CN203519554U - Hand-held type micro sensing device capable of quickly detecting food additives - Google Patents
Hand-held type micro sensing device capable of quickly detecting food additives Download PDFInfo
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- CN203519554U CN203519554U CN201320577555.3U CN201320577555U CN203519554U CN 203519554 U CN203519554 U CN 203519554U CN 201320577555 U CN201320577555 U CN 201320577555U CN 203519554 U CN203519554 U CN 203519554U
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Abstract
The utility model relates to an electrochemistry food safety detection device, in particular relates to a hand-held type micro sensing device capable of quickly detecting food additives. A base shell is covered with a biochip main board and a base cover plate can be divided into two parts, and sample dropping notches are formed in the middle position of the base shell; notch plates are arranged on the two sides of the base cover plate and fixed by fixation string needles; the biochip main board is provided with a first electrode and a second electrode; and moreover the first electrode and the second electrode comprise two access ports. The hand-held type micro sensing device solves the problems of the prior art that the detection operation of most of illegal food additives is complicated, and needs long detection time. The hand-held type micro sensing device is easy to prepare and has other characteristics of simple and convenient detection operation, high sensitivity, high specificity, and short response time. The micro flow mixer chip capable of quantitatively detecting the food additive can directly detect the content of the food additive.
Description
Technical field
The utility model relates to a kind of Electrochemical Detection food security device, specifically a kind of micro sensing equipment and instrument of hand-held fast detecting food additives.
Background technology
Food additives are for improving the qualities such as food color, and add chemical combination material or the natural materials in food for anticorrosion with needs processing technology.China's food additives have 23 classifications at present, more than 2000 kind, comprises acidity regulator, anticaking agent, defoamer, antioxidant, bleaching agent, leavening agent, colorant, color stabilizer, enzyme preparation, flavoring agent, nutrition fortifier, antiseptic, sweetener, thickening agent, spices etc.The public talks food additives look and becomes, and more reason is to have obscured the concept of illegal additive and food additives, and it is obviously inequitable the charge of some illegal additives being anchored on the head of food additives.The < < General Office of the State Council illegally adds behavior about severe strike food and conscientiously strengthens requiring standard food additives production and application in the notice > > of food additives supervision: forbid to use non-edible material from soybeans to produce formulated food adjuvant, must not buy sign lack of standardization, the not clear food additives of originating, the super scope of serious investigation, the behavior of the abuse such as the amount of transfiniting food additives, require to formulate and announce formulated food adjuvant universal safety standard and food additives sign standard before the end of the year in 2011 simultaneously.
Food security refers to that food is nontoxic, harmless, meets the nutritional requirement that should have, and health is not caused to any acute, subacute or chronic hazard.According to the definition of the World Health Organization (WHO), food security is " public health problem of poisonous and harmful substances to Health Impact in food ".Food security is also to inquire into guarantee food hygiene and edible safety in the processes such as food processing, storage, sale, reduces disease risk, takes precautions against interdisciplinary fields of food poisoning.Job operation, process and device used in Food Science and Engineering research food industry production, she is the design basis of food production process and equipment, relates to each subjects such as chemistry, physics, agronomy, biological chemistry, microbiology, chemical engineering, Biochemical Engineering, mechanical engineering, human nutrition and food hygiene, environmental improvement and engineering.An importance of Food Science and Engineering is introduce and use chemical engineering unit operation, and concurrent spread becomes food engineering unit operations, thereby promotes food industry to the future development of extensive, serialization and robotization.The same chemical engineering of development of Food Science and Engineering, bioengineering are closely related, and its developing direction is that new packing means and equipment improve Food Packaging technology, improve food preservation performance and shelf life; Improve boiling technology, aseptic packaging technology; Study rational energy saver to reduce the cost of frozen food; The optimization of food engineering unit operations, robotization and computer application.Although Food Science and Engineering are young technology-oriented disciplines, Dan Ta modern society becomes the outstanding feature of economic development, civilization degree raising already.Following development trend is to use for reference the development result of gene technology, develops that nutrition is more abundant, more delicious taste, more scientific food of shelf-life.
Therefore need in numerous food additives, filter out illegal adjuvant is the current important process for food security.
Summary of the invention
Whether the purpose of this utility model is to provide a kind of micro sensing equipment and instrument of hand-held fast detecting food additives, thereby realization detects the content of most illegal food additives, exceed standard or exist.
The utility model solves its above-mentioned technical matters and adopts following technical scheme: a kind of micro sensing equipment and instrument of hand-held fast detecting food additives, it is mainly configured with: pedestal drain pan, biochip mainboard, sample splash into notch, pedestal cover plate, frid, fixing string pin, the first electrode, the second electrode, the first storage tank, the second storage tank, the 3rd storage tank, converge storage tank, microchannel, inserted sheet, plectrum, plectrum groove, chip cover card, on described pedestal drain pan, are covered with biochip mainboard; Pedestal cover plate can dimidiation, and centre position has sample drop and enters notch; Pedestal cover plate both sides are frid, and frid is fixed by fixing string pin;
Described biochip mainboard is provided with the first electrode, the second electrode; And there are the first electrode, the second electrode to have two access interface;
Between the first described electrode and the second electrode, by microchannel, connect;
The first described storage tank, the second storage tank, the 3rd storage tank are located on microchannel;
The described storage tank that converges is communicated with the first storage tank, the second storage tank, the 3rd storage tank;
Chip cover card one end is provided with inserted sheet, and biochip mainboard inserts in chip cover card by plectrum groove.
Above-mentioned sample splashes into the position of notch and converges storage tank and matches.
The beneficial effects of the utility model: solved the illegal food additives of major part are detected to complicated operation, and need the long problem of spended time, the microfluid mixer chip that provide that a kind of easy preparation and test operation are simple and convenient, highly sensitive, high specificity, response time are short, can quantitatively detect food additives, has realized the direct-detection to food additives content.The utility model is of great significance at food industry tool.
Accompanying drawing explanation
Fig. 1 is the equipment base structural representation of the micro sensing equipment and instrument of a kind of hand-held fast detecting of the utility model food additives.
Fig. 2 is the structural representation of the micro sensing equipment and instrument biochip mainboard of a kind of hand-held fast detecting of the utility model food additives.
Fig. 3 is the structural representation of the micro sensing equipment and instrument chip cover card of a kind of hand-held fast detecting of the utility model food additives.
Figure 4 shows that the curve map of relation between the sample feed path height of sensor of embodiment 1 and response (ratio).
1-pedestal drain pan in figure, 2-biochip mainboard, 3-sample splashes into notch, 4-pedestal cover plate, 5-frid, the fixing string of 6-pin, 7-the first electrode, 8-the second electrode, 9-the first storage tank, 10-the second storage tank, 11-the 3rd storage tank, 12-converges storage tank, 13-microchannel, 14-inserted sheet, 15-plectrum, 16-plectrum groove, 17-chip cover card.
Embodiment
Below in conjunction with accompanying drawing 1-4, embodiment of the present utility model is made a detailed explanation.
Embodiment: a kind of micro sensing equipment and instrument of hand-held fast detecting food additives, it is mainly configured with: pedestal drain pan 1, biochip mainboard 2, sample splash into notch 3, pedestal cover plate 4, frid 5, fixing string pin 6, the first electrode 7, the second electrode 8, the first storage tank 9, the second storage tank 10, the 3rd storage tank 11, converge storage tank 12, microchannel 13, inserted sheet 14, plectrum 15, plectrum groove 16, chip cover card 17, on described pedestal drain pan 1, are covered with biochip mainboard 2; Pedestal cover plate 4 can dimidiation, and centre position has sample drop and enters notch 3; Pedestal cover plate 4 both sides are frid 5, and frid 5 is fixing by fixing string pin 6;
Described biochip mainboard 2 is provided with the first electrode 7, the second electrode 8; And there are the first electrode 7, the second electrode 8 to have two access interface;
Between the first described electrode 7 and the second electrode 8, by microchannel 13, connect;
Described the first storage tank 9, the second storage tank 10, the 3rd storage tank 11 are located on microchannel 13;
The described storage tank 12 that converges is communicated with the first storage tank 9, the second storage tank 10, the 3rd storage tank 11;
Chip cover card 17 one end are provided with inserted sheet 14, and biochip mainboard 2 inserts in chip cover card 17 by plectrum groove 16.
Described sample splashes into the position of notch 3 and converges storage tank 12 and matches.
The sample configuration that splashes into notch 3 for sample is below mixed the description make an exemplary:
Embodiment 1:
By changing the thickness of pedestal cover plate 4, make 5 kinds of different sensors of sample feed path height.The area of the first electrode 7 is 1.0mm2.The second electrode 8 is circles that diameter is about 3.6mm, because its diameter is greater than the amplitude in the gap 18 of flap plate 4, so some does not expose in sample feed path.In the sample feed path of the second electrode 8, the area of exposed portions serve is about 5.3mm2.As a comparative example, be formed on same pole plate, there is the first electrode 7 and the second electrode 8 compare liquid sensor.Make 5 kinds of different comparison liquid sensors of sample feed path height.On the biochip mainboard 2 extremely being formed by polyethylene terephthalate, by serigraphy, stamp silver slurry, form the first electrode 7 lead-in wires and the second electrode 8 lead-in wires, then, print the electric conductivity carbon paste of resinous bonding agent, form the first electrode 7.This first electrode 7 contacts with the first electrode 7 lead-in wires.On pedestal cover plate 4, printing insulativity slurry, forms insulation course again.Insulation course covers the periphery of biochip mainboard 2, with this, makes the exposed portions serve area of the first electrode 7 keep certain.Then, on biochip mainboard 2, print the electric conductivity carbon paste of resinous bonding agent, make it to contact with the second electrode 8 lead-in wires, to form the second electrode 8.The area of the first electrode 7 is about 1.0mm ", in the sample feed path of the second electrode 8, the area of exposed portions serve is about 4.3mm2.After aqueous solution containing the GOD of enzyme and the red salt of electronic conduction body is dripped on the first electrode 7 and the second electrode 8, drying forms reagent layer, on this reagent layer, forms the surfactant layer of the lecithin that contains surfactant.Then these pedestal cover plates 4, the leachy cover plate of tool and the frid 5 with gap IH are carried out bonding.Adopt the sensor of the above embodiments 1 and comparative example, the mensuration to the liquid concentration of comparing containing the aqueous solution of a certain amount of comparison liquid.Sample is sent into sample feed path from sample supply port, and after certain hour, second electrode 8 of take is benchmark, adds the voltage of 800mV on the first electrode 7.This voltage that utilization adds, is determined at 8 mobile current values of the first electrode 7 and the second electrode, observes and compares the proportional current-responsive of liquid concentration in sample.For the comparison liquid hold-up solution that is 180mg/d1, utilize sample feed path height different respectively compare liquid sensor, measure response current value.Figure 4 shows that the curve map of relation between the sample feed path height of sensor of embodiment 1 and response (ratio).Response (ratio) represents response that the sensor that utilizes the comparative example that sample feed path height is equal the is obtained ratio as 100.
As can be seen from Figure 4, if the height of sample feed path is less than skilful 150 microns, embodiment 1 will sharply increase with respect to the response (ratio) of comparative example.This can think because the first electrode 7 is mutually relative with the second electrode 8, as the distance of 8, the first electrode 7 and the second electrode is less than 150pm, on the first electrode 7, the growth of the diffusion layer of redox kind is suppressed, the concentration reflection sensor response of the redox kind on the second electrode 8, and the result that causes such as the fine movement of the charge energy between the first electrode 7 and the second electrode 8.In embodiment 1, measure needed sample size and be about 0.5-3.0pl again.According to the utility model like this, because the distance of 8, the first electrode 7 and the second electrode is restricted, therefore can reduces and measure needed sample size.
Embodiment 2:
In example 2, the area of the first electrode 7 and the second electrode 8 is all 1.0mm2, in addition, adopts the method same with embodiment to make biology sensor.Then, for the solution that is 90mg/d1 containing comparison liquid, utilize sample feed path height different respectively compare liquid sensor, measure response current value.Response (ratio), represents response that the sensor that utilizes the embodiment 1 that sample feed path height is equal the is obtained ratio as 100.The sensor of embodiment 2 will sharply increase with respect to the response (ratio) of embodiment 1.This can think because the first electrode 7 is mutually relative with the second electrode 8, as the distance of 8, the first electrode 7 and the second electrode is less than 150pm, on the first electrode 7, the growth of the diffusion layer of redox kind is suppressed, the concentration reflection sensor response of the redox kind on the second electrode 8, and the result that causes such as the fine movement of the charge energy between the first electrode 7 and the second electrode 8.In general galvanochemistry, for preventing from retraining the reaction in the second electrode 8, the area of the second electrode 8 is done greatlyr than the area of the first electrode 7.But, due to the first electrode 7 and the relative configuration of the second electrode 8, the therefore reflection of the current density on the second electrode 8 current-responsive, due to these reasons, than the area of the second electrode 8 be greater than the situation of the area of the first electrode 7, can obtain high response current.
In the present embodiment, due to the area of the second electrode 8 and equating of the first electrode 7, the position that sample splashes into notch 3 more approaches sample supply port than embodiment 1.Therefore, measuring needed sample size can further reduce.In the present embodiment, the area of the second electrode 8 is 0.64 micron to embodiment 3, makes similarly to Example 2 in addition biology sensor.Then, for the solution that is 90mg/d1 containing comparison liquid, utilize sample feed path height different respectively compare liquid sensor, measure response current value.
In the present embodiment, because the area of the second electrode 8 is less than the area of the first electrode 7, the position that sample splashes into notch 3 can more approach sample supply port side than embodiment 2.Therefore, can further reduce and measure needed sample size than embodiment 2.The possibility of utilizing in industry as mentioned above, by technology of the present utility model, can obtain in mensuration the few and highly sensitive biology sensor of needed sample size.
Claims (2)
1. the micro sensing equipment and instrument of hand-held fast detecting food additives, it is mainly configured with: pedestal drain pan (1), biochip mainboard (2), sample splashes into notch (3), pedestal cover plate (4), frid (5), fixing string pin (6), the first electrode (7), the second electrode (8), the first storage tank (9), the second storage tank (10), the 3rd storage tank (11), converge storage tank (12), microchannel (13), inserted sheet (14), plectrum (15), plectrum groove (16), chip cover card (17), it is characterized in that: on pedestal drain pan (1), be covered with biochip mainboard (2), pedestal cover plate (4) can dimidiation, and centre position has sample drop and enters notch (3), pedestal cover plate (4) both sides are frid (5), and frid (5) is fixing by fixing string pin (6),
Described biochip mainboard (2) is provided with the first electrode (7), the second electrode (8); And there are the first electrode (7), the second electrode (8) to have two access interface;
Between described the first electrode (7) and the second electrode (8), by microchannel (13), connect;
Described the first storage tank (9), the second storage tank (10), the 3rd storage tank (11) are located on microchannel (13);
The described storage tank (12) that converges is communicated with the first storage tank (9), the second storage tank (10), the 3rd storage tank (11);
Chip cover card (17) one end is provided with inserted sheet (14), and biochip mainboard (2) inserts in chip cover card (17) by plectrum groove (16).
2. the micro sensing equipment and instrument of a kind of hand-held fast detecting food additives according to claim 1, is characterized in that position that described sample splashes into notch (3) and converges storage tank (12) and match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577555.3U CN203519554U (en) | 2013-09-17 | 2013-09-17 | Hand-held type micro sensing device capable of quickly detecting food additives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577555.3U CN203519554U (en) | 2013-09-17 | 2013-09-17 | Hand-held type micro sensing device capable of quickly detecting food additives |
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| CN203519554U true CN203519554U (en) | 2014-04-02 |
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| CN201320577555.3U Expired - Fee Related CN203519554U (en) | 2013-09-17 | 2013-09-17 | Hand-held type micro sensing device capable of quickly detecting food additives |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20140917 |
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| EXPY | Termination of patent right or utility model |