CN1487296A - Test paper for fast detecting formaldehyde content in aquatic product without interference from protein - Google Patents
Test paper for fast detecting formaldehyde content in aquatic product without interference from protein Download PDFInfo
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- CN1487296A CN1487296A CNA031783503A CN03178350A CN1487296A CN 1487296 A CN1487296 A CN 1487296A CN A031783503 A CNA031783503 A CN A031783503A CN 03178350 A CN03178350 A CN 03178350A CN 1487296 A CN1487296 A CN 1487296A
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Abstract
The test paper for fast detecting formaldehyde content in aquatic product is prepared with common test paper and through cutting into strip, soaking in the reagent for 2 min, lightproof drying at room temperature and is lightproof stored. Of the reagent solution, each 100 ml contains acetylacetone in 0.5-2 ml and ammonum acetate 15-50 g. When the test paper is used, the test paper is soaked or dipped in soaking liquid of aquatic product or the soaking liquid is dropped to the test paper, and when the soaking liquid contains formaldehyde over 30 ppm, the wet test paper will change its color from white to yellow quickly with the color changing time decreasing with the increased formaldehyde content. Compared with standard color card may judge the concentration range of formaldehyde. The advantages includes no interference on detection from protein, simple test paper storing condition and fast detection.
Description
Affiliated field
The present invention relates to a kind of fast qualitative and detect test paper and the detection method that water is sent out formaldehyde in product or the aquatic products, belong to the food hygiene detection field.
Background technology
Formaldehyde (formaldehyde, CH
2O), normal temperature is the gas colourless, that pungent sharp aroma is arranged down. Boiling point is-19.5 ℃; Fusing point is-92 ℃; Relative density is 0.815; Vapour pressure is 1.3kPa (88.0 ℃); Multiple organic solvents such as soluble in water and ethanol reach as high as 55% at the aqueous solution concentration of formaldehyde.
Formaldehyde is a kind of protoplasm poison, and is very harmful to human body, absorbs the digestion that a small amount of formaldehyde can stop gastric enzyme and pancreatin, influences metabolism.The lean solution of formaldehyde can make tenuigenin generation irreversible coagulation, makes meronecrosis at last.Formaldehyde is cell toxicant, and zoopery has proved formalin induce dna infringement in vitro, the cell transformation of chromosome aberration, sudden change and some animal.
Country prohibites formaldehyde is added in the food.But use formalin to soak water and send out product or aquatic products, can make the food hardening moulding of increase, volume does not bounce back, and keeps higher water percentage, increases the toughness and the crisp sense of food, and certain antisepsis is arranged.Market at home is to obtain bigger profit at present, food especially water to send out the phenomenon of illegal use formaldehyde in product or the aquatic products more serious, that gives consumers in general healthyly brings great threat.Therefore water pollution and the monitoring problem of sending out trace formaldehyde in product or the aquatic products caused people's attention.
According to the physicochemical property of formaldehyde, measuring the formaldehyde mature methods has the chromotropic acid colourimetry, diacetone colourimetry, phenol reagent process, vapor-phase chromatography etc.But these methods or the relatively large instrument auxiliary measuring of needs, or more loaded down with trivial details, the consumption subject is big, and testing result lags behind, and can not adapt to the requirement that water is sent out formaldehyde field quick detection in product or the aquatic products.So water is sent out, and the qualitative fast detection method research of formaldehyde has large market prospect and economical, societal benefits in product or the aquatic products.
On June 14th, 2000, Patent Office of the People's Republic of China discloses a kind of patented claim that is used to detect test paper, test solution and the detection method thereof of formaldehyde, methyl alcohol composition, and its application number is 99117400.3.The test paper of this patented claim is to be that Dick's reagent soaks back drying under the cryogenic vacuum condition and makes in Schiff's reagent or class.During detection, test paper is put into tested reagent, treat to take out and the comparison of standard colorimetric batten after the test paper variable color.This method has fast, convenient and lower-price characteristic, but have wretched insufficiency, promptly this test paper is applied to formaldehyde when check that water is sent out product or aquatic products, is subjected to the serious interference of protein, and can't correctly show its reaction color, have influence on the sensitivity and the accuracy of testing result; Conventional acetylacetone method detects formaldehyde, and required reagent is made up of diacetone, ammonium acetate and glacial acetic acid, and is very fast with formaldehyde reaction speed, interference that can anti-protein, but adopt the test paper of this reagent preparation, there is not chromogenic reaction with formaldehyde, therefore, this reagent can not be used for preparing test paper.
Summary of the invention
Purpose of the present invention and task are to overcome the deficiencies in the prior art: because of being subjected to the interference of protein, can't correctly show reaction color when (1) is applied to water and sends out in product or the aquatic products formaldehyde and detect, make the range of application of test paper limited; (2) sensitivity of testing result and validity reduce, and provide a kind of fast detecting water that not disturbed by protein to send out the test paper of formaldehyde composition in product or the aquatic products and the reagent of preparation test paper, and the spy proposes technical solution of the present invention.
Basic design of the present invention is to have considered following characteristic: protein does not have chromogenic reaction to diacetone and ammonium acetate; It is noiseless that protein detects formaldehyde to acetylacetone method; By studies show that of preparation test paper, the test paper of the reagent preparation that application diacetone and ammonium acetate are made into and the color developing effect of formaldehyde are significantly better than the test paper of the reagent preparation that is made into by diacetone, ammonium acetate and glacial acetic acid, therefore the reagent composition of determining the preparation test paper is diacetone and ammonium acetate, rather than diacetone, ammonium acetate and glacial acetic acid.
The present invention proposes be not subjected to protein disturb fast detecting water send out or aquatic products in the test paper of formaldehyde composition, it is characterized in that: it is that common test paper is cut into strip, be infiltrated on fully by diacetone, the aqueous solution reagent that ammonium acetate is formed 2 minutes, take out back dry white test paper that forms under room temperature lucifuge condition, the lucifuge sealing is preserved rapidly: diacetone, the aqueous solution agent prescription that ammonium acetate is formed is in every 100ml solution, contain diacetone 0.5ml-2ml, ammonium acetate 15-50g, optimum agent prescription is in every 100ml solution, contain diacetone 2ml, ammonium acetate 50g; Use the method for test paper of the present invention to be, get the white test paper that makes, it is immersed water sends out in the soak solution of product or aquatic products, or water sent out product or the aquatic products soak solution drips on the test paper, or dip in the soak solution that product or aquatic products are sent out in water intaking with test paper, if concentration of formaldehyde is greater than 30ppm in the soak solution, white test paper wetted portions is flavescence, can judge the concentration range of formaldehyde in the soak solution with the standard color card comparison.It is further characterized in that: white test paper wetted portions changes yellow degree into by white, relevant with the concentration of formaldehyde in the soak solution, when concentration of formaldehyde is greater than 100ppm in the soak solution, the test paper displaing yellow, concentration of formaldehyde is when 50 arrive 100ppm, it is light yellow that test paper shows, concentration of formaldehyde is when 30 arrive 50ppm, and it is faint yellow that test paper shows, and the test paper color development time will reduce along with the increase of concentration of formaldehyde in the soak solution, concentration of formaldehyde is when 30 arrive 50ppm, the test paper color development time shortened to 2 minutes by 3 minutes, and concentration of formaldehyde is when 50 arrive 100ppm, and the test paper color development time shortened to 30 seconds by 2 minutes, concentration of formaldehyde is during greater than 100ppm, and the test paper color development time is no more than 30 seconds.
Studies show that acetylacetone method detects formaldehyde, required reagent is made up of diacetone, ammonium acetate and glacial acetic acid.Wherein, diacetone and formaldehyde can not react separately, and ammonium acetate is that reaction is necessary, but glacial acetic acid to reaction not necessarily.Faster than the reaction of reagent that does not add glacial acetic acid and formaldehyde by the reagent that diacetone, ammonium acetate and glacial acetic acid are made into the reaction velocity of formaldehyde, this is because the adding of glacial acetic acid has suppressed the hydrolysis of ammonium acetate, the existence of ammonium radical ion in the guarantee reagent: ammonium acetate is attached to facile hydrolysis not on the test paper.By studies show that of preparation test paper, therefore the test paper of the reagent preparation that application diacetone and ammonium acetate are made into and the color developing effect of formaldehyde determine that significantly better than the test paper of the reagent preparation that is made into by diacetone, ammonium acetate and glacial acetic acid the reagent composition of preparation test paper is diacetone and ammonium acetate.
Strengthen reactant concentration and can increase reaction velocity.But reagent concentration is not the bigger the better.Because under high concentration, join reagent itself and just present certain faint yellowly, it is faint yellow that the test paper of making like this presents, and can't correctly detect formaldehyde.Comprehensive above experimental result, the dosage range of preparation test paper agents useful for same is: in every 100ml solution, contain diacetone 0.5ml-2ml, ammonium acetate 15-50g, optimum agent prescription are in every 100ml solution, contain diacetone 2ml, ammonium acetate 50g.
During the preparation test paper, consider that common test paper all is rectangular, the test paper of this research preparation adopts rectangle.
By the physico-chemical property of diacetone (boiling point lower, be subjected to the light time to change into brown liquid) as can be known test paper need the lucifuge sealing to preserve, otherwise test paper will lose efficacy because of the volatilization of diacetone.
Proposed by the invention be not subjected to protein disturb fast detecting water send out or aquatic products in the test paper and the using method thereof of formaldehyde composition, the detection lower limit of PARA FORMALDEHYDE PRILLS(91,95) reaches 30ppm.
Description of drawings
Fig. 1 is the standard color card that the present invention proposes.
The different concentration of formaldehyde scopes of the corresponding test of different colours in the colour atla.
Advantage of the present invention is that (1) is not subjected to the wherein interference of contained protein when detecting in Water soaking products or the aquatic products formaldehyde; (2) the test paper drying condition is room temperature lucifuge drying, does not need the cryogenic vacuum condition; (3) directly field test, speed is fast, Using method is simple and convenient.
Embodiment
Embodiment 1
The law enfrocement official of Dalian xx office checks the waterishlogged Stichopus japonicus of selling in the market of farm produce, adopt the technology of the present invention field quick detection formaldehyde.Entrained test paper is previously prepared, promptly adopt common test paper to be cut into strip, be infiltrated on fully in every 100ml solution and contain diacetone 0.5ml, the aqueous solution reagent of ammonium acetate 15g 2 minutes, take out back drying under room temperature lucifuge condition and form white test paper, the lucifuge sealing is preserved rapidly.
At the scene of selling, the law enfrocement official gets drop and is added on the rectangular test paper that takes out from the lucifuge sealing packaging box from the sea cucumber soak solution, and test paper is yellow after about 20 seconds, compares with standard color card, and concentration of formaldehyde should be greater than 100ppm.Adopt the GB detection by quantitative, this soak solution concentration of formaldehyde is 180ppm, and the result conforms to detection paper.Show that this waterishlogged Stichopus japonicus is soaked by formaldehyde, the law enfrocement official orders the retailer to stop to sell this sea cucumber.
Embodiment 2
The law enfrocement official of xx office checks the peeled shrimp of selling in xx market, adopt the technology of the present invention field quick detection formaldehyde.Entrained test paper prepares in advance, promptly adopts common test paper to be cut into strip, be infiltrated on fully in every 100ml solution to contain diacetone 1ml, ammonium acetate 30g reagent 2 minutes, take out back drying under room temperature lucifuge condition and form white test paper, the lucifuge sealing is preserved rapidly.
At the scene of selling, the law enfrocement official takes out rectangular test paper from the lucifuge sealing packaging box, in the peeled shrimp soak solution, dip in and get, test paper is light yellow after about 1 minute, compare with standard color card, concentration of formaldehyde should adopt the GB detection by quantitative between 50ppm-100ppm, this soak solution concentration of formaldehyde is 80ppm, and the result conforms to detection paper.Show that this peeled shrimp is soaked by formaldehyde, the law enfrocement official orders the retailer to stop to sell this peeled shrimp.
Embodiment 3
The law enfrocement official of xx office checks the blinds of selling in market, adopt the technology of the present invention field quick detection formaldehyde.Entrained test paper prepares in advance, promptly adopts common test paper to be cut into strip, be infiltrated on fully in every 100ml solution to contain diacetone 2ml, ammonium acetate 50g reagent 2 minutes, take out back drying under room temperature lucifuge condition and form white test paper, the lucifuge sealing is preserved rapidly.
At the scene of selling, the law enfrocement official takes out rectangular test paper from the lucifuge sealing packaging box, in the blinds soak solution, immerse, test paper is faint yellow after about 3 minutes, compare with standard color card, concentration of formaldehyde should adopt the GB detection by quantitative between 30ppm-50ppm, this soak solution concentration of formaldehyde is 45ppm, and the result conforms to detection paper.The result shows that this blinds is soaked by formaldehyde, and the law enfrocement official orders this retailer to stop to sell this blinds.
Embodiment 4
The law enfrocement official of xx office checks the tendons of beef, mutton or pork of selling in xx market, adopt the technology of the present invention field quick detection formaldehyde.Entrained test paper prepares in advance, promptly adopts common test paper to be cut into strip, be infiltrated on fully in every 100ml solution to contain diacetone 2ml, ammonium acetate 50g reagent 2 minutes, take out back drying under room temperature lucifuge condition and form white test paper, the lucifuge sealing is preserved rapidly.
Selling on-the-spotly, the law enfrocement official takes out rectangular test paper from the lucifuge sealing packaging box, in tendons of beef, mutton or pork soak solution, dip in and get, the test paper nondiscolouring, the test paper test result shows that these tendons of beef, mutton or pork are not soaked by formaldehyde, perhaps in the soak solution concentration of formaldehyde less than 30ppm.Adopt the GB detection by quantitative, formaldehydeless in this soak solution, the result conforms to detection paper.Show and do not contain formaldehyde in the tendons of beef, mutton or pork.The consumer can relievedly eat.
Claims (5)
1, be not subjected to protein disturb fast detecting water send out or aquatic products in the test paper of formaldehyde composition, it is characterized in that: common test paper is cut into strip, soak into fully the aqueous solution reagent of forming by diacetone-ammonium acetate 2 minutes, take out back drying under room temperature lucifuge condition and form white test paper, the lucifuge sealing is preserved rapidly.
2, make claim 1 described be not subjected to protein disturb fast detecting water send out or aquatic products in the test paper of the formaldehyde composition aqueous solution reagent that adopts diacetone-ammonium acetate to form, it is characterized in that: agent prescription is in every 100ml aqueous solution, contain diacetone 0.5ml-2ml, ammonium acetate 15-50g; Optimum agent prescription is in every 100ml solution, contains diacetone 2ml, ammonium acetate 50g.
3, use one of claim 1-2 described be not subjected to protein disturb fast detecting water send out or aquatic products in the method for test paper of formaldehyde composition, it is characterized in that: the white test paper that will make immerses water to be sent out in the soak solution of product or aquatic products; Or water sent out product or the aquatic products soak solution drips on the test paper; Or dip in the soak solution that product or aquatic products are sent out in water intaking with test paper, when concentration of formaldehyde in the soak solution during greater than 30ppm, white test paper wetted portions is flavescence, relatively judges the concentration range of formaldehyde in the soak solution with standard color card.
4, use claim 3 described be not subjected to protein disturb fast detecting water send out or aquatic products in the method for test paper of formaldehyde composition, it is characterized in that: white test paper wetted portions changes yellow degree into by white, relevant with the concentration of formaldehyde in the soak solution, when concentration of formaldehyde is greater than 100ppm in the soak solution, the test paper displaing yellow; Concentration of formaldehyde is when 50 arrive 100ppm, and it is light yellow that test paper shows; Concentration of formaldehyde is when 30 arrive 50ppm, and it is faint yellow that test paper shows.
5, use claim 3 or 4 described be not subjected to protein disturb fast detecting water send out or aquatic products in the method for test paper of formaldehyde composition, it is characterized in that: the test paper color development time reduces along with the increase of concentration of formaldehyde in the soak solution, concentration of formaldehyde is when 30 arrive 50ppm, and the test paper color development time shortened to 2 minutes by 3 minutes; Concentration of formaldehyde is when 50 arrive 100ppm, and the test paper color development time shortened to 30 seconds by 2 minutes; Concentration of formaldehyde is during greater than 100ppm, and the test paper color development time is no more than 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03178350 CN1228630C (en) | 2003-07-14 | 2003-07-14 | Test paper for fast detecting formaldehyde content in aquatic product without interference from protein |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03178350 CN1228630C (en) | 2003-07-14 | 2003-07-14 | Test paper for fast detecting formaldehyde content in aquatic product without interference from protein |
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| Publication Number | Publication Date |
|---|---|
| CN1487296A true CN1487296A (en) | 2004-04-07 |
| CN1228630C CN1228630C (en) | 2005-11-23 |
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| CN 03178350 Expired - Fee Related CN1228630C (en) | 2003-07-14 | 2003-07-14 | Test paper for fast detecting formaldehyde content in aquatic product without interference from protein |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008072112A1 (en) * | 2006-12-14 | 2008-06-19 | Kimberly-Clark Worldwide, Inc. | Detection of formaldehyde in urine samples |
| CN102353673A (en) * | 2011-09-30 | 2012-02-15 | 哈尔滨工业大学 | Formaldehyde test paper and preparation method thereof |
| CN104359902A (en) * | 2014-11-13 | 2015-02-18 | 上海应用技术学院 | Formaldehyde colour-rendering test paper, and preparation method and application thereof |
-
2003
- 2003-07-14 CN CN 03178350 patent/CN1228630C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008072112A1 (en) * | 2006-12-14 | 2008-06-19 | Kimberly-Clark Worldwide, Inc. | Detection of formaldehyde in urine samples |
| US8012761B2 (en) | 2006-12-14 | 2011-09-06 | Kimberly-Clark Worldwide, Inc. | Detection of formaldehyde in urine samples |
| CN102353673A (en) * | 2011-09-30 | 2012-02-15 | 哈尔滨工业大学 | Formaldehyde test paper and preparation method thereof |
| CN104359902A (en) * | 2014-11-13 | 2015-02-18 | 上海应用技术学院 | Formaldehyde colour-rendering test paper, and preparation method and application thereof |
| CN104359902B (en) * | 2014-11-13 | 2017-05-03 | 上海应用技术学院 | Formaldehyde colour-rendering test paper, and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1228630C (en) | 2005-11-23 |
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