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Visual detection of S2− with a paper-based fluorescence sensor coated with CdTe quantum dots via headspace sampling
Luminescence ( IF 3.2 ) Pub Date : 2021-05-28 , DOI: 10.1002/bio.4097 Yi Pan 1, 2 , Zheng Fang 2 , Hanjiao Chen 1 , Zhou Long 1 , Xiandeng Hou 1
Luminescence ( IF 3.2 ) Pub Date : 2021-05-28 , DOI: 10.1002/bio.4097 Yi Pan 1, 2 , Zheng Fang 2 , Hanjiao Chen 1 , Zhou Long 1 , Xiandeng Hou 1
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A simple method was developed in this work for facile and visual detection of S2− using a paper-based fluorescence (FL) sensor coated with CdTe quantum dots (QDs) by headspace sampling. With the addition of hydrochloric acid, the target S2− in the liquid phase would transform to H2S, which was released to headspace and quenched the FL of CdTe QDs in a linear manner through a gas–solid reaction, with any possible liquid-phase interference avoided. The regular quenching caused by S2− in analyte solution with increased concentration could be easily observed by the naked eye, and the limit of detection (LOD) for this method was 0.13 μM and 0.93 μM for FL and visual sensing, respectively, comparable or not to that by other sensing probes. A relative standard deviation of 1.2% was accomplished from seven replicated measurements, implying the high reproducibility, and the recovery for the spiked water samples ranging from 94 to 103%, and illustrating the satisfactory reliability of this method. Moreover, the preparation of this paper sensor was facile and did not require any complicated or time-consuming procedures for additional modification or functionalization as for other probes previously reported.
中文翻译：
通过顶空采样，使用涂有 CdTe 量子点的纸基荧光传感器对 S2− 进行视觉检测
在这项工作中开发了一种简单的方法，通过顶空采样，使用涂有 CdTe 量子点 (QD) 的纸基荧光 (FL) 传感器轻松和直观地检测 S 2-。随着盐酸的加入，液相中的目标 S 2−将转化为 H 2 S，H 2 S 被释放到顶空并通过气固反应以线性方式淬灭 CdTe QDs 的 FL，与任何可能的液体避免了相位干扰。S 2−引起的规律淬火肉眼可以很容易地观察到浓度增加的分析物溶液中的检测限（LOD），该方法的检测限（LOD）对于FL和视觉传感分别为0.13μM和0.93μM，与其他传感探针相当或不相上下。7 次重复测量的相对标准偏差为 1.2%，表明加标水样的高重现性和 94% 至 103% 的回收率，表明该方法具有令人满意的可靠性。此外，这种纸传感器的制备很容易，并且不需要任何复杂或耗时的程序来进行额外的修改或功能化，就像之前报道的其他探针一样。
更新日期：2021-05-28
中文翻译：
通过顶空采样，使用涂有 CdTe 量子点的纸基荧光传感器对 S2− 进行视觉检测
在这项工作中开发了一种简单的方法，通过顶空采样，使用涂有 CdTe 量子点 (QD) 的纸基荧光 (FL) 传感器轻松和直观地检测 S 2-。随着盐酸的加入，液相中的目标 S 2−将转化为 H 2 S，H 2 S 被释放到顶空并通过气固反应以线性方式淬灭 CdTe QDs 的 FL，与任何可能的液体避免了相位干扰。S 2−引起的规律淬火肉眼可以很容易地观察到浓度增加的分析物溶液中的检测限（LOD），该方法的检测限（LOD）对于FL和视觉传感分别为0.13μM和0.93μM，与其他传感探针相当或不相上下。7 次重复测量的相对标准偏差为 1.2%，表明加标水样的高重现性和 94% 至 103% 的回收率，表明该方法具有令人满意的可靠性。此外，这种纸传感器的制备很容易，并且不需要任何复杂或耗时的程序来进行额外的修改或功能化，就像之前报道的其他探针一样。
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