کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1163472 | 1490964 | 2015 | 8 صفحه PDF | دانلود رایگان |
• Rapid and ultrasensitive screening of mercury ions are achieved by using gold nanoparticles based colorimetric method.
• Dual labeling strategy is adopted for sensing signal amplification.
• The proposed method is successfully used for analysis of mercury-poisoned animal tissues.
Rapid and ultrasensitive detection of trace heavy metal mercury(II) ions (Hg2+) are of significant importance due to the induced serious risks for environment and human health. This presented article reports the gold nanoparticle-based dual labeling colorimetric method (Dual-COLO) for ultrasensitive and rapid detection of Hg2+ using the specific thymine–Hg2+–thymine (T–Hg2+–T) as recognition system and the dual labeling strategy for signal amplification. Both qualitative and quantitative detections of Hg2+ are achieved successfully in aqueous samples. More importantly, the achieved detection limit of 0.005 ng mL−1 (0.025 nM) without any instruments is very competitive to other rapid detection methods even ICP-MS based methods. This Dual-COLO method is also applied directly for real water sample monitoring and, more importantly, applied in analysis of mercury poisoned animal tissues and body fluidic samples, indicating a potentially powerful and promising tool for environmental monitoring and food safety control.
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Journal: Analytica Chimica Acta - Volume 868, 8 April 2015, Pages 45–52