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Abstract:
将滚环扩增技术与铜纳米线相结合进行信号放大,建立高选择性、高灵敏的汞离子比色检测新方法.以链霉亲和素修饰的磁珠为探针捕获和分离基质,将生物素修饰的引物链固定到其表面.汞离子存在时,模板链将通过T-Hg2-T作用与引物链结合.加入T4连接酶及DNA聚合酶引发滚环扩增反应形成超长单链DNA.与短单链DNA互补形成的长双链DNA可作为铜纳米线沉积模板,加入盐酸释放出大量铜离子催化底物氧化显色.在0.005~1.0 nmol/L范围,汞离子浓度与吸收信号呈良好线性关系,检出限低至3.7 pmol/L.
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分析试验室
ISSN: 1000-0720
CN: 11-2017/TF
Year: 2020
Issue: 1
Volume: 39
Page: 28-32
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count: -1
Chinese Cited Count:
30 Days PV: 2
Affiliated Colleges: