CN101000310A - Method for investigating formol - Google Patents
Method for investigating formol Download PDFInfo
- Publication number
- CN101000310A CN101000310A CN 200710066703 CN200710066703A CN101000310A CN 101000310 A CN101000310 A CN 101000310A CN 200710066703 CN200710066703 CN 200710066703 CN 200710066703 A CN200710066703 A CN 200710066703A CN 101000310 A CN101000310 A CN 101000310A
- Authority
- CN
- China
- Prior art keywords
- formaldehyde
- test solution
- absorbent cotton
- detection agent
- cotton flower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229960004279 formaldehyde Drugs 0.000 title 1
- 235000019256 formaldehyde Nutrition 0.000 title 1
- 229920000742 Cotton Polymers 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001117 sulphuric acid Substances 0.000 claims abstract description 9
- 235000011149 sulphuric acid Nutrition 0.000 claims abstract description 9
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 29
- 239000012085 test solution Substances 0.000 claims description 29
- 241000241602 Gossypianthus Species 0.000 claims description 14
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 2
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 235000013305 food Nutrition 0.000 description 9
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- 244000061458 Solanum melongena Species 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 2
- 231100000315 carcinogenic Toxicity 0.000 description 2
- 239000003183 carcinogenic agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- PHOLIFLKGONSGY-CSKARUKUSA-N (e)-(3-methyl-1,3-benzothiazol-2-ylidene)hydrazine Chemical compound C1=CC=C2S\C(=N\N)N(C)C2=C1 PHOLIFLKGONSGY-CSKARUKUSA-N 0.000 description 1
- 150000005207 1,3-dihydroxybenzenes Chemical class 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 206010067125 Liver injury Diseases 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 231100000045 chemical toxicity Toxicity 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000007102 metabolic function Effects 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- JOVOSQBPPZZESK-UHFFFAOYSA-N phenylhydrazine hydrochloride Chemical compound Cl.NNC1=CC=CC=C1 JOVOSQBPPZZESK-UHFFFAOYSA-N 0.000 description 1
- 229940038531 phenylhydrazine hydrochloride Drugs 0.000 description 1
- 238000003969 polarography Methods 0.000 description 1
- 238000003822 preparative gas chromatography Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses formaldehyde detecting method. It includes the following steps: preparing formaldehyde detecting agent as 0.1-0.4g fuchsine/100ml water to dissolve at 40-80 degree centigrade; orderly adding sulfurous acid or sodium sulfite and concentrated sulphuric acid wit density 80% to make detecting agent with 100/16-20/3-5 volume ratio; putting cotton into the detecting agent to form medicine bearing cotton; putting it into sealing sleeve between piston and pinhead; using pinhead to adsorb detected liquid to make it contact with the cotton; if its color changes, the formaldehyde content is not less than 1ppm. The method of the invention has safe using, high correct rate, especially suits for on-site measurement.
Description
Technical field
The present invention relates to a kind of method that detects formaldehyde.
Background technology
Formaldehyde is that country prohibites the non-food stuff adjuvant that adds in the food.Formaldehyde has very strong reductibility, can be oxidized to formic acid, is cell toxicant; It can damage liver, kidney and nervous centralis, influences the body metabolism function, and carcinogenesis is arranged.The method of measuring formaldehyde at present has acetylacetone method, variable color acid system, AHMT method, phenylhydrazine hydrochloride method, phenol reagent (MBTH) method, oscilloscopic polarography, vapor-phase chromatography, high performance liquid chromatography etc.These method requirement for experiment condition need special laboratory, professional, instrument and relevant reagent than higher, and on-site measurement need be quick, convenient, easy and simple to handle, highly sensitive, so said method all is not suitable for on-site measurement.
Existing a kind of immediate technology CN1437020A discloses a kind of " water is sent out marine product formaldehyde detection agent and pick-up unit thereof ", and its detection agent is by 2 parts of resorcinols and 3 parts of potpourris of forming of NaOH.This kind detection agent has the following disadvantages: resorcinol is owing to possess stronger chemical toxicity, is carcinogenic, sensitization, etiology, therefore can cause great harm to the health of being engaged in this detection tradesman for a long time.Introduced another carcinogenic substance (resorcinol) again when detecting a carcinogenic substance (formaldehyde), this is a kind of way that loses more than gain.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of safe in utilization, accuracy rate is high, is specially adapted to the method for the detection formaldehyde of on-site measurement.
In order to solve the problems of the technologies described above, the invention provides a kind of method that detects formaldehyde, select for use syringe as detecting apparatus, may further comprise the steps:
1), preparation formaldehyde detection agent:, magenta is dissolved in 40～80 ℃ the water according to the ratio of 0.1～0.4g magenta/100ml water; Add sulphurous acid or sodium sulphite and concentration more successively and be 80% the concentrated sulphuric acid, make detection agent, the volume ratio of described water/sulphurous acid or sodium sulphite/concentrated sulphuric acid is 100/16～20/3～5;
2), cotton is put into above-mentioned detection agent dipping back and form band absorbent cotton flower;
3), will put into airtight sleeve between piston and the syringe needle with the absorbent cotton flower;
4), utilize syringe needle to suck test solution, test solution is contacted with being with the absorbent cotton flower; Band absorbent cotton flower variable color person, content of formaldehyde 〉=1ppm in the test solution.
The method of detection formaldehyde of the present invention, selecting magenta, sulphurous acid (or sodium sulphite) and concentration for use is that 80% the concentrated sulphuric acid is made detection agent as raw material.Because magenta be common indicator, sulphurous acid is the adjuvant of the food utmost point (can use in the instant food), and sulfuric acid neither carcinogenic, pathogenic, sensitizer, so detection agent used in the present invention is harmless substantially to human body, has guaranteed the safety of use.
The method of detection formaldehyde of the present invention can realize the on-site measurement of formaldehyde fast, easily, can learn testing result after the general 30 seconds kinds, and the determination efficiency height, measure highly sensitive; Can be widely used in the residual situation of formaldehyde in the on-site measurement foodstuff test solution.Use detection method of the present invention, when concentration of formaldehyde 〉=1ppm in the test solution (mg/kg or mcg/ml), band absorbent cotton flower is positive, and promptly is with the absorbent cotton flower to become aubergine; Along with the rising of concentration of formaldehyde in the test solution, the color of band absorbent cotton flower is deepened gradually; When concentration of formaldehyde in the test solution＜1ppm, band absorbent cotton flower does not change color.Use detection method of the present invention, can know fast in the test solution concentration of formaldehyde whether 〉=1ppm, and the maloperation phenomenon can not take place.Find that through control test when only containing methyl alcohol, ethanol, acetaldehyde in the test solution, band absorbent cotton flower can not change color.
Since general in food actual formaldehyde amount of adding all greater than this concentration of 1ppm, for example fermented wine hygienic standard " in the content of formaldehyde that allows of regulation be 2mg/L; Therefore the sensitivity of this method meets the needs of the preliminary fast detecting of food fully.
Detection method of the present invention selects for use common syringe (for example disposable syringe) as detecting apparatus; Not only can reduce use cost, can also be easy to carry; Therefore can be widely used in functional government departments, health system, collective, family and individual, realize promoting the use of on a large scale.Use detection method of the present invention, owing to need to use liquid; Therefore can earlier the solid kind article be dissolved or be immersed in and form test solution in the water.Detection method of the present invention can satisfy the field quick detection of formaldehyde in food residual quantities such as water-soaked food, flour, dry fruit, and fully guarantee precision of test result.
In order to prove the accuracy of detection method of the present invention, the inventor has done following contrast experiment: choosing to soak respectively has the liquid of water-soaked food A, B and C as test solution A, test solution B and test solution C.Select spectrophotometry for use, learn: the concentration of formaldehyde of test solution A is 0.5ppm, and the concentration of formaldehyde of test solution B is 1.2ppm, and the concentration of formaldehyde of test solution C is 2.3ppm.Then, with method of the present invention test solution A, test solution B and test solution C are detected respectively; The result shows: test solution A nondiscolouring, and test solution B presents aubergine, and test solution C presents royal purple.
Description of drawings
Fig. 1 is the structural representation of the syringe selected for use of the present invention.
Embodiment
As a kind of prior art, as shown in Figure 1, concrete structure is as follows as the syringe that detects apparatus:
Be provided with piston 4 in the sleeve 1, piston 4 slides with the inner wall sealing ground of sleeve 1 and links to each other.One end of pipe bolt 2 links to each other with piston 4, and the other end links to each other with handle 3.The tip of syringe needle 5 is fitted with plug 7.Whole syringe needle 5 and plug 7 all are positioned at pinhead sleeve 8, accept the protection of pinhead sleeve 8.
Embodiment 1, a kind of method that detects formaldehyde, carry out following steps successively:
1), preparation formaldehyde detection agent: in the 100ml temperature is 50 ℃ hot water, put into the 0.2g magenta, add sulphurous acid 20ml, concentration more successively and be 80% concentrated sulphuric acid 4ml, make detection agent.
2), cotton is put into above-mentioned detection agent dipping back formation band absorbent cotton and spend 6.
3) extract piston 4, earlier, will be with absorbent cotton to spend 6 to put into sleeve 1, then with piston 4 reinstalls; Band absorbent cotton is spent in 6 the airtight sleeves 1 between piston 4 and syringe needle 5.
4) take off pinhead sleeve 8 and plug 7, successively, syringe needle 5 is inserted in the test solutions, the handle 3 of pulling back, pipe bolt 2 drives pistons 4 and moves backward, relies on negative pressure that test solution is sucked in the sleeve 1, makes test solution spend 6 to contact and carry out chemical reaction with being with absorbent cotton.After 30 seconds, can spend 6 chromogenic reaction situation by observation band absorbent cotton; If band absorbent cotton flower presents purple, content of formaldehyde 〉=1ppm in the test solution just is described.
Embodiment 2, a kind of method that detects formaldehyde, carry out following steps successively:
1), preparation formaldehyde detection agent: in the 100ml temperature is 40 ℃ hot water, put into the 0.4g magenta, add sodium sulphite 16ml, concentration more successively and be 80% concentrated sulphuric acid 3ml, make detection agent.
All the other steps are with embodiment 1.
Embodiment 3, a kind of method that detects formaldehyde, carry out following steps successively:
1), preparation formaldehyde detection agent: in the 100ml temperature is 80 ℃ hot water, put into the 0.1g magenta, add sodium sulphite 18ml, concentration more successively and be 80% concentrated sulphuric acid 5ml, make detection agent.
All the other steps are with embodiment 1.
At last, it is also to be noted that what more than enumerate only is several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (1)
1, a kind of method that detects formaldehyde selects for use syringe as detecting apparatus, it is characterized in that may further comprise the steps:
1), preparation formaldehyde detection agent:, magenta is dissolved in 40～80 ℃ the water according to the ratio of 0.1～0.4g magenta/100ml water; Add sulphurous acid or sodium sulphite and concentration more successively and be 80% the concentrated sulphuric acid, make detection agent, the volume ratio of described water/sulphurous acid or sodium sulphite/concentrated sulphuric acid is 100/16～20/3～5;
2), cotton is put into above-mentioned detection agent dipping back and form band absorbent cotton flower;
3), will put into airtight sleeve between piston and the syringe needle with the absorbent cotton flower;
4), utilize syringe needle to suck test solution, test solution is contacted with being with the absorbent cotton flower; Band absorbent cotton flower variable color person, content of formaldehyde 〉=1ppm in the test solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710066703 CN101000310A (en) | 2007-01-15 | 2007-01-15 | Method for investigating formol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710066703 CN101000310A (en) | 2007-01-15 | 2007-01-15 | Method for investigating formol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101000310A true CN101000310A (en) | 2007-07-18 |
Family
ID=38692368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710066703 Pending CN101000310A (en) | 2007-01-15 | 2007-01-15 | Method for investigating formol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101000310A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175671A (en) * | 2010-12-22 | 2011-09-07 | 北京理工大学 | Schiff's reagent suitable for fast measuring formaldehyde in indoor air of family |
| CN101539525B (en) * | 2009-04-21 | 2012-03-07 | 中国科学院长春应用化学研究所 | Method for measuring formaldehyde in aqueous solution by electrochemical luminescence of terpyridyl ruthenium |
| CN102507560A (en) * | 2011-11-08 | 2012-06-20 | 湖北兴发化工集团股份有限公司 | Method for measuring formaldehyde content in tetrakis hydroxymethyl phosphonium sulfate |
| CN103149203A (en) * | 2013-02-27 | 2013-06-12 | 福建中烟工业有限责任公司 | Method for quickly determining formaldehyde content in cigarette wrapping material |
| CN105044002A (en) * | 2015-06-30 | 2015-11-11 | 苏州东辰林达检测技术有限公司 | Formaldehyde detection reagent and preparation method thereof |
| CN105181410A (en) * | 2015-09-23 | 2015-12-23 | 重庆紫光化工股份有限公司 | Method for determining formaldehyde content in N-hydroxymethyl methionine calcium product |
| CN106841193A (en) * | 2017-01-27 | 2017-06-13 | 广州能源检测研究院 | A kind of method that the preparation method and application of test solution test solution tests concentration of formaldehyde |
-
2007
- 2007-01-15 CN CN 200710066703 patent/CN101000310A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539525B (en) * | 2009-04-21 | 2012-03-07 | 中国科学院长春应用化学研究所 | Method for measuring formaldehyde in aqueous solution by electrochemical luminescence of terpyridyl ruthenium |
| CN102175671A (en) * | 2010-12-22 | 2011-09-07 | 北京理工大学 | Schiff's reagent suitable for fast measuring formaldehyde in indoor air of family |
| CN102507560A (en) * | 2011-11-08 | 2012-06-20 | 湖北兴发化工集团股份有限公司 | Method for measuring formaldehyde content in tetrakis hydroxymethyl phosphonium sulfate |
| CN103149203A (en) * | 2013-02-27 | 2013-06-12 | 福建中烟工业有限责任公司 | Method for quickly determining formaldehyde content in cigarette wrapping material |
| CN105044002A (en) * | 2015-06-30 | 2015-11-11 | 苏州东辰林达检测技术有限公司 | Formaldehyde detection reagent and preparation method thereof |
| CN105181410A (en) * | 2015-09-23 | 2015-12-23 | 重庆紫光化工股份有限公司 | Method for determining formaldehyde content in N-hydroxymethyl methionine calcium product |
| CN106841193A (en) * | 2017-01-27 | 2017-06-13 | 广州能源检测研究院 | A kind of method that the preparation method and application of test solution test solution tests concentration of formaldehyde |
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