alcohol and commercial liquor, which furnished a new strategy and broad prospects to achieve the accurate onsite detection of water content.
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