CN2611904Y - Multifunctional detector for poisonous chemical residual pollutant in foodstuff - Google Patents
Multifunctional detector for poisonous chemical residual pollutant in foodstuff Download PDFInfo
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- CN2611904Y CN2611904Y CN 03240360 CN03240360U CN2611904Y CN 2611904 Y CN2611904 Y CN 2611904Y CN 03240360 CN03240360 CN 03240360 CN 03240360 U CN03240360 U CN 03240360U CN 2611904 Y CN2611904 Y CN 2611904Y
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Abstract
The utility model discloses a multifunctional detecting instrument for checking toxic chemical pollutant residua in foods, which comprises a light source, a monochromator, a colorimetric pool, photoelectric detectors, a microprocessor, a display screen, an electrical source, and press keys, wherein the light source and the monochromator are integrated to be a homogeneous light generating device, in specific to a light-emitting diode or a semiconductor laser with setting wavelength, a colorimetric bottle with a sealed cover and a locater with a head restraint are disposed in the colorimetric pool which is a multi-channel constant temperature reaction colorimetric pool, and comprises a lower end plate, several channels, colorimetric bottles disposed in the channels, an upper end plate for covering the channels, and a heater, a refrigerator, and a temperature sensor which are disposed in the lower end plate, a plurality of light-emitting diodes or semiconductor lasers are staggered in linear and disposed on one side of the channels, and the photoelectric detectors with the same number as the light-emitting diodes or semiconductor lasers are relatively disposed on the other side of the channels. The utility model can flexibly, rapidly, simply, and accurately check out toxic substances in samples, which can simultaneously check one or more programs.
Description
Technical field
The utility model relates to a kind of small-sized and portable sensitivity, easy, express-analysis instrument, be specifically related to a kind of fast detecting food that is used for, as residual toxicity (organophosphorus, carbamate) in Cereals, tealeaves, fruits and vegetables and inspissated juice, pork, poultry, the aquatic products etc., and the detector of heavy metal elements such as violate a ban in the food chemicals such as formaldehyde, formaldehyde time sodium bisulfite, nitrate, nitrite, sulphite, sulphuric dioxide, surfactant and lead, mercury, cadmium, chromium, arsenic etc.
Background technology
Food-safety problem is the significant problem of closing serial people ' s health and national economy, and China is in basic solution food supply, and the safety of food substance more and more causes the concern of the whole society.Food pollution is the subject matter that influences food security, a series of world-shaking food pollution incidents (as rabid ox disease, bioxin, aftosa etc.) took place in recent years in the world in succession, form the shock wave of each food hygiene problem, make the security of food become the focus that people pay close attention to, also caused the great attention of relevant office of international organization and national governments.
Federal Government Environmental Protection Agency (EPA) gave a warning in a analysis report on May 31st, 2002: 2/3 Americans live in the toxic chemical substance excess, cause in the dangerous zone of rising of pathogenesis of cancer.
Entered since mid-term in 20th century, the amount of application of the pesticide producing of countries in the world sharply increases, three wastes discharge amount constantly rises, the predatory Development and Production of agricultural and spray insecticide in a large number germ and insect are developed immunity to drugs, the vicious cycle that causes dose and disease and pest to increase progressively mutually.Undressed three wastes material directly is discharged in river course or the deep-well, the vegetable grower then directly is used for irrigating, soil and vegetables are polluted, some area is then with sanitary sewage, hospital sewage pouring, make vegetables attach a large amount of bacteriums, virus, microbial toxin, cause disease to increase after the food, in the food transporting procedures, multiple microorganism not only causes the food moldy metamorphism, produces extremely strong carcinogenic substances such as biotoxin, aflatoxins β 2.
In recent years, western countries serve as reasons with " microbiotic exceeds standard " to the honey of China outlet European Union with the name of " green ", are closed down, and the vegetables that some are local are because agricultural chemicals exceeds standard, by Japan's embargo.By agricultural sector's statistics, national agricultural chemicals use amount had reached 1,200,000 tons in 1997, account for very big ratio because residues of pesticides cause food poisoning in the food poisoning sum, and mortality ratio was higher.Can cause acute poisoning or subacute poisoning accident when people are edible after containing the remains of pesticide vegetables of high dose.In addition, agricultural chemicals is eaten by the people by terrestrial organism and the concentrated back of hydrobiont by food chain, and some agricultural chemicals such as organochlorine are because its chemical property is stable, fat-soluble strong, with enzyme and protein higher affinity is arranged, thus be difficult for excreting, thereby accumulation is in vivo.The process food chain can accumulate concentrated gradually, and this phenomenon is called biological concentrating.In the fish body, can concentrate mutual 20ppm as 0.001ppm D.D.T. (dichloro-diphenyl-trichloroethane) after five weeks and reach 20,000 times.Agricultural chemicals enters human body mainly by food, drinking-water and three kinds of approach of breathing, and wherein the agricultural chemicals that enters human body by food accounts for 90%.Other account for 10%.The organochlorine farming is residual can't be taken in this vegetables and will accumulate in human body for a long time because of storage processing, the cooking reduce.Even under situation about no longer increasing, also need the time of decades just can reduce to low-level.Edible nitrosamine, the biphenylamine, 3 of containing of normal phase, 4-benzo ratio, the red B pigment of Luo Ming, cumarin etc. are accumulated in can cause in the human body sends out a cancer.
Aspect food toxic chemical pollutant residue detection, country has formulated the assay method of the industry standard and the poisonous and harmful substance of pollution-free food, its detection method has chemical analysis, gas chromatography, liquid phase chromatography, atomic absorption spectrography (AAS), fluorescent spectrometry, a series of sensitive and accurate methods such as spectrophotometric, but they mostly are not suitable for fast detecting.
In rapid detection apparatus, just like residues of pesticides F200 type residues of pesticides high speed tester, the full-automatic residual toxicity of pesticide of RD-410 type, CL-BIII type remains of pesticide analyzer and application number are 01306215 residual toxicity of pesticide, application number is 01218292 residual toxicity of pesticide and 99222146 portable residual pesticides analyzers, they mostly adopt chromogenic reaction to detect persticide residue, all there is particular requirement used light source, monochromator and sample chamber, and it is residual directly to be used for detecting in the food toxic chemical pollutant.Up to now, still be not reported and be used for the residual rapid detection apparatus of food toxic chemical pollutant.
The utility model content
The purpose of this utility model provides a kind of multifunctional food toxic chemical pollutant residue detection instrument, can sensitive, quick, easy, accurately detect food, as Cereals, tealeaves, fruits and vegetables and inspissated juice etc., animal-derived food, as pork, poultry, aquatic products, with the chemicals of violating a ban in the food, residual as poisonous and harmful chemical pollutants such as heavy metal element such as formaldehyde, rongalite, nitrate, inferior pin hydrochlorate, sulphite, sulphuric dioxide, surfactant and plumbous mercury, cadmium, chromium, arsenic.
For achieving the above object, the utility model adopts following design proposal:
The multifunctional food toxic chemical pollutant residue detection instrument that the utility model provides, comprise: go forward side by side microprocessor that line data handles and be installed in the switch of display screen that casing shows the microprocessor processes result outward, power supply, control power supply and regulate the button of concentration of the detection signal that is installed in light source in the casing, monochromator, colorimetric pool, photoelectric detector, the described detecting device of reception, it is characterized in that, described light source and monochromator are the monochromatic light generating means of one, are specially light emitting diode or the semiconductor laser of setting wavelength.
In the above-mentioned multifunctional food toxic chemical pollutant residue detection instrument, place a colorimetric bottle in the described colorimetric pool, described colorimetric bottle with closure closes on injection port place ring at described colorimetric bottle outer wall and establishes steady arm, described steady arm band dop.
In the above-mentioned multifunctional food toxic chemical pollutant residue detection instrument, described colorimetric pool is hyperchannel isothermal reaction/colorimetric pool.
Described hyperchannel isothermal reaction/colorimetric pool comprises: bottom plate, place the some passage bodies on the bottom plate, place colorimetric bottle in the described passage body, cover the upper head plate of passage body, place well heater, refrigerator and temperature sensor in the bottom plate, described light emitting diode or semiconductor laser are a plurality of, linearly staggering places a side of described passage body, and described photoelectric detector places the opposite side of described passage body with same number correspondence.
In the above-mentioned multifunctional food toxic chemical pollutant residue detection instrument, described light emitting diode or semiconductor laser photoelectric detector are one to nine, and described hyperchannel is 2,3,4,5,6,7,8,9,10,12,16,20,24,48 or 96 passages.
In the above-mentioned multifunctional food toxic chemical pollutant residue detection instrument, described colorimetric bottle band scale, injection port is established rubber plug, closes on injection port place ring at described colorimetric bottle outer wall and establishes steady arm.Described steady arm band dop, described hyperchannel isothermal reaction/colorimetric pool upper head plate are established and the bayonet socket of described dop to colorimetric bottle is located.
In the above-mentioned multifunctional food toxic chemical pollutant residue detection instrument, described passage body xsect is hexagon, square, square or rectangle.
In above-mentioned all multifunctional food toxic chemical pollutant residue detection instruments, the single setting wavelength of described light emitting diode or semiconductor laser is 400nm, 405nm, 408nm, 410nm, 412nm, 420nm, 430nm, 440nm, 450nm, 460nm, 470nm, 480nm, 490nm, 500nm, 510nm, 520nm, 530nm, 540nm, 550nm, 560nm, 570nm, 580nm, 590nm, 600nm, 610nm, 620nm, 630nm, 640nm, 650nm, 660nm, 697nm, 830nm, 860nm, 910nm, 925nm, 940nm, 950nm, 960nm, 980nm, 1006nm or 1025nm.
In above-mentioned all multifunctional food toxic chemical pollutant residue detection instruments, described photoelectric detector is the integrated electro sensor, and model is TSL201, TSL202, TSL203, TSL204, TSL205, TSL206, TSL207, TSL208, TSL209, TSL210, TSL220, TSL235, TSL245, TSL250, TSL251, TSL252, TSL253, TSL254, TSL255, TSL256, TSL257, TSL260, TSL261 or TSL262.
The utility model adopts technique scheme, and its distinguishing feature is:
● utilize the utility model, can adopt national standard method, directly demonstrate the concentration of enzyme inhibition rate (expression residual toxicity amount size) and absorbance or determinand.
● adopt building block technique mode (all solid state light source/monochromator and detecting device), can detect a project or a plurality of project simultaneously, no movable member, subjective error are little, accuracy, precision and analysis efficiency height.
● the design of colorimetric bottle, make color comparison tube double as reaction tube, need not to shift sample, chemical reaction, biochemical reaction, colour developing and mensuration are integrated, can realize online detection.
● isothermal reaction (chemical reaction and the biochemical reaction) colorimetric pool (0～60 ℃ is adjustable) of 1～96 passage can be provided with, the measurement of a plurality of projects or variety classes sample can be realized detecting simultaneously.
● real-time display environment and heated at constant temperature actuator temperature, can set inhibitory reaction, cultivation and developing time, be convenient to experimental implementation.
But ● the random arrangement program, select various combination analysis and printing type, be provided with RS-232 interface, and join the PC communication outward.
● powerful storage memory function can store 1024 data, and have self check and automatic the warning and multiple statistical procedures function.
● giant-screen Chinese shows, man-machine interactive operation, and volume is little, and is in light weight, easy to carry.
Description of drawings
Fig. 1 is the utility model inner structure synoptic diagram;
Fig. 2 is a kind of embodiment external structure of the utility model synoptic diagram;
Fig. 3 is the another kind of embodiment external structure of a utility model synoptic diagram;
Fig. 4 is a colorimetric bottle structural representation in the utility model;
Fig. 5 is hyperchannel isothermal reaction/colorimetric pool structural representation in the utility model;
Fig. 6 is a thermostat circuit connection diagram in the bottom plate in the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described:
The multifunctional food toxic chemical pollutant residue detection instrument that the utility model proposes is based on that the reaction of test substance and developer generates colored compound in the sample, the principle that this compound absorbs the visible light selectivity and colorimetric analysis method and the instrument set up.As, organophosphorus, carbamate can adopt enzyme rejection ratio color method in the food; Formaldehyde in food, rongalite can adopt acetylacetone method, phenol reagent process, AHM method or chromotropic acid colourimetry.The utility model is applicable to the fast detecting with the chemicals poisonous and harmful substances such as (heavy metal elements such as formaldehyde, formaldehyde Sodium Thiosulfate, nitrate, nitrite, sulphite, sulphuric dioxide and lead, mercury, cadmium, chromium, arsenic) of violating a ban in residual toxicity (organophosphorus, carbamate) and the food in the colorimetry for quick analysis food (Cereals, tealeaves, fruits and vegetables and inspissated juice, pork, poultry, aquatic products etc.).
On structure, the utility model comprises housing 16 and is included in the inner structure among the housing 16 and is emerging in external structure outside the housing 16.Constitute basic identical with existing tintmeter, referring to Fig. 1, the utility model inner structure is made of light source/monochromator 1, colorimetric pool 2, detecting device 3, microprocessor 4 and power supply 5, here, the present invention is integrated the light source and the monochromator of prior art, light source/monochromator is for sending the monochromatic light source of setting wavelength, available super bright light emitting diode or semiconductor laser.Be connected with circuit by light path between above-mentioned each parts, wherein, the monochromatic light that light source/monochromator 1 sends is radiated on the photoelectric detector 3, with change in optical signal is electric signal, and input microprocessor 4, microprocessor 4 exports data to display screen 6 (referring to Fig. 2) through computing.External structure of the present utility model, as Fig. 2, shown in Figure 3, mainly contain the LCDs 6 that shows computing machine 4 output results, printing computer 4 output results' printer 7, the 220V on/off key 15 of control power switch, 9V on/off key 17, be connected to microprocessor 4 circuit and return button 8, on turn over button 9, under turn over button 10, confirm button 11, zeroing button 18, concentration button 19, RS-232 interface 13, power interface 14, battery case 20, above-mentioned each parts are connected with conventional line with microprocessor 4 respectively, and this light path and circuit are existing connected mode, such as using patent documentation 92210315.1 disclosed circuit and light paths, therefore locate non-the utility model innovation, do not give unnecessary details at this.
Innovation part of the present utility model is the improvement in contrast colors pond 2.In traditional tintmeter, generally be to carry out after chromogenic reaction finishes at testing sample, the solution of colour developing is moved on in the colorimetric pool from it, and colorimetric pool is generally the groove shape, the interior solution to be measured of groove becomes easily infected by outer wall and instrument.The utility model changes the structure of original colorimetric pool fully, makes it both can finish chromogenic reaction, again can colorimetric.
In a kind of embodiment of the present utility model, place a colorimetric bottle 36 in the colorimetric pool 2, colorimetric bottle 36 structures are referring to Fig. 5, and colorimetric bottle 36 is with scale mark for perpendicular long shape on its wall, and injection port is established a gland bonnet 37, closely covers with colorimetric bottle 36; Close on the injection port place at colorimetric bottle 36 outer walls, be provided with steady arm 34, band dop 35 on the steady arm 34.Present embodiment can be referring to Fig. 3, and colorimetric bottle 36 can directly insert in the colorimetric pool 2, and it is big slightly that colorimetric pool 2 holes are reserved in gland bonnet 37 terminations, can be used to the hermetically-sealed instrument external light.Gland bonnet 37 can select for use elastomeric material to make.Here, colorimetric bottle 36 can take out with the need, and developer and testing sample all can add wherein, and chromogenic reaction is finished in colorimetric bottle, and the colorimetric pool 2 of putting into detector afterwards again carries out colorimetric estimation.In this example, the super bright light emitting diode of use or semiconductor laser are a light source of setting wavelength, and photoelectric detector also is corresponding the setting.
In another better embodiment of the present utility model, colorimetric pool 2 adopts hyperchannel isothermal reaction/colorimetric pool 12.Its structure as shown in Figure 4 and Figure 5, hyperchannel isothermal reaction/colorimetric pool 12 is made into 1,2,3,4,5,6,7,8,9,10,12,16,20,24,48,96 passages respectively, can detect a plurality of projects simultaneously, hyperchannel isothermal reaction/colorimetric pool 12 has upper head plate 22, bottom plate 23, establish passage body 33 between the upper and lower end plate 22,23, wear well heater 24, refrigerator 25, temperature sensor 26 in the bottom plate 22.Passage body 33 is hexagon, square, square or rectangle, super bright light emitting diode or semiconductor laser 27,28,29 linearly divide a side that is located at passage body 33, and integrated electro sensor 30,31,32 correspondences are located at the another side of passage body 33.In the middle of passage body 33, place colorimetric bottle 36, colorimetric bottle 36 can be the cylindrical glass bottle of band scale mark, referring to Fig. 5, is with scale mark on its wall, and injection port is established a gland bonnet 37, closely covers with colorimetric bottle 36; Close on the injection port place at colorimetric bottle 36 outer walls, ring is established steady arm 34, band dop 35 on the steady arm 34, dop 35 correspondences therewith, establish colorimetric bottle steady arm bayonet socket 21 (referring to Fig. 4) on upper head plate 22, dop 35 can dock mutually with bayonet socket 21, with this fixing colorimetric bottle 36.
In this example, super bright light emitting diode of placing on each passage body 33 or semiconductor laser and integrated electro sensor are three, also can place one to nine as required.
In this example, in bottom plate 22, wear well heater 24 especially, refrigerator 25, temperature sensor 26, they respectively with power supply 5, the button that is provided with on microprocessor 4 and the shell is connected, referring to Fig. 6, be the circuit connection diagram between the above-mentioned device, wherein, well heater 24 and refrigerator 25 adopt aluminium block as heating and refrigerant, in the aluminium block bottom ceramic heating element is set, semiconductor cooler and temperature sensor 26, ceramic heating element, semiconductor cooler and temperature sensor by microprocessor 4 respectively with shell on button be connected with power supply 5, by this circuit, the temperature in control hyperchannel isothermal reaction/colorimetric pool 12.
In the present embodiment, light source/monochromator 1 is super bright light emitting diode or semiconductor laser, they are not only done the light source while but also make monochromator, manufacturer is day Asia and the Toyota Company of Japan, wavelength is respectively 400nm, 405nm, 408nm, 410nm, 412nm, 420nm, 430nm, 440nm, 450nm, 460nm, 470nm, 480nm, 490nm, 500nm, 510nm, 520nm, 530nm, 540nm, 550nm, 560nm, 570nm, 580nm, 590nm, 600nm, 610nm, 620nm, 630nm, 640nm, 650nm, 660nm, 830nm, 860nm, 910nm, 925nm, 940nm, 950nm, 960nm, 980nm, 1006nm or 1025nm, luminance parameter must can adopt continuously or the pulse mode power supply more than 1000mcd;
Colorimetric bottle 36 is preferably the vial of band rubber plug, its external diameter is 10～60mm, 0.5ml, 1.0ml, 2.0ml, 3ml, 4ml, 5mL, 10mL, 20mL, 30mL, 40mL and 50mL scale mark are arranged on the vial surface, sealing-plug can closely cooperate with colorimetric bottle 36, prevents that solution overflows in the colorimetric bottle; The material that enclosure-type colorimetric bottle steady arm 34 adopts is plastics or aluminium, is connected with colorimetric bottle 36 screw thread mouths, can freely insert location in the colorimetric pool steady arm bayonet socket 21;
1,2,3,4,5,6,7,8,9,10,12,16,20,24,48,96 passages are set on hyperchannel isothermal reaction/colorimetric pool 12, can heat simultaneously or colorimetric measurement, the material that passage body 33 adopts is plastics, copper, aluminium or steel, its internal diameter is 10.1～60.1mm, external diameter is 16～66mm, makes colorimetric bottle 36 location by the bayonet socket 21 on the dop on the enclosure-type colorimetric bottle steady arm 34 35 and the hyperchannel isothermal reaction/colorimetric pool 12; Passage body 33 xsects can be rectangle, square, quadrilateral or hexagon, and the inboard is cylindrical,
At passage body 33 1 ends 1～9 different wave length (400nm is installed, 405nm, 408nm, 410nm, 412nm, 420nm, 430nm, 440nm, 450nm, 460nm, 470nm, 480nm, 490nm, 510nm, 520nm, 530nm, 540nm, 550nm, 560nm, 570nm, 580nm, 590nm, 600nm, 610nm, 620nm, 630nm, 640nm, 650nm, 660nm, 830nm, 860nm, 910nm, 925nm, 940nm, 950nm, 960nm, 980nm, 1006nm, 1025nm) super bright light emitting diode or semiconductor laser, and (with the super bright light emitting diode or the relative other end of semiconductor laser) installs 1～9 detecting device on the face relative with it, detecting device is the integrated electro sensor, model is respectively TSL201, TSL202, TSL203, TSL204, TSL205, TSL206, TSL207, TSL208, TSL209, TSL230, TSL235, TSL245, TSL250, TSL251, TSL252, TSL253, TSK254, TSL255, TSL256, TSL257, TSL258, TSL259, TSL260, its major parameter are that spectral response is 350～1000nm;
When carrying out sample measurement, send monochromatic light by the colorimetric bottle 36 in colorimetric pool 2 or the hyperchannel isothermal reaction/colorimetric pool 12 by LED or semiconductor laser 1, after being absorbed have coloured light after testing device 3 become electrical signal transfer and give microprocessor 4, after the computing, the result shows on LCDs 6; Microprocessor 4 is by temperature sensor 26 control hyperchannel isothermal reaction/colorimetric pools 12 temperature; Print measurement result by printer 7.The data and the measurement result of storage can pass on the PC by RS one 232 interfaces 14, print the analysis result information list with forms mode.
LED or semiconductor laser light source 1, refrigerator 25, temperature sensor 26, detecting device 3 are installed in colorimetric pool 2 or the hyperchannel isothermal reaction/colorimetric pool 12, and microprocessor 4, power supply 5 are installed in the housing 16; Colorimetric pool 2 or hyperchannel isothermal reaction/colorimetric pool 12 are connected with housing 16, the colorimetric bottle 36 of band rubber plug is connected with colorimetric bottle steady arm 34, colorimetric bottle 36 is positioned in colorimetric pool 2 or the hyperchannel isothermal reaction/colorimetric pool 12, upper head plate 22 is connected with passage body 33 with bottom plate 23, passage body 33 can be hexagon, square, square or rectangle, place 1～9 super bright light emitting diode or semiconductor laser 27,28 and 29 respectively at the one end, the other end relative with it placed 1～9 integrated electro sensor 30,31,32, its structure such as Fig. 4, Fig. 5. Selector button 8,9,10,11,17,18,19 has four, be respectively return push-button 8, on turn over button 9, turn over button 10 and confirm button 11,9V on/off key 17, zeroing button 18, concentration button 19 down, they are connected with microprocessor 4 circuits respectively, send instruction for microprocessor 4; Print measurement result by printer 7.And by the data of acknowledgement key 11 storage by RS-232 interface 14 and PC communication, provide the analysis result information list by PC; Power interface 14 1 ends are connected with the 220V power supply, and the other end is connected with the rechargable power supplies of instrument internal, provides energy to instrument.
Introduce using method of the present utility model below in conjunction with concrete operations:
1, organophosphorus and carbamate pesticide residual toxic dose detect in fruits and vegetables, tea and the meat
Method one
● sample collecting and preparation:
Vegetable sample is wiped surperficial muddy water, gets representative food portion, shreds (or being cut into 1 * 1cm or 2 * 2cm bulk), gets the beaker that 1～2g places 5～10ml band groove; Get the beaker that 0.5g～2.0g tea places 5～10ml band groove; Get 0.5～2.0g meat and place 10ml band groove beaker, add 5～10ml acetone respectively and soaked 5～10 minutes in above-mentioned sample, jolting frequently is (or with Extraction by Ultrasound 3～5min), (vegetable sample is if color is darker to add 0.2g lime carbonate again, can add the 0.2g activated charcoal, shake up, filter).
● oxidation
Get fruits and vegetables, tea and meat acetone extract 0.5ml～2.0ml respectively in the cylindrical colorimetric bottle of 10ml band groove (or in 10ml beaker), after drying up acetone, add the dissolving of 0.3～1.0ml damping fluid, add oxygenant 0.1～0.5, shake up the back and place 10min, add reductive agent 0.3～1.0ml again, shake up.
● enzymolysis and mensuration
(or in 10ml beaker) adds enzyme liquid 0.1～0.5ml respectively in cylindrical colorimetric bottle, shakes up, and places 10min, add substrate solution 0.1～0.5ml again, developer 0.1～0.5ml behind the placement 5min, is photometer or its absorbance of spectrophotometric determination of 600nm at wavelength.
Method two
● sample collecting and preparation:
Vegetable sample is wiped surperficial muddy water, get representative food portion, shred (or being cut into 1 * 1cm or 2 * 2cm bulk), get the beaker that 1～2g places 10ml band groove, get 0.5～1.0g tea and place another 10ml band groove beaker, get 0.5～1.0g meat and place another 10ml band groove beaker.
In above-mentioned sample, add 5～10ml damping fluid respectively as extracting solution submergence sample, vibrate 3～5 minutes or with Extraction by Ultrasound 3～5 minutes or mix up placement 15 minutes at set intervals (the fruits and vegetables sample is darker as if color, can add the 0.2g activated charcoal; Shake up, filter).
● enzymolysis and mensuration
" proofread and correct, test is got 1.0～5.0ml extract in the cylindrical colorimetric bottle of 10ml band groove, and below operation is identical with sample test.
Sample test
Get 1.0～5.0ml sample extracting solution respectively in the cylindrical colorimetric bottle of 10ml band groove (or in color comparison tube), add enzyme liquid 1～4 (or 0.05～0.20ml) with plastic dropping bottle, 1～4 (0.05～0.20ml) of developer, put into constant temperature (37 ℃) colorimetric pool 10～20min, (0.05～0.20ml) substrate mixing is measured the absorbance of 3 minutes front and back and is demonstrated inhibiting rate to add 1～4 then.
2, formaldehyde in food and rongalite residual quantity detect
● sample collecting and preparation
Get solid food 2.0～10.0g (or liquid food 2.0～10.0 milliliters) in the 500ml cucurbit, add distilled water 10ml, shake up the back and adopt the steam distillation method, the solution constant volume after the distillation is in the 250ml volumetric flask.Shake up, standby.Assay method one (diacetone colourimetry)
● sample: accurately pipette 5ml～10ml sample after treatment solution to be measured in 25ml color-comparison tube 1 with clean pipettor, be diluted with water to 10ml, accurately pipette formaldehyde reagent (food) 2ml in color comparison tube 1, covering bottle stopper shakes up, the water-bath of putting into 40 ± 2 ℃ heated 15 minutes, take out, be cooled to room temperature in the dark place.
● blank: be to add water to 10ml in the 25ml color-comparison tube 2.Below operation is identical with sample operation.
● wash colorimetric bottle 1 and 2 inwalls 2 times respectively with small volume of solution in the color comparison tube 1 and 2, all pour into solution in color comparison tube 1 and 2 in colorimetric bottle 1 and 2 respectively then, cover the colorimetric bottle plug, screw the colorimetric bottle steady arm, clean the outer wall of colorimetric bottle 1 and 2, colorimetric bottle 1 and colorimetric bottle 2 are put into colorimetric pool lock.
● after returning button 8, by on turn over button 9 and turn over button 10 down or zeroing button 18 selection mode determination (as selecting wavelength 412nm for use) and blank measures, then by the content of formaldehyde that can demonstrate behind acknowledgement key 11 or the concentration button 19 in the sample.
Assay method two～four (phenol reagent colourimetry, AHMT colourimetry and chromotropic acid colourimetry)
Use the phenol reagent colourimetry, AHMT colourimetry and chromotropic acid colourimetry, identical with above-mentioned example assay method, just according to different color mechanisms, the reagent difference of packing in the used reagent pipe, the absorbing wavelength of selecting for use (630,550 with 575nm) is different with solution colour, in this example no longer one by one.
Use said method, can measure sulphite in foods, sulphuric dioxide, nitrite, nitrate, lead, mercury, cadmium, chromium and arsenic heavy metal etc. equally.
Through check, the key technical indexes of the present utility model can reach:
● lower mensuration lower limit: the mensuration lower limit as organophosphorus and carbamate is respectively 0.10mg/kg and 0.20mg/kg; Be limited to (0.01mg/kg or 0.01mg/L) under the mensuration of formaldehyde, rongalite.
● the measurement range of broad: organophosphorus and carbamate are respectively 0.0～20.0mg/kg and 0.0～15.0mg/L, and formaldehyde, rongalite are 0.00～1.00mg/L or 0.00～1.00mg/kg.
● measuring accuracy :≤5%
● measuring method: all adopt standard determination method, adopt the GB enzyme to suppress method, measure formaldehyde, rongalite employing GB phenol reagent, diacetone reagent, chromotropic acid reagent and AHMT reagent method as measuring organophosphorus and carbamate.
● instrument working environment: 5～40 ℃
● instruments weight: 7kg
The utility model instrument has measures the characteristics such as quick, accurate, highly sensitive, easy to use, can extensively answer Be used for various food organophosphors, carbamate, formaldehyde, rongalite, sulfur dioxide, sulfurous acid The residual fast detecting of heavy metal chemical pollutant such as salt, natrium nitrosum and nitrate, lead, cadmium, chromium, mercury and arsenic.
Claims (10)
1. multifunctional food toxic chemical pollutant residue detection instrument, comprise: go forward side by side microprocessor that line data handles and be installed in the switch of display screen that casing shows the microprocessor processes result outward, power supply, control power supply and regulate the button of concentration of the detection signal that is installed in light source in the casing, monochromator, colorimetric pool, photoelectric detector, the described detecting device of reception, it is characterized in that, described light source and monochromator are the monochromatic light generating means of one, are specially light emitting diode or the semiconductor laser of setting wavelength.
2. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 1, it is characterized in that: place a colorimetric bottle (36) in the described colorimetric pool (2), described colorimetric bottle (36) with closure (37), close on injection port place ring at described colorimetric bottle (36) outer wall and establish steady arm (34), described steady arm band dop (35).
3. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 1 is characterized in that: described colorimetric pool (2) is hyperchannel isothermal reaction/colorimetric pool.
4. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 1, it is characterized in that: described hyperchannel isothermal reaction/colorimetric pool comprises: bottom plate (23), place the some passage bodies (33) on the bottom plate (23), place the colorimetric bottle (36) in the described passage body, cover the upper head plate (22) of passage body (33), place the well heater (24) in the bottom plate (23), refrigerator (25) and temperature sensor (26), described light emitting diode or semiconductor laser (27,28,29) be a plurality of, linearly stagger and place a side of described passage body, described photoelectric detector (30,31,32) same number correspondence places the opposite side of described passage body.
5. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 4, it is characterized in that: described light emitting diode or semiconductor laser photoelectric detector are one to nine, and described hyperchannel is 2,3,4,5,6,7,8,9,10,12,16,20,24,48 or 96 passages.
6. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 4 is characterized in that: described colorimetric bottle (36) band scale, injection port is established rubber plug, closes on injection port place ring at described colorimetric bottle (36) outer wall and establishes steady arm (34).
7. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 6, it is characterized in that: described steady arm (34) band dop (35), described hyperchannel isothermal reaction/colorimetric pool (12) upper head plate (22) are established and the bayonet socket (21) of described dop (35) to colorimetric bottle (36) is located.
8. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 4 is characterized in that: described passage body (33) xsect is hexagon, square, square or rectangle.
9. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 1, it is characterized in that: the single setting wavelength of described light emitting diode or semiconductor laser is 400nm, 405nm, 408nm, 410nm, 412nm, 420nm, 430nm, 440nm, 450nm, 460nm, 470nm, 480nm, 490nm, 500nm, 510nm, 520nm, 530nm,, 540nm, 550nm, 560nm, 570nm, 580nm, 590nm, 600nm, 610nm, 620nm, 630nm, 640nm, 650nm, 660nm, 697nm, 830nm, 860nm, 910nm, 925nm, 940nm, 950nm, 960nm, 980nm, 1006nm or 1025nm.
10. multifunctional food toxic chemical pollutant residue detection instrument as claimed in claim 1, it is characterized in that: described photoelectric detector is the integrated electro sensor, and model is TSL201, TSL202, TSL203, TSL204, TSL205, TSL206, TSL207, TSL208, TSL209, TSL210, TSL220, TSL235, TSL245, TSL250, TSL251, TSL252, TSL253, TSL254, TSL255, TSL256, TSL257, TSL260, TSL261 or TSL262.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03240360 CN2611904Y (en) | 2003-03-11 | 2003-03-11 | Multifunctional detector for poisonous chemical residual pollutant in foodstuff |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03240360 CN2611904Y (en) | 2003-03-11 | 2003-03-11 | Multifunctional detector for poisonous chemical residual pollutant in foodstuff |
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| CN2611904Y true CN2611904Y (en) | 2004-04-14 |
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| CN 03240360 Expired - Fee Related CN2611904Y (en) | 2003-03-11 | 2003-03-11 | Multifunctional detector for poisonous chemical residual pollutant in foodstuff |
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