CN102323244A - Method for rapidly detecting portable food packaging fluorescent material and device - Google Patents
Method for rapidly detecting portable food packaging fluorescent material and device Download PDFInfo
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- CN102323244A CN102323244A CN201110141676A CN201110141676A CN102323244A CN 102323244 A CN102323244 A CN 102323244A CN 201110141676 A CN201110141676 A CN 201110141676A CN 201110141676 A CN201110141676 A CN 201110141676A CN 102323244 A CN102323244 A CN 102323244A
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Abstract
The invention relates to a method for rapidly detecting a portable food packaging fluorescent material and a device, and provides a rapid and sensitive method for detecting the portable food packaging fluorescent material and a device. The method comprises the following steps of: placing a sample at a sample stage detection window (6); closing a chassis door (7); keeping the dark condition; exciting a light source to emit exciting light with the wavelength of 254nm or 365nm; regulating the light intensity by a knob (2) or (3); after focusing the light, transmitting the light by an optical fiber and irradiating the light onto the sample by a probe so as to excite the fluorescent material in the sample to generate fluorescent radiation; receiving fluorescent light by a receiving optical fiber in a probe window and transmitting the fluorescent light to a detection unit after filtering; connecting the florescent light with a computer (18) by a data processing system (17) through a USB (Universal Serial Bus) interface; and displaying an analysis result on a computer screen. The device is formed by a chassis, the sample stage, a fluorescence excitation circuit, a fluorescence receiving circuit, an optical fiber splitter and an optical detection and data processing system.
Description
Technical field:
The present invention relates to a kind of detection method and device; Particularly a kind of portable food packing fluorescent material method for quick and device, this method is easy fast, detection sensitivity is high, the result accurately and reliably, this device can be applicable to food security; Law enforcement agency such as quality inspection, the administration for industry and commerce and consumer's field quick detection; Raising is strengthened the control and the management of food security to the supervision and the efficient of packaging for foodstuff fluorescent substance, and the protection consumers in general's is healthy.
Background technology:
Packaging for foodstuff safety is the important component part of food security, with the poisonous and harmful substance that contains in the wrappage of Food Contact, possibly in food, move under certain condition, thereby influence the safety of food.The safety problem that influences packaging for foodstuff is except problem of bacteria; Harmful fluorescent substance also is one of key factor that influences food security; Some enterprises cater to the psychology that the consumer likes white, have a mind to add the whiteness that the harmful chemical fluorescer increases product.Fluorescer has carcinogenesis, and behind the paper product that use fluorescence whiteness exceeds standard, the healthy meeting of consumer receives serious harm.Therefore, strengthen the fluorescent substance supervision to the packaging for foodstuff product, help ensuring food safety, the protection consumers in general's is healthy.
So how detect the fluorescer in the packaging material for food? At present, China mainly adopts the GB/T5009.78-2003 standard for the fluorescent material method of inspection of stationery.According to GB/T 5009.78-2003 standard, application 2 54nm and 365nm uv analyzer detect the fluorescent substance sample.Organoleptic detection, maximum fluorescence area are qualified less than 5 square centimeters, otherwise are defective.This detection method generally will be in the indoor measurement of Specialty Experiment, and operation is complicated, and minute is long, and ordinary consumer is difficult for grasping.For being dispersed little punctate fluorescence property material or fluorescent material content in the wrappage more after a little while, this method is difficult to measure and accurately expresses, and causes the inaccurate of testing result.The detection method of packaging for foodstuff fluorescent material is to deliver to behind the on-site sampling in the relevant laboratory to detect at present, and so not only sense cycle is long, and trace routine is complicated, can not test whenever and wherever possible and detect.
Summary of the invention:
The present invention is directed to the deficiency of prior art; Design and develop a kind of portable food packing fluorescent material fast detecting appearance; Set up quick, sensitive, the easy and result in a kind of scene analyzing detecting method accurately and reliably, realize the on-the site analysis of packaging for foodstuff, the optimum efficiency that zero distance detects.This device has easy operating, and data can be handled automatically, but advantages such as result's site instant demonstration.
In order to realize above-mentioned functions, the present invention adopts following technical scheme:
A kind of portable food packing fluorescent material method for quick; It is characterized in that: thing to be detected is placed on sample stage detection window place (6), closes the Qianmen (7) of cabinet, keeps detecting in the lucifuge condition; After connecting general supply and control system power supply (8) or (9) (as required) switch; It is 254nm or 365nm exciting light that excitation source sends wavelength, and the light intensity of exciting light is adjusted to suitable light intensity through (2) or (3) adjusting knob, and exciting light is through being shone on the sample stage thing to be detected through probe window by the excitation fiber transmission behind the optically focused; Excite the fluorescent material on the thing to be detected to produce fluorescent radiation; Received and transmission by the reception optical fiber in the probe window again, after receiving optical filtering, be sent to detecting unit, and then entering data handling system (17) is handled; Be connected with computing machine (18) through USB interface (10), the result is shown on the computer screen with data analysis again.If there is fluorescence peak to occur, then this determinand has fluorescent material, if do not have then do not have fluorescent material in the decidable determinand.
In the device design, testing sample places the below of probe window (4), sample stage (6) top.The excitation fiber bundle has certain angle (0 °～90 °) between the two with the reception fibre bundle, to form best detection efficiency.
A kind of portable food packing of the present invention fluorescent material device for fast detecting; Constitute by fluorescence excitation light path, fluorescence receiving light path, the fibre bundle that is used for light conducting and sample stage; Described fluorescence excitation light path, fluorescence receiving light path, the fibre bundle that is used for light conducting and sample stage are arranged in the cabinet housing 1; The LED lamp of described fluorescence excitation optical routing excitation source 254nm (11), 365nm (12) ultraviolet light and condenser (13) constitute, and the light intensity of exciting light can be adjusted to suitable light intensity through (2) on the cabinet or (3) adjusting knob.Described fluorescence receiving light path is made up of aspheric mirror (14), concave grating (15) and linear CCD array (16).The fluorescence receiving light path is connected with a signal processing system (17).Be respectively arranged with condenser (13) at described excitation source (11) and excitation source (12) lower end; Be provided with sample stage (6) in described condenser (13) lower end; In described sample stage upper end aspheric mirror (14) is arranged; Be provided with concave grating (15) at described aspheric mirror (14) front end, be provided with linear CCD array (16) at described concave grating (15) front end, described linear CCD array (16) is connected with a data disposal system (17);
Further again, described cabinet housing (1) adopts plastics to process, and cabinet has cabinet button fly front (7).
Description of drawings:
Fig. 1 is the profile synoptic diagram (front) of portable food packing fluorescent material device for fast detecting of the present invention;
Fig. 2 is the profile synoptic diagram (back side) of portable food packing fluorescent material device for fast detecting of the present invention;
Fig. 3 is a structural representation of the present invention;
Label among Fig. 1,2,3 is represented respectively: 1, cabinet, 2,3, the light intensity regulating button of exciting light, 4, probe window, 5, probe cap; 6, sample stage, 7, the cabinet button fly front, 8,9, the control system power supply, 10, USB interface; 11,12 excitation sources, 13, condenser, 14, aspheric mirror, 15, concave grating; 16, linear CCD array, 17, signal processing system, 18, computing machine.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done further detailed explanation
Like Fig. 1, shown in 2 and 3, portable food packing fluorescent material device for fast detecting of the present invention is made up of fluorescence excitation light path, fluorescence receiving light path, the fibre bundle that is used for light conducting and sample stage.Described fluorescence excitation light path and fluorescence receiving light path are arranged in the cabinet housing 1.Described fluorescence excitation optical routing excitation source (11), (12) and condenser (13) constitute, and described fluorescence receiving light path is made up of aspheric mirror (14), concave grating (15) and linear CCD array (16).Be respectively arranged with condenser (13) at described excitation source (11) and excitation source (12) front end; Be provided with sample stage (6) at described condenser (13) front end; In described sample stage upper end aspheric mirror (14) is arranged; Be provided with concave grating (15) at described aspheric mirror (14) front end, be provided with linear CCD array (16) at described concave grating (15) front end, described linear CCD array (16) is connected with a data disposal system (17); Concrete; Be respectively arranged with condenser (13) at described excitation source (11) and excitation source (12) lower end; Be provided with sample stage (6) in described condenser (13) lower end, aspheric mirror (14) arranged, be provided with concave grating (15) at described aspheric mirror (14) front end in described sample stage upper end; Be provided with linear CCD array (16) at described concave grating (15) front end, described linear CCD array (16) is connected with a data disposal system (17);
Further, described excitation source is two LED lamps that can send 254nm (11) and 365nm (12) ultraviolet light respectively, and control corresponding switch (8) and (9) are installed on cabinet, can switch two LED lamps.The light intensity of exciting light can be adjusted to suitable light intensity through (2) on the cabinet or (3) adjusting knob.
The course of work of the present invention is: thing to be detected is placed on sample stage detection window place (6), closes the Qianmen (7) of cabinet, keeps detecting in the lucifuge condition; After connecting general supply and control system power supply (8) or (9) (as required) switch; It is 254nm or 365nm exciting light that excitation source sends wavelength, and the light intensity of exciting light is adjusted to suitable light intensity through (2) or (3) adjusting knob, and exciting light is through being shone on the sample stage thing to be detected through probe window by the excitation fiber transmission behind the optically focused; Excite the fluorescent material on the thing to be detected to produce fluorescent radiation; Received and transmission by the reception optical fiber in the probe window again, after receiving optical filtering, be sent to detecting unit, and then entering data handling system (17) is handled; Be connected with computing machine (18) through USB interface (10), the result is shown on the computer screen with data analysis again.If there is fluorescence peak to occur, then this determinand has fluorescent material, if do not have then do not have fluorescent material in the decidable determinand.
Claims (11)
1. a portable food packing fluorescent material device for fast detecting includes cabinet, fluorescence excitation light path, fluorescence receiving light path, the fibre bundle that is used for light conducting and sample stage and constitutes.It is characterized in that: described fluorescence excitation light path, fluorescence receiving light path, the fibre bundle that is used for light conducting and sample stage are arranged in the cabinet housing (1), and described fluorescence excitation optical routing excitation source (11), (12) and condenser (13) constitute.Described fluorescence receiving light path is made up of aspheric mirror (14), concave grating (15) and linear CCD array (16).The fluorescence receiving light path is connected with a signal processing system (17).
2. portable food packing fluorescent material device for fast detecting according to claim 1; It is characterized in that: described fluorescence excitation light source is two LED lamps that can send 254nm (11) and 365nm (12) ultraviolet light respectively; And control corresponding switch (8) and (9) are installed on cabinet, can switch two LED lamps.
3. portable food packing fluorescent material device for fast detecting according to claim 2, it is characterized in that: the light intensity of described exciting light can be adjusted to suitable light intensity through (2) on the cabinet or (3) adjusting knob.
4. portable food packing fluorescent material device for fast detecting according to claim 1, it is characterized in that: fluorescent exciting and fluorescence receive light and all adopt fibre bundle to conduct.
5. portable food packing fluorescent material device for fast detecting according to claim 4, it is characterized in that: described optical fiber adopts silica fibre, and the diameter of optical fiber is 400 μ m-800 μ m.
6. according to claim 1 and 4 described portable foods packing fluorescent material device for fast detecting, it is characterized in that: the fine bundle of two-beam is housed in this device: excitation fiber bundle and reception fibre bundle.Fibre bundle is included in the probe window (4), and excitation fiber Shu Yiduan links to each other with excitation light path, and its port is aimed at the condenser (13) in the excitation light path; Receive fibre bundle one end and link to each other with receiving light path, its port is aimed at the aspheric mirror (14) of receiving light path.
7. portable food packing fluorescent material device for fast detecting according to claim 6; It is characterized in that: the detection port of said probe window (4) is equipped with probe cap (5); The circular cone shape that probe cap (5) is processed for plastics during detection takes off probe cap (5).
8. according to claim 1 and 6 described portable food packing fluorescent material device for fast detecting, it is characterized in that: in the device design, testing sample places the below of probe window (4), sample stage (6) top.The excitation fiber bundle has certain angle (0 °～90 °) between the two with the reception fibre bundle, to form best detection efficiency.
9. portable food packing fluorescent material device for fast detecting according to claim 1, it is characterized in that: described cabinet housing 1 adopts plastics to process, and cabinet has cabinet button fly front (7).During detection, close the Qianmen (7) of cabinet, keeping detecting is under the lucifuge condition, to accomplish.
10. portable food packing fluorescent material device for fast detecting according to claim 1, it is characterized in that: described sample stage (6) is the sample stage of Liftable type.
11. portable food packing fluorescent material method for quick; It is characterized in that: thing to be detected is placed on sample stage detection window place (6), closes the Qianmen (7) of cabinet, keeps detecting in the lucifuge condition; After connecting general supply and control system power supply (8) or (9) (as required) switch; It is 254nm or 365nm exciting light that excitation source sends wavelength, and the light intensity of exciting light is adjusted to suitable light intensity through (2) or (3) adjusting knob, and exciting light is through being shone on the sample stage thing to be detected through probe window by the excitation fiber transmission behind the optically focused; Excite the fluorescent material on the thing to be detected to produce fluorescent radiation; Received and transmission by the reception optical fiber in the probe window again, after receiving optical filtering, be sent to detecting unit, and then entering data handling system (17) is handled; Be connected with computing machine (18) through USB interface (10), the result is shown on the computer screen with data analysis again.If there is fluorescence peak to occur, then this determinand has fluorescent material, if do not have then do not have fluorescent material in the decidable determinand.
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| CN201110141676A CN102323244A (en) | 2011-05-30 | 2011-05-30 | Method for rapidly detecting portable food packaging fluorescent material and device |
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| CN201110141676A CN102323244A (en) | 2011-05-30 | 2011-05-30 | Method for rapidly detecting portable food packaging fluorescent material and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063638A (en) * | 2012-12-27 | 2013-04-24 | 通标标准技术服务(上海)有限公司 | Rapid detection method for fluorescent whitening agent on fabrics |
| CN103278484A (en) * | 2013-05-11 | 2013-09-04 | 徐培实 | Portable fluorescent brightener detector |
| CN104677867A (en) * | 2014-05-29 | 2015-06-03 | 北京工业大学 | Method for indirectly determining concentration of fluorescent substance in permeation flaw detection waste water by measuring COD (Chemical Oxygen Demand) |
| CN104897629A (en) * | 2015-05-15 | 2015-09-09 | 吉林大学 | Method for in-situ detection of migration quantity of fluorescent whitening agent |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063638A (en) * | 2012-12-27 | 2013-04-24 | 通标标准技术服务(上海)有限公司 | Rapid detection method for fluorescent whitening agent on fabrics |
| CN103278484A (en) * | 2013-05-11 | 2013-09-04 | 徐培实 | Portable fluorescent brightener detector |
| CN104677867A (en) * | 2014-05-29 | 2015-06-03 | 北京工业大学 | Method for indirectly determining concentration of fluorescent substance in permeation flaw detection waste water by measuring COD (Chemical Oxygen Demand) |
| CN104677867B (en) * | 2014-05-29 | 2017-04-05 | 北京工业大学 | A kind of method that fluorescent material concentration in penetrant inspection waste water is determined indirectly with measure COD |
| CN104897629A (en) * | 2015-05-15 | 2015-09-09 | 吉林大学 | Method for in-situ detection of migration quantity of fluorescent whitening agent |
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Application publication date: 20120118 |