Department of Medical Engineering, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea.
Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.
Mikrochim Acta. 2021 Mar 19;188(4):129. doi: 10.1007/s00604-021-04783-4.
A fast and sensitive colorimetric paper sensor has been developed using silver nanoprisms (Ag NPRs) with an edge length of ~50 nm for the detection of free HS gas. We prepared two types of Ag NPRs-coated HS sensing papers: a multi-zone patterned paper for passive (diffusion mode), and a single-zone patterned paper for pumped mode of HS gas. The change in color intensity was quantitatively analyzed of Ag NPRs-coated paper after KCl treatment depending on the concentration of HS gas, from yellow to purplish brown. As a result, Ag NPRs-coated HS sensing paper showed good sensitivity with a linear range of 1.03 to 32.9 μM HS, high selectivity, and good reproducibility and stability, together with a fast response time of 1 min. The developed HS sensing paper was applied to detect the free HS gas released from three types of garlic including crushed, peeled, and fresh garlic. Therefore, it can be utilized as a simple, fast, and reliable tool for on-site colorimetric detection of free HS gas for quality control of dietary supplements and exhaled breath analysis.Graphical abstract.
一种快速灵敏的比色纸传感器已被开发出来，使用边长约为 50nm 的银纳米棱柱（AgNPRs）来检测游离的 HS 气体。我们制备了两种类型的 AgNPRs 涂层 HS 传感纸：多区域图案化纸用于被动（扩散模式），和单区域图案化纸用于泵送模式的 HS 气体。AgNPRs 涂层纸在 KCl 处理后，根据 HS 气体浓度的变化，从黄色变为紫棕色，其颜色强度的变化进行了定量分析。结果表明，AgNPRs 涂层 HS 传感纸具有良好的灵敏度，HS 的线性范围为 1.03 至 32.9 μM，高选择性，良好的重现性和稳定性，以及快速的响应时间为 1 分钟。所开发的 HS 传感纸已用于检测三种大蒜（包括压碎、去皮和新鲜大蒜）释放的游离 HS 气体。因此，它可以用作现场比色检测游离 HS 气体的简单、快速、可靠的工具，用于膳食补充剂的质量控制和呼气分析。
