Measuring cell for light-addressable potentiometric sensor

Abstract

The invention discloses a measuring cell for a light-addressable potentiometric sensor, comprising square arrays (6), circular holes (7) and square arrays (8), wherein the square arrays (6) are arranged with equal spacing on the top cover of the measuring cell (1); the square arrays (8) are arranged with equal spacing at the bottom of the measuring cell and juxtapose with and correspond to the square arrays on the top cover. As silicon chips are coated with different sensitive membranes, the measuring cell provided by the invention can be used to carry out multi-parameters and multi-point measurements on solutions, and also can be suitable for the concentration distribution measurement of a same solution in different measurement domains; the whole structure of the measuring cell is a standard cuboid and is simpler than that of the step counter method by the control of a stepping motor; the measuring cell is easy to integrate and operate with accurate addressing. The invention has solved the disadvantages of complicated peripheral control and manufacturing process, inconvenient operation and impossibility of accurate addressing in present measuring cells for light-addressable potentiometric sensors.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to a measuring pool for an optical addressing potential sensor. Background technique [0002] Light Addressable Potentionmetric Sensor (LAPS) is a biochemical sensor using the principle of semiconductor field effect, which has important research and application value in biochemistry, medicine and other fields. Because of its characteristics of multi-parameter measurement, small size, good stability, easy packaging, high sensitivity, and short detection time, it has attracted extensive research and application. Optically addressable potential sensors can be classified into a MIS (metal / insulator / semiconductor) structure and an EIS (electrolyte solution / insulator / semiconductor) structure. The measuring cell is used to realize the EIS structure of the light-addressable potentiometric sensor, which is used to detect the concentration of specific ions in the solution. By applying a b...

AI Technical Summary

Problems solved by technology

[0003] The development of the sensitive film of the optical addressable potential sensor is a hot spot at present, but there are few studies on the structure of the measurement cell of the optical addressable potential sensor

The existing optical addressable potential sensor measuring cell has a complex design structure, cumbersome control, and huge peripheral instruments, which is not conducive to system integration and productization

In the article "Research on Optical Addressing Potential Sensor Measurement System" in the 12th issue of "Instrument Technology and Sensors" in 2003, Niu Wencheng and others proposed to use a stepper motor as the power to drive the precision screw to rotate through the toothed belt to control the LED. The position change comes from optical addressing. This method is not accurate enough, and the product is bulky and inconvenient to operate, which increases the workload.

In the article "Application of Light-addressable Potential Sensors in Organophosphorus Detection" in the 10th issue of "Sensor Technology" in 2003, Xu Lei and others proposed the structure of integrating the LED array inside the test system. The manufacturing process of the sensor requires high requirements, and the replacement of the sensitive film and LED is very inconvenient

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