广东药科大学 公共卫生学院,广东 广州 510310
贺锦灿,博士,副教授,研究方向:纳米材料与光谱分析,E-mail:hejincan300@163.com
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牟芝梅,邓治臣,赵静銮等.锰/锆-双金属有机骨架纳米酶比色法检测水中痕量氟[J].分析测试学报,2023,42(11):1405-1412.
MOU Zhi-mei,DENG Zhi-chen,ZHAO Jing-luan,et al.Colorimetric Detection of Trace Fluoride in Water Based on Manganese/Zirconium Bimetallic Organic Framework Nanoenzyme[J].Journal of Instrumental Analysis,2023,42(11):1405-1412.
牟芝梅,邓治臣,赵静銮等.锰/锆-双金属有机骨架纳米酶比色法检测水中痕量氟[J].分析测试学报,2023,42(11):1405-1412. DOI: 10.19969/j.fxcsxb.23060603.
MOU Zhi-mei,DENG Zhi-chen,ZHAO Jing-luan,et al.Colorimetric Detection of Trace Fluoride in Water Based on Manganese/Zirconium Bimetallic Organic Framework Nanoenzyme[J].Journal of Instrumental Analysis,2023,42(11):1405-1412. DOI: 10.19969/j.fxcsxb.23060603.
该文设计合成了一种新型锰/锆-双金属有机框架(Mn/Zr-MOF)纳米材料,并用于水中痕量氟的检测。顺磁性金属锰、锆赋予了Mn/Zr-MOF类过氧化物酶活性,而锆金属能选择性识别氟离子(F,-,)。Mn/Zr-MOF可催化过氧化氢氧化3,3',5,5'-四甲基联苯胺(TMB)生成蓝色oxTMB,其最大吸收波长为652 nm。体系中的F,-, 可与锆特异性结合,并抑制Mn/Zr-MOF的催化活性,使体系颜色变浅。F,-, 质量浓度与652 nm处的吸光度呈负相关关系,据此建立了一种检测F,-, 的比色法。方法的线性范围为0.40~5.0 mg/L,检出限为0.16 mg/L。将该方法应用于实际水样中F,-, 测定,加标回收率为97.6%~106%,相对标准偏差为0.27%~5.2%。该方法快速、灵敏、选择性好,在实际样品分析中具有较大潜力。
In this paper,a new manganese/zirconium bimetallic organic framework(Mn/Zr-MOF) nanomaterial was designed and synthesized. Paramagnetic metal manganese and zirconium endow Mn/Zr-MOF with peroxidase-like activity,while zirconium can selectively recognize fluoride ion(F,-,). Mn/Zr-MOF nanomaterial exhibits excellent peroxidase-like activity. It can catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB) with hydrogen peroxide to generate blue oxTMB,with a maximum absorption wavelength of 652 nm. If F,-, exists in the system,it can selectively bind with Zr and exerts inhibitory effect the catalytic activity of Mn/Zr-MOF,resulting in a lighter color in the system. The concentration of F,-, was negatively correlated with the absorbance at 652 nm,thus a colorimetric method for F,- ,detecting was established. The linear range of the method was 0.40-5.0 mg/L,and the detection limit was 0.16 mg/L. The method was applied to the determination of F,-, in actual water samples,with recovery of 97.6%-106% and relative standard deviation of 0.27%-5.2%. The proposed method is fast,sensitive,and highly selective,holding great potential in actual sample analysis.
金属有机框架氟比色法纳米酶类过氧化物酶活性
metal-organic frameworkfluoridecolorimetrynanoenzymeperoxidase-like activity
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