Ultrasensitive fluorescence detection of glutaraldehyde in water samples with bovine serum albumin-Au nanoclusters |
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| Authors: | Xianxiang Wang Peng Wu Yi Lv Xiandeng Hou |
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| Affiliation: | aCollege of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China;bCollege of Life & Science, Sichuan Agricultural University, Ya'an 625014, China;cAnalytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China |
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| Abstract: | Based on the cross-linking nature of BSA in the presence of glutaraldehyde (GA), the fluorescence of BSA-stabilized Au nanoclusters was effectively quenched by GA. A new method for ultrasensitive GA detection in water samples was thus developed with fluorescent BSA-stabilized Au nanoclusters. The fluorescence quenching of BSA-stabilized Au nanoclusters in the presence of GA fitted to Stern-Volmer equation. In the GA concentration range of 0.8–6 μM, a linear relationship of F0/F versus GA concentration was obtained with a limit of detection (LOD) of 0.2 μM. The relative standard deviation of 5 replicate measurements of 4 μM GA is 1.3%. This method shows good selectivity over other organics in water samples. The feasibility of the new sensor for GA in different water samples was demonstrated. |
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| Keywords: | Au nanoclusters Fluorescence Glutaraldehyde Bovine serum albumin Water sample |
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