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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >An Investigation on Design and Characterization of a Highly Selective LED Optical Sensor for Copper Ions in Aqueous Solutions
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An Investigation on Design and Characterization of a Highly Selective LED Optical Sensor for Copper Ions in Aqueous Solutions

机译：水溶液中铜离子高选择性LED光学传感器的设计与表征研究

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摘要

The optical characteristics of copper ion detection, such as the photometric absorbance of specific wavelengths, exhibit significant intensity change upon incident light into the aqueous solutions with different concentrations of metal ions due to the electron transition in the orbit. In this study, we developed a low-cost, small-size and fast-response photoelectric sensing prototype as an optic sensor for copper (Cu) ions detection by utilizing the principle of optical absorption. We quantified the change of optical absorbance from infra-red (IR) light emitting diodes (LEDs) upon different concentrations of copper ions and the transmitted optical signals were transferred to the corresponding output voltage through a phototransistor and circuit integrated in the photoelectric sensing system. The optic sensor for copper (Cu) ions demonstrated not only excellent specificity with other metal ions such as cadmium (Cd), nickel (Ni), iron (Fe) and chloride (Cl) ions in the same aqueous solution but also satisfactory linearity and reproducibility. The sensitivity of the preliminary sensing system for copper ions was 29 mV/ppm from 0 to 1000 ppm. In addition, significant ion-selective characteristics and anti-interference capability were also observed in the experiments by the proposed approach.
机译：铜离子检测的光学特性，例如特定波长的光度吸光度，在轨道中具有不同浓度金属离子的含水溶液时表现出显着的强度变化。在这项研究中，我们通过利用光学吸收原理，开发了一种用于铜（Cu）离子检测的光学传感器的低成本，小尺寸和快速响应的光电传感原型。我们量化了在不同浓度的铜离子时从红外线（IR）发光二极管（LED）的光学吸光度的变化，并且通过集成在光电传感系统中的光电晶体管和电路将透射光信号传递到相应的输出电压。用于铜（Cu）离子的光学传感器不仅具有与相同水溶液中的其他金属离子（如镉（Cd），镍（Ni），铁（Fe）和氯化镍（Cl）离子等优异的特异性，而且令人满意的线性和再现性。铜离子的初步感测系统的灵敏度为0至1000ppm的29mV / ppm。此外，还通过所提出的方法在实验中观察到显着的离子选择性特征和抗干扰能力。

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