Analytical method of portable expandable test paper and equipment thereof

An analysis method and technology of analysis equipment, which are applied in material analysis by observing the effect of chemical indicators, analysis by chemical reaction of materials, color/spectral characteristic measurement, etc. Problems such as single nitrate test paper, test strip judgment error, etc., to achieve the effects of low cost, easy operation and accurate results

Inactive Publication Date: 2009-12-30
BEIJING ZHIYUNDA TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, different people have different sensitivities to color changes, and there will be errors in judging the color changes of the test strips, resulting in differences in the test results of each person.
At present, there are only urine analyzers for medical testing on the market, which can continuously detect multiple reagent strips and obtain 8-12 urine indicators. However, analyzers for a variety of food safety rapid detection test strips have not yet appeared. A single nitrate test paper detector

Method used

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  • Analytical method of portable expandable test paper and equipment thereof
  • Analytical method of portable expandable test paper and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Such as figure 1 As shown, a portable and expandable test paper analysis instrument is mainly composed of an optical system (1), an amplifier (2), an A / D converter (3), a microcomputer system (4) and an additional circuit (5). The light emitted by the light source irradiates the reaction area of ​​the test strip, and the light value of the reflected light of the test paper block is measured by the detector, and the light value is collected by the photoelectric conversion system, and the reflectance is calculated by the microcomputer, converted into concentration, and The results are displayed on the display screen, and can also be connected to a computer through a USB interface for data processing and statistical analysis.

Embodiment 2

[0014] Such as figure 2 As shown, the entire system flow of a portable and expandable test paper analysis instrument can be divided into the following modules: light source (101), sample chamber (102), detector (103, 104), amplifier (2), A / D conversion Device (3), microcomputer system (4) and additional circuit (5). The detection of test strips is the core of the whole system. The user selects the detection item to measure through the keyboard (403), the instrument selects the corresponding detection wavelength according to different test papers, the detector completes the measurement control and data collection of the test paper, and the processor is responsible for the calculation, display, storage and query of the measurement results And tasks such as data exchange with the PC.

[0015] The test strip after adding the detection reagent is put into the detection part of the instrument, and the detection item is selected by touching the color liquid crystal screen (402) an...

Embodiment 3

[0017] Use this device for nitrite detection. Firstly, put the test strip with the test sample into the sample compartment, select the test item through the keyboard, and the instrument will automatically determine to use a blue light source for detection according to the selected item, and obtain the reflectance of the test paper, and compare it with the reflectance built in the instrument —— Concentration curves are compared to obtain the concentration of the tested sample.

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Abstract

The invention relates to analytical equipment of portable expandable test paper. Light emitted from a light source is irradiated on the reaction region of a test strip; the light values of the reflected light of the test strip are tested through a detector; the light values is collected through a photo-translating system; reflectivity is calculated through a micro computer and converted into concentration; further a testing result is obtained. The equipment can carry out real-time and on-site analysis on rapid test paper such as pesticide residue, nitrite, formaldehyde, industrial alkali and urea in milk and the like, has the advantages of accurate testing result, convenient carrying, practicality, low cost and good effect, is particularly suitable for the on-site law enforcement of food safety test institutions at all levels, can also be widely applied to the individual and family food safety self test, and can also be applied to the on-site test in fruit, vegetable and tea production bases and in farm product wholesale and sales markets, and the rapid safety test before fruit and vegetable processing in restaurants, dining halls and family, etc.

Description

technical field [0001] The invention relates to a portable and expandable test paper analysis method and its equipment, which are mainly used for the interpretation of food safety rapid detection test paper, such as pesticide residues, nitrite, formaldehyde, industrial alkali, urea in milk, etc., belonging to food safety Testing equipment technical field. Background technique [0002] With the development of science and technology, the extensive use of chemical pesticides and the increase of food and water pollution channels, the global food safety situation is becoming more and more severe, and the safety inspection of food and water quality is becoming more and more important. The attention of governments at all levels and the general public. [0003] The current food safety testing work in my country is mainly undertaken by epidemic prevention stations, disease control centers, and inspection and quarantine bureaus. These national units are well-equipped and have good la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31
Inventor 桑华春刘丰权傅晓春于宽
Owner BEIJING ZHIYUNDA TECH CO LTD
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