排序方式: 共有6条查询结果,搜索用时 15 毫秒
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主要研究对象为基于离子选择性中性载体的无机离子化学传感器,采用以吸光度为主要测量信号的分光光度法为主要分析方法。依据该传感器的特征,可使分析光束与被测溶液分开,甚至对不透明的液体作分光光度分析。为此,在离子选择性中性载体PVC膜的响应特征基础上设计并研制一种新型结构的光吸收池,应用前景广阔。 相似文献
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光导纤维氨气敏荧光传感器的研制和应用 总被引:1,自引:0,他引:1
以大环冠醚为铵离子中性载体,吖啶橙为荧光PH指示剂,二者结合于增塑的PVC膜中,样品氨浓度变化直接引起膜的荧光强度变化。基于该原理研制成不需内电解质溶液的光导纤维氨气敏荧光传感器。用以测定生活污水的氨氮,精密度实验的平均变异系数为0.9-1.3%;回收率为95.4%-105.6%。 相似文献
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A novel fully distributed fibre optic humidity sensor technology suitable for spatially continuous monitoring of water ingress under pipeline insulation is reported. Results from controlled water ingress tests are presented, where the fibre cables were mounted on pipes insulated with air gap cell glass and aerogel insulation. The experiments revealed that the fibre optic sensor responded to water ingress equivalent to <10 ml/metre pipe, under air gap cell glass insulation. The fibre optic measurements were validated by comparison with conventional calibrated point humidity sensors. A compensation methodology using a reference optical fibre was used to effectively reduce the effect of temperature variations on the measurements. The ability of the sensor to monitor the spatial evolution of water ingress with cm scale resolution was demonstrated, as was the feasibility to make accurate water ingress measurement over 2 km fibre lengths. The technology could be used to assist targeted inspection campaigns aimed at minimizing the risk of Corrosion Under Insulation (CUI). 相似文献
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用于1,3-二硝基苯快速检测的免疫传感器研究 总被引:1,自引:1,他引:0
利用倏逝波全光纤生物传感平台,发展了一种用于1,3-二硝基苯快速检测的免疫传感器,其检测限可达0.054 mg·L-1,检测时间少于10 min.采用先将小分子污染物与惰性蛋白OVA结合制备成复合物,然后将该复合物通过双功能试剂连接到硅烷化后的光纤探头表面作为生物识别元件,使得传感器具有良好的鲁棒性和再生性能,可以重复使用上百次,而且没有明显的活性损失.实际水样的加标回收实验表明,所有样品的加标回收率在80%~120%之间,相对标准偏差为4.5%~10.0%,具有很好的精密度和准确性,受环境基质的影响较小,因此,该免疫传感器能够用于实际水样中1,3-二硝基苯的快速检测. 相似文献
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