咔唑腙为荧光指示剂的亚硝酸根传感器

焦晨旭; 焦东旭

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咔唑腙为荧光指示剂的亚硝酸根传感器

更新时间：2026-09-14

- 咔唑腙为荧光指示剂的亚硝酸根传感器
- 咔唑腙为荧光指示剂的亚硝酸根传感器
- Issue 1, (2010)
- 作者机构：
  
  1. 中北大学理学院
  2. 山西省高平市环境监测站
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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焦晨旭, 焦东旭. 咔唑腙为荧光指示剂的亚硝酸根传感器[J]. 2010, (1).
DOI：

焦晨旭, 焦东旭. 咔唑腙为荧光指示剂的亚硝酸根传感器[J]. 2010, (1). DOI：

摘要

合成了一种共轭的咔唑二聚体荧光载体9-乙基-3-咔唑亚甲基-咔唑腙(ECCH)

用PVC包埋的方法可以将它固定在光纤传感器的表面

在溶液pH值为2.0时

亚硝酸根(NO2-)与过量的碘离子(I-)反应生成的碘三离子(I3-)能猝灭此ECCH光极膜的荧光.得到了可以检测NO2-的传感器

并讨论了此传感器的传感机理.传感器具有较好的稳定性、重现性和选择性

使用寿命长等优点.NO2-测定的线性范围为1.0×10-6

.0×10-4mol.L-1;检出限为4.0×10-7mol.L-1.将传感器用于水样中NO-2的直接测定

回收率在96.0%~103.6%.

Abstract

A fluorescence carrier carbazole derivative 9-ethyl3-carbazylidene carbazole hydrazone(ECCH) with conjugated two carbazole ring has been synthesized.It can be fixed on the surface of optical fibre sensor to prepare a fluorescent sensor by PVC embedding method.When the solution pH value is 2.0

the reaction between nitrite(NO-2) and superfluous I-to form I3 which can quench the fluorescence of carbazole derivative and use in the sensor for the determination of NO-2.The quenching mechanism is discussed.The sensor shows sufficient repeatability

selectivity

operational lifetime.NO2 can be determined in the range from 1.0×10-6 to 1.0×10-4 mol·L-1 with a detection limit of 4.0×10-7 mol·L-1 at pH of 2.0.The recovery for the determination of ornidazole in water samples was ranging in 96.0%~103.6%

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