A portable and autonomous multichannel fluorescence detector for on-line and in situ explosive detection in aqueous phase.
A portable and autonomous multichannel fluorescence detector for on-line and in situ explosive detection in aqueous phase.
复制标题
DOI：
10.1039/c2lc40804j
复制
发表时间：
2012-10
期刊：
影响因子：
6.1
通讯作者：
Yunhong Xin;Qi Wang;Taihong Liu;Lingling Wang;Jia Li;Yu Fang
中科院分区：
文献类型：
--
作者：
Yunhong Xin;Qi Wang;Taihong Liu;Lingling Wang;Jia Li;Yu Fang
研制了一种用于检测水相中硝基芳烃类炸药的多通道荧光检测器，该检测器由五通道样品传感器单元、测控单元、单片机和通信单元组成。所开发的检测器的特性主要嵌入在传感器单元中，并且每个传感器由荧光感测膜、发光二极管（LED）、多像素光子计数器（MPPC）和具有特殊带通光学滤波器的光学模块组成。由于敏感膜的高灵敏度、LED和MPPC的小尺寸和低成本，所开发的检测器不仅具有更好的检测性能和小尺寸，而且具有非常低的成本-它是由昂贵的大功率灯和光电倍增管制成的装置的替代品。所涵盖的五个传感器的波长从高紫外线延伸到可见光谱370-640纳米，因此它具有探测水相中各种爆炸物和其他危险材料的潜力。检测器的附加功能是其经由无线网络起作用的能力，通过无线网络，由检测器记录的数据可以被发送到主计算机，并且同时指令可以从主计算机发送到检测器。利用上位机强大的计算能力，利用经典的主成分分析（PCA）算法，实现了对待测物的有效分类。以NB、PA、TNT和DNT为被测物，甲苯、苯、甲醇和乙醇（浓度范围为10 ~ 60 μM）为衍生物，对该检测器进行了测试和评价。实验结果表明，该检测器对四种硝基芳烃的检测具有较高的灵敏度和选择性。
A multichannel fluorescence detector used to detect nitroaromatic explosives in aqueous phase has been developed, which is composed of a five-channel sample-sensor unit, a measurement and control unit, a microcontroller, and a communication unit. The characteristics of the detector as developed are mainly embedded in the sensor unit, and each sensor consists of a fluorescent sensing film, a light emitting diode (LED), a multi-pixel photon counter (MPPC), and an optical module with special bandpass optical filters. Due to the high sensitivity of the sensing film, the small size and low cost of LED and MPPC, the developed detector not only has a better detecting performance and small size, but also has a very low cost - it is an alternative to the device made with an expensive high power lamp and photomultiplier tube. The wavelengths of the five sensors covered extend from the upper UV through the visible spectrum, 370-640 nm, and thereby it possesses the potential to detect a variety of explosives and other hazardous materials in aqueous phase. An additional function of the detector is its ability to function via a wireless network, by which the data recorded by the detector can be sent to the host computer, and at the same time the instructions can be sent to the detector from the host computer. By means of the powerful computing ability of the host computer, and utilizing the classical principal component analysis (PCA) algorithm, effective classification of the analytes is achieved. Furthermore, the detector has been tested and evaluated using NB, PA, TNT and DNT as the analytes, and toluene, benzene, methanol and ethanol as interferent compounds (concentration various from 10 and 60 μM). It has been shown that the detector can detect the four nitroaromatics with high sensitivity and selectivity.