CN104062245A - Rapid detector for content of heavy metals in food - Google Patents
Rapid detector for content of heavy metals in food Download PDFInfo
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- CN104062245A CN104062245A CN201410244132.9A CN201410244132A CN104062245A CN 104062245 A CN104062245 A CN 104062245A CN 201410244132 A CN201410244132 A CN 201410244132A CN 104062245 A CN104062245 A CN 104062245A
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Abstract
The invention relates to a rapid detector for content for heavy metals in food. The rapid detector comprises an irradiating region, a detecting region and a receiving region, wherein the radiating region comprises a high-brightness LED (light-emitting diode), a light coupler, a quartz optical fiber and a collimator. The detecting region comprises a detecting channel connected with the corresponding position of the radiating region, wherein a Z-shaped flow cell is arranged in the detecting channel and is connected with a to-be-detected liquid pipeline and the quartz optical fiber. The receiving region comprises a spectrum receiving analyzer arranged at the other end of the detecting channel; the high-brightness LED, the light coupler, the quartz optical fiber, the collimator, the Z-shaped flow cell and the spectrum receiving analyzer are horizontal and the centers of the high-brightness LED, the light coupler, the quartz optical fiber, the collimator, the Z-shaped flow cell and the spectrum receiving analyzer are on the same straight line. The radiating region adopts quartz optical fiber and is good in light sensitivity, and the detecting channel adopts the Z-shaped flow cell, and has the advantages of being better in repeatability, higher in degree of automation, lower in sample capacity, smaller in error, and higher in flexibility in comparison with those of the detecting channel adopting a cuvette.
Description
Technical field
Patent of the present invention relates to a kind of detecting instrument, is specifically related to a kind of Portable heavy metal detector for the heavy metal pollution of fast detecting food processing chain.
Background technology
Heavy metal can accumulate and do in object residual in soil, mainly finally threatens human health by contaminated food products, potable water and air.Heavy metal mostly can not be degraded by biology in environment, contrary but can thousands of hundred times of ground enrichments under the biological magnification of food chain, enter people's body accumulation by food chain, form the potential hazard to human body.Heavy metal pollution mainly causes the chronic injury of body after food chain amplification enters human body with food, the heavy metal that enters human body will just can demonstrate toxicity through the accumulation of long period, therefore be often difficult for being discovered in early days and just cause enough attention before toxicity outbreak, thereby more having increased the weight of its harmfulness.
Food heavy metal pollution problem has caused global great attention and further investigation; heavy metal pollution in food processing chain is monitored and analyzed and researched, have important practical significance for evaluating food quality, to protect mankind health and maintaining Sustainable Socioeconomic Development.In order to promote food service industry sound development, reduce heavy metal and enter people's human body from food chain, set up the technology that in a kind of quick, convenient, simple, reliable environment, content of beary metal detects most important.
Conventional heavy metal detection technique now, as technology such as atomic absorption spectrography (AAS), inductively coupled plasma emission spectrography and dynamic phosphorescence analyses, all need expensive detecting instrument and complicated pre-treatment as high temperature, high pressure, strong acid digestion etc., and because the variation of Instrument measuring condition is closely related with testing result, need very professional analytical test personnel operation.Therefore, only have the centralab of specialty analysis mechanism for testing and research institution just to possess test condition, and the cycle of detecting sample is relatively long, testing process complexity, testing cost is higher, is difficult to conform and spot check, the manufacturing enterprise of market product checks oneself and product is imported and exported the requirement speeding passage through customs.
Current, immunoassay technology has been widely used in the environmental pollution of toxin, pesticide, explosive etc. and the detection of danger.Compared with other detection systems, immunologic detection method has advantages of fast, cheap, easy, sensitive and special, can portablely carry out Site Detection.The immunology detection of heavy metal is a kind of novel heavy metal detection method, compared with traditional detection method, have save time, the advantage such as laborsaving, expense is cheap, be easy to carry, easy operating.Can be used for field quick detection and the conventional sense of heavy metal contaminants, be the quality supervision of monitoring heavy metal pollution, pollution control, food in food processing process, and the optimum determining method of science data and fast processing sample, Fast Measurement is provided.
Summary of the invention
The deficiency existing for prior art, the object of the invention is to based on immune sensing technology provide a kind of simple in structure, detection efficiency is high, sensing range is wide, reagent consumption is little and the content of heavy metal in foods fast detector that can portablely carry.
In order to address the above problem, the technical scheme that the present invention takes is: a kind of content of heavy metal in foods fast detector, comprise irradiated region, detection zone and reception area, and described irradiated region comprises by high-brightness LED, light coupling mechanism, silica fibre, collimating apparatus.Detection zone is included in the sense channel being connected with relevant position, irradiated region, and Z-shaped flow cell is set in sense channel, and described Z-shaped flow cell connects liquid pipeline to be detected and silica fibre.Reception area comprises the spectrum receiving and analyzing device that is arranged on the sense channel other end, and described high-brightness LED, light coupling mechanism, silica fibre, collimating apparatus, Z-shaped flow cell and spectrum receiving and analyzing device level and center are point-blank.
Above-mentioned heavy metal fast detector, described light coupling mechanism is by the diverging light polymerization of light source.
Above-mentioned heavy metal fast detector, described Z-shaped circulation adopts the quartz window sheet of UV rank, anticorrosive, effectively to see through 210-2000nm wavelength light.
Above-mentioned heavy metal fast detector, Z-shaped flow cell adopts Z-shaped stream line, and solution to be detected flows therein, and detection limit is little, mix.
Above-mentioned heavy metal fast detector, described spectrum receiving and analyzing device is made up of Flat field concave grating and CCD.
The advantage of the content of heavy metal in foods fast detector the present invention relates to is: adopt high-brightness LED to enter optical fiber as light source, process fiber coupler, and just enter sense channel by collimating apparatus, replace slit, light path volume in traditional beam splitting system greatly to reduce, beam divergence is little, light beam good linearity, light utilization efficiency are high; Sense channel adopts Z-shaped flow cell, and reagent consumption is little, reproducible, is applicable to the liquid sample of robotization, can eliminate measuring error that manual solution-treated produces, small and exquisite, is applicable to portable set.Spectrum receiving and analyzing adopts flat field grating, focus lamp and CCD, avoid adopting mechanical hook-up dispersion element is shifted and rotates control, thereby measuring speed is fast, efficiency is high, multiple dot array CCD realizes the output of full spectrum absorbance, resolution is high, and image data amount is large, final curve plotting precision is high.Whole instrument volume is little, and portable performance is high.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further details.
As shown in Figure 1, a kind of content of heavy metal in foods fast detector, comprises irradiated region, detection zone and reception area.Described irradiated region comprises high-brightness LED 1, optical filter 2, fiber coupler 3 and silica fibre 4.Detection zone is mainly made up of Z-shaped flow cell 5.Reception area comprises plane grating 9, focus lamp 10 and multiple dot array CCD11.The fiber coupler of chatting 3 by the diverging light polymerization of light source, described Z-shaped flow cell 5 adopts the quartz window sheet of UV rank, anticorrosive, effectively to see through 210-2000nm wavelength light, and described Z-shaped flow cell 5 adopts Z-shaped stream line, solution to be detected flows therein, and detection limit is little, mix.Described spectrum receiving and analyzing device is made up of plane grating 9, focus lamp 10 and multiple dot array CCD11, realizes the output of full spectrum absorbance.
When specific works, first by heavy metal-sequestrant compound of the heavy metal ion in sample and excessive sequestrant formation solubility, then by itself and the antigen binding site that is coated on the heavy metal-sequestrant-protein complex competition monoclonal antibody in ELISA Plate, add ELIAS secondary antibody and substrate colour developing, then by high precision pump, solution is drawn into the entrance 6 of Z-shaped flow cell, solution flows between entrance 6 and outlet 7, monochromatic light in silica fibre 4 projects solution through flow cell 5, light is through 8, direct projection is to plane grating 9, be mapped on multiple dot array CCD11 through focus lamp 10, CCD11 receives the sample solution spectral information of transmission through immune chelating, spectral information is gathered, through microprocessor and software processing, the typical curve built-in with program contrasts, can draw the concentration of heavy metal ion of sample.
Content described in the invention process is not limitation of the present invention, the present invention be also not limited to above-mentioned for example, protection scope of the present invention is also and conceive the equivalent technologies means that can expect according to the present invention with those skilled in the art.
Claims (8)
1. a content of heavy metal in foods fast detector, is characterized in that: be made up of irradiated region, detection zone and reception area.
2. described in, irradiated region comprises by high-brightness LED, light coupling mechanism, silica fibre, collimating apparatus.
3. detection zone is included in the sense channel being connected with relevant position, irradiated region, and Z-shaped flow cell is set in sense channel, and described Z-shaped flow cell connects liquid pipeline to be detected and silica fibre.
4. reception area comprises the spectrum receiving and analyzing device that is arranged on the sense channel other end, and described high-brightness LED, light coupling mechanism, silica fibre, collimating apparatus, Z-shaped flow cell and spectrum receiving and analyzing device level and center are point-blank.
5. content of heavy metal in foods fast detector according to claim 1, is characterized in that: the fiber coupler of chatting by the diverging light polymerization of light source.
6. content of heavy metal in foods fast detector according to claim 1, is characterized in that: described Z-shaped flow cell adopts the quartz window sheet of UV rank, anticorrosive, effectively to see through 210-2000nm wavelength light.
7. content of heavy metal in foods fast detector according to claim 3, is characterized in that: described Z-shaped flow cell adopts Z-shaped stream line, and solution to be detected flows therein, and detection limit is little, mix.
8. tenor fast detector in food according to claim 1, is characterized in that: described spectrum receiving and analyzing device is made up of plane grating, focus lamp and multiple dot array CCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244132.9A CN104062245A (en) | 2014-06-04 | 2014-06-04 | Rapid detector for content of heavy metals in food |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244132.9A CN104062245A (en) | 2014-06-04 | 2014-06-04 | Rapid detector for content of heavy metals in food |
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| CN104062245A true CN104062245A (en) | 2014-09-24 |
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| CN201410244132.9A Pending CN104062245A (en) | 2014-06-04 | 2014-06-04 | Rapid detector for content of heavy metals in food |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502293A (en) * | 2014-12-30 | 2015-04-08 | 中山大学 | Quick food security detection device based on cell phone platform |
| CN105866044A (en) * | 2016-06-23 | 2016-08-17 | 湖北出入境检验检疫局检验检疫技术中心 | Quick detector for microcystic toxins |
-
2014
- 2014-06-04 CN CN201410244132.9A patent/CN104062245A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502293A (en) * | 2014-12-30 | 2015-04-08 | 中山大学 | Quick food security detection device based on cell phone platform |
| CN105866044A (en) * | 2016-06-23 | 2016-08-17 | 湖北出入境检验检疫局检验检疫技术中心 | Quick detector for microcystic toxins |
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Application publication date: 20140924 |
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| WD01 | Invention patent application deemed withdrawn after publication |