Pushing the Limits of Mercury Sensors with Gold Nanorods

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• 作者：Matthew Rex ; Florencio E. Hernandez ; and Andres D. Campiglia
• 刊名：Analytical Chemistry
• 出版年：2006
• 出版时间：January 15, 2006
• 年：2006
• 卷：78
• 期：2
• 页码：445 - 451
• 全文大小：426K
• 年卷期：v.78,no.2(January 15, 2006)
• ISSN：1520-6882

文摘

The method presented here provides a direct way todetermine mercury in tap water samples at the parts-per-trillion level. Its outstanding selectivity and sensitivityresults from the well-known amalgamation process thatoccurs between mercury and gold. The entire proceduretakes less than 10 min. No sample separation or samplepreconcentration is required. The only step prior tomercury determination consists of mixing the watersample with a gold nanorod solution in sodium borohydride. The analytical figures of merit demonstrate preciseand accurate analysis at the parts-per-trillion level. Thelimit of detection (6.6 × 10^-13 g·L^-1) shows excellentpotential for monitoring ultralow levels of mercury in watersamples.