间苯二酚
检出限
化学
苯胺
纳米化学
盐(化学)
过氧化氢酶
过氧化物酶
核化学
显色反应
比色法
色谱法
盐酸
萃取(化学)
普鲁士蓝
线性范围
无机化学
试剂
酶
有机化学
电化学
物理化学
电极
作者
Chunqiu Xia,Wen-Ying Huang,Xiutang Kang,Pingyun Chen,Longjie You,Liangqia Guo
标识
DOI:10.1007/s00604-021-05112-5
摘要
Mo5N6 nanosheets were synthesized by a nickel-induced growth method and were found to possess peroxidase-like activity in acidic condition and catalase-like activity in weak basic condition. In acidic condition, Mo5N6 nanosheets can catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by H2O2 to form a blue color product (TMBOX). At the co-existence of 4-aminophenol (4-AP), 4-AP can react with H2O2 and TMBOX, resulting in the decrease of TMBOX and the fading of blue color. Therefore, a facile, sensitive colorimetric method for the quantitative detection of 4-AP was developed. The linear range for 4-AP was 1.0 to 80.0 μmol⋅L‒1 (R2 = 0.999), and the detection limit was 0.56 μmol⋅L‒1 based on 3σ/k. Resorcinol, aniline, humic acid, and common ions and anions in surface water did not interfere the determination of 4-AP. This colorimetric method was applied to measure the 4-AP in real water sample from Wulong River in Fujian Province of China. The relative standard deviation for the determination of 4-AP was ranged from 0.03 to 1.88%, and the recoveries from spiked samples were ranged between 99.2 and 107.6%. The determination results were consistent with those obtained by HPLC.
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