Photocoupler ion detection device and method based on nanocup array device
A detection device and optical detection technology, applied in the field of ion detection, can solve problems such as high sensitivity, and achieve the effects of high sensitivity, lower detection cost, and simplified detection process
Active Publication Date: 2016-01-20
ZHEJIANG UNIV
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It has the characteristics of real-time, fast and non-contact detection, but it is affected by the optical path and sample turbidity in the detection and requires additional labeling molecules to achieve selective response to different ions and high sensitivity
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[0031] A photoelectric coupling ion detection method based on a nanocup array device, comprising the steps of:
[0032] 1. Use 1g / L heavy metal standard stock solution lead sulfate (PbSO 4 , purchased from Sigma Company) diluted to prepare concentration gradients of 20 μg / L, 40 μg / L, 60 μg / L, 80 μg / L and 100 μg / L heavy metal Pb 2+ Each standard sample solution is 100mL. At the same time, Pb with a concentration of 50 μg / L was prepared 2+ The solution was used as the solution of unknown concentration to be tested. Dilute the bottom solution to 2mmol / LK 3 [Fe(CN) 6 ]+1mol / L KCl solution. Reagents are stored in polytetrafluoroethylene bottles. All utensils need to be soaked in 1M dilute nitric acid for more than 48 hours, rinsed with pure water, and dried before use.
[0033] 2. Add heavy metal Pb with a concentration of 100 μg / L in the electrochemical reaction chamber 9 2+ Standard sample solution 5mL, with the nanocup array sensing device 93 as the working electrode, the...
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The invention discloses a photoelectrical combined ion detection device and method based on a nano cup array device. A nano cup array sensor is adopted for the device to act as a working electrode which forms a three-electrode system together with a reference electrode and a counter electrode, and the optical transmission of the device is detected in electrochemical reaction; nano cup structures with nano-scale diameters are regularly distributed on the surface of a nano cup array sensor, and nano gold particles are sputtered and deposited on the nano cup array sensor. The method disclosed by the invention comprises the following steps: firstly, preparing a to-be-detected ion standard sample solution, and establishing a standard concentration-transmission peak displacement curve, thereby obtaining a standard response curve formula; and then detecting the transmission of the device caused by an ion solution of unknown concentration under electrochemical reaction, and substituting the obtained standard response curve formula, thereby obtaining the solution ion concentration. The method for ion detection, which is disclosed by the invention, overcomes the disadvantages of an existing ion optical detection method, has the advantages of good selectivity, difficulty of being affected by samples and the like without additional detection label substances, simplifies the detection process, and reduces the detection cost.
Description
technical field [0001] The invention relates to an ion detection technology based on a nanocup array device, in particular to a photoelectric coupling ion detection device and method based on a nanocup array device. Background technique [0002] In nature, chemical substances often exist in the form of ions, which have a huge impact on human production and life. In the field of medicine, DNA and some biological enzymes in the human body exhibit anionic properties; in terms of the environment, heavy metal ions such as mercury, lead, and cadmium in water are highly toxic and threaten human health. Therefore, the detection of ions has important practical significance. Optical detection technology is a detection method for qualitative and quantitative analysis of substances by using various optical properties of substances. Among them, devices such as nanocup arrays and nanoparticles use the effect of plasmon resonance induced by nanoscale structures on optical transmission fo...
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IPC IPC(8): G01N21/552
Inventor 刘清君张迪鸣王平卢妍利张倩
Owner ZHEJIANG UNIV