Anionic surfactant sensor based on a hetero-core structured optical fiber
Anionic surfactant sensor based on a hetero-core structured optical fiber
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基于异核结构光纤的阴离子表面活性剂传感器
DOI：
10.1007/s00604-009-0139-1
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Kazuhiro Watanabe
中科院分区：
文献类型：
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作者：
A. Seki;H. Sasaki;Kazuhiro Watanabe
描述了一种简单的光纤分光光度测量阴离子表面活性剂的方法。该探头由异芯结构光纤制成，该光纤由多模光纤和插入多模光纤中的短单模光纤组成。传感器表面采用辛基三甲氧基硅烷处理，通过纤维表面辛基与表面活性剂疏水基团之间的疏水相互作用吸附表面活性剂-亚甲基蓝复合物。由于包层处产生的倏逝波相互作用，吸附在传感器表面上的亚甲基蓝阴离子表面活性剂复合物导致传播光损失。光纤的传播损耗光谱在 610 nm 附近出现峰值。吸光度随着表面活性剂浓度的增加而增加，在浓度为 30μm 时达到上限。响应时间在30分钟以内。
A simple method of fiber optic spectrophotometric measurement for anionic surfactant is described. The probe was fabricated from hetero-core structured fiber optic that consisted of multi mode fibers and a short length of single mode fiber which was inserted in the multi mode fibers. The sensor surface was treated with octyltrimethoxysilane to adsorb the surfactant-methylene blue complex via hydrophobic interaction between the octyl group on the fiber surface and the hydrophobic group of the surfactant. Methylene blue—anionic surfactant complex adsorbed on the sensor surface caused propagating light loss because of evanescent wave interaction that was generated at the cladding. The propagating loss spectrum of the fiber showed a peak at around 610 nm. Absorbance increases with the concentration of the surfactant to reach an upper level at a concentration of 30 μm. The response time is within 30 min.