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        基于Fe(III) 和鄰苯二胺顯色反應快速檢測硫化物
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        1. 西安醫學院 藥學院,陜西 西安 710021;2. 陜西省農業檢驗檢測中心,陜西 西安 710003

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        Rapid detection of sulfide based on the chromogenic reaction of iron (III) ion and o-phenylenediamine
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        1. Department of Pharmacy, Xi'an Medical University, Xi'an 710021, Shaanxi, China; 2. Shaanxi Agricultural Inspection and Testing Center, Xi'an 710003, Shaanxi, China

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          摘要:

          比較了不同金屬離子(Fe2+、Fe3+、Cu2+、Zn2+、Al3+、Na+、Ca2+、Mg2+、K+、Ag+、Cr3+)對鄰苯二胺(OPD)的氧化能力,基于 Fe3+能直接氧化 OPD 產生黃色發熒光的產物而構建了 Fe3+-OPD 顯色體系。結合硫化物的還原性以及對金屬離子較強的親和性,開發了一種通過比色法選擇性檢測硫化物的方法。結果表明,在 pH 4.0NaAc-HAc 緩沖液中,Fe3+-OPD 顯色體系的吸光度和熒光強度與 NaHS 的濃度分別在 10~200 μmol/L 和5~150 μmol/L 范圍內呈線性關系,熒光法的檢出限可達 0.1 μmol/L,體系內其他還原性物質及硫醇對 NaHS 的檢測無干擾。將 Fe3+-OPD 顯色體系結合紙芯片構建的紙基比色體系藍色分析色道值(B 值)與 NaHS 的濃度在20~150 μmol/L 范圍內呈線性關系,檢出限為 2 μmol/L,并可用于定量檢測加標自來水和胎牛血清中的硫化物。關鍵詞:Fe( Ⅲ );鄰苯二胺;硫化物;硫化氫;紙基比色法;功能材料

          Abstract:

          A Fe3+-OPD chromogenic system was developed based on the formation of yellow and fluorescent product from direct oxidation of OPD via Fe3+, which was selected from investigation on the oxidation ability of different metal ions (Fe2+, Fe3+, Cu2+, Zn2+, Al3+, Na+, Ca2+, Mg2+, K+, Ag+, Cr3+) towards o-phenylenediamine (OPD). A colorimetric method for selective detection of sulfide was then developed combining the reducibility of sulfide and its strong affinity towards metal ions. The results showed that, in NaAc-HAc buffer solution at pH 4.0, the absorbance and fluorescence intensity of Fe3+-OPD chromogenic system showed a good linear relationship with NaHS concentration ranging 10~ 200 μmol/L and 5~150 μmol/L, respectively. The fluorescence method exhibited a detection limit of 0.1 μmol/L with no observed interference from other reducing substances and thiols. The paper-based colorimetric system, constructed from Fe3+-OPD chromogenic system in combination with test paper, displayed a good linear relationship between blue color value (B value) and the concentration of NaHS in the range of 20~150 μmol/L, and a detection limit of 2 μmol/L. The paper-based colorimetric system was further applied for sulfide quantification in spiked tap water and fetal calf serum.

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        趙靈芝,趙 柳,張小清,羅杰,楊喆.基于Fe(III) 和鄰苯二胺顯色反應快速檢測硫化物[J].精細化工,2023,40(6):

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        • 收稿日期:2022-09-06
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        • 在線發布日期: 2023-06-28
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