江南大学 化学与材料工程学院,江苏 无锡 214122
王光丽,博士,教授,研究方向:纳米分析化学研究,E-mail:glwang@jiangnan.edu.cn
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郭澳环,李苹,王光丽.基于Hg2[Fe(CN)6]纳米酶的多功能酶级联传感体系检测葡萄糖和酸性磷酸酶[J].分析测试学报,2023,42(04):488-494.
GUO Ao-huan,LI Ping,WANG Guang-li.Detection of Glucose and Acid Phosphatase Using a Multifunctional Enzyme Cascade Sensing System Based on Hg2[Fe(CN)6] Nanozyme[J].Journal of Instrumental Analysis,2023,42(04):488-494.
郭澳环,李苹,王光丽.基于Hg2[Fe(CN)6]纳米酶的多功能酶级联传感体系检测葡萄糖和酸性磷酸酶[J].分析测试学报,2023,42(04):488-494. DOI: 10.19969/j.fxcsxb.22100601.
GUO Ao-huan,LI Ping,WANG Guang-li.Detection of Glucose and Acid Phosphatase Using a Multifunctional Enzyme Cascade Sensing System Based on Hg2[Fe(CN)6] Nanozyme[J].Journal of Instrumental Analysis,2023,42(04):488-494. DOI: 10.19969/j.fxcsxb.22100601.
该文基于Hg,2+,可与K,4,[Fe(CN),6,]原位反应形成Hg,2,[Fe(CN),6,]纳米酶的机理,并利用过氧化氢(H,2,O,2,)可激发Hg,2,[Fe(CN),6,]酶活性,以及焦磷酸盐(PPi)可通过与Hg,2+,结合阻止Hg,2,[Fe(CN),6,]纳米酶的形成的原理,构建了多功能酶级联传感平台。当葡萄糖存在时,葡萄糖氧化酶氧化葡萄糖生成H,2,O,2,,Hg,2,[Fe(CN),6,]催化H,2,O,2,分解产生的羟基自由基(·OH)可氧化底物3,3',5,5'-四甲基联苯胺(TMB)显色,从而实现葡萄糖的检测。该方法对葡萄糖检测的线性范围为0.10 ~ 500 μmol/L,检出限为30 nmol/L。当酸性磷酸酶(ACP)存在时,ACP可以水解PPi并释放出与PPi结合的Hg,2+,,Hg,2+,与K,4,[Fe(CN),6,]原位反应生成Hg,2,[Fe(CN),6,]纳米酶,进而可实现ACP的检测。结果表明,该方法对ACP检测的线性范围为0.03 ~ 50 U/L,检出限为0.007 0 U/L。该传感平台操作简单、灵敏度高,为多功能传感体系的设计提供了一种新的思路。
According to the formation of Hg,2,[Fe(CN),6,] nanozyme based on the in-situ reaction of Hg,2+, and K,4,[Fe(CN),6,],a multifunctional biosensing platform was constructed based on an enzyme cascade in which the activity of Hg,2,[Fe(CN),6,] depended on hydrogen peroxide(H,2,O,2,),as well as pyrophosphate(PPi) was able to bind to Hg,2+, and prevent the formation of Hg,2,[Fe(CN),6,] nanozyme.In the presence of glucose,glucose oxidase oxidized glucose to generate H,2,O,2,,and then Hg,2,[Fe(CN),6,] catalyzed the decomposition of H,2,O,2, to produce hydroxyl radicals(·OH) to oxidize the substrate of 3,3',5,5'-tetramethylbenzidine(TMB),which enabled the detection of glucose.The linear range of the method for glucose detection was 0.10-500 μmol/L,and the detection limit was 30 nmol/L.In the presence of acid phosphatase(ACP),ACP could hydrolyze PPi to release Hg,2+, that could otherwise be bound by PPi,which allowed the reaction of K,4,[Fe(CN),6,] with Hg,2+, to generate Hg,2,[Fe(CN),6,] nanozyme for catalyzing the oxidation of TMB.Results showed that the linear range of the method for the detection of ACP was 0.03-50 U/L,and the detection limit was 0.007 0 U/L.This sensing platform is different from the traditional detection system for single target,which provides a new idea for the design of multifunctional sensing systems with simple operation and high sensitivity.
纳米酶酶级联体系Hg2[Fe(CN)6]葡萄糖酸性磷酸酶(ACP)
nanozymeenzyme cascade systemHg2[Fe(CN)6]glucoseacid phosphatase(ACP)
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