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Combined device of solid-phase micro-extraction and electrochemical sensor and single chip microcomputer

A sensor and electrochemical technology, which is applied in the field of solid-phase microextraction, electrochemical sensors and single-chip microcomputer combined devices, can solve the problems of easy interference and short working life of electrochemical sensors, and achieves low cost, high speed, and shortened analysis. effect of time

Inactive Publication Date: 2014-06-11
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the combination of solid-phase microextraction-electrochemical sensor-single-chip microcomputer technology is expected to overcome the shortcomings of electrochemical sensor detection, such as susceptibility to interference and short working life.

Method used

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  • Combined device of solid-phase micro-extraction and electrochemical sensor and single chip microcomputer
  • Combined device of solid-phase micro-extraction and electrochemical sensor and single chip microcomputer
  • Combined device of solid-phase micro-extraction and electrochemical sensor and single chip microcomputer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Gas phase sample extraction-detection process

[0035] As shown in accompanying drawing 3, during gas phase sample detection, gas sample is first sucked into gas storage chamber 15 by gas pump 14, then enters solid phase microextraction chamber 17 by quantitative autosampler 16, and gas sample is passed through solid phase micro The extraction head integration plate 19, the extracted gas is discharged through the air pump 18. According to the signal sent by the gas sensor, the CPU4 makes an instruction for the desorption liquid adder 22 to work to perform the desorption work. The desorption liquid is stored in the liquid storage chamber 21 , and the liquid storage chamber 21 is connected with the desorption liquid adder 22 . After the desorption is completed, the desorbed sample enters the electrochemical sensor detection tank 24 through the desorption liquid collection tank 23 for detection. After the CPU4 processes the sensor detection signal, the result i...

Embodiment 2

[0039] Example 2 Liquid Phase Sample Extraction-Detection Process

[0040] As shown in Figure 12, when the liquid phase sample is tested, the liquid phase sample enters the liquid storage chamber 43 from the sample inlet 42, and then flows into the solid phase microextraction chamber 45 through the liquid sample conduit 44. After the extraction is completed, the liquid sample is discharged through the liquid sample outlet 50 . The desorption liquid is added into the desorption liquid storage chamber 48 from the desorption liquid addition port 47 . There is a manual switch 52 at the bottom of the waste liquid recovery tank 46 .

[0041] As shown in Figure 13, the liquid storage chamber 43 is provided with a stirrer 41, which is located at the upper left of the solid phase microextraction chamber 45 and communicates with the solid phase microextraction chamber 45 through a liquid sample conduit 44. The desorption liquid adder 49, the solid phase microextraction chamber 45,...

Embodiment 3

[0042] Example 3 Solid-phase sample extraction-detection process

[0043] As shown in accompanying drawing 14, when the volatile component in the solid-phase sample is detected, the solid-phase sample is put into the volatilization chamber 62 from the right side port 61, after closing the valve, after connecting the solid-phase sample detection switch, the volatile component Volatile when heated. The volatile components enter the solid phase microextraction chamber 58 after being condensed by the condenser pipe 55 . The desorption liquid is added into the desorption liquid storage chamber 56 from the desorption liquid addition port 54 . After the extraction was completed, the CPU4 gave an instruction, and the desorption liquid adder 57 started to work. The extracted liquid is discharged through the liquid sample outlet 63 . The volatilization chamber 62 is located at the upper right of the SPME chamber 58 and has a heating resistance wire 67 at the bottom. The condensation...

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Abstract

The invention belongs to the field of environmental analysis and analytical chemistry and relates to a combined device of a solid-phase micro-extraction and electrochemical sensor and a single chip microcomputer, and the combined device comprises a gas-phase sample extraction detecting box, a liquid-phase sample extraction detecting box, a solid-phase sample extraction detecting box, an information processing control center, a selection keyboard, a display, an audible and visual alarm, a safety indicator lamp, an external power supply slot, a power supply and the like. With the assistance of a single chip microcomputer technology, the combined device has the advantages of automatic data acquisition and data processing, accuracy, fastness and capability of finishing online monitoring and detection. According to the invention, a solid-phase micro-extraction head integrated board and the electrochemical sensor are provided with fixed mounting grooves, so that the detachment and the installation are convenient; and meanwhile, a CPU (central processing unit) is internally provided with a data processing program of each component to be detected, so that the defects that the electrochemical sensor is easily interfered in the detection process, and the like are overcome. According to the invention, a plurality of the components to be detected in samples of various states can be detected, so that the combined device is widely applied to the fields of environment, foods, medicines, biology and the like.

Description

technical field [0001] The invention relates to a combined use device of solid-phase microextraction, electrochemical sensor and single-chip microcomputer. The device can realize the separation, enrichment and online monitoring of trace organic matter in complex samples such as environment, food, medicine and biology, and belongs to the field of environmental analysis and analytical chemistry. Background technique [0002] With the wide application of industrial products, the prevention of environmental emergency accidents, the monitoring of food safety, the detection of medical and health care and other issues are increasingly placed in front of governments at all levels. How to monitor and track toxic and harmful substances before the accident, detect the environment and personnel residues after the accident, and scientifically and reasonably guide the on-site and surrounding personnel to carry out effective personal protection, this is also the most basic use of detection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
Inventor 谢宇赵杰
Owner STATE GRID CORP OF CHINA
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