CN1256585C - Fast detecting test. paper for formaldhyde in air - Google Patents
Fast detecting test. paper for formaldhyde in air Download PDFInfo
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- CN1256585C CN1256585C CN 200410017701 CN200410017701A CN1256585C CN 1256585 C CN1256585 C CN 1256585C CN 200410017701 CN200410017701 CN 200410017701 CN 200410017701 A CN200410017701 A CN 200410017701A CN 1256585 C CN1256585 C CN 1256585C
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- test paper
- formaldehyde
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- encapsulation bag
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Abstract
The present invention relates to test paper for quickly detecting formaldehyde in air, which comprises an encapsulation bag, test paper for detecting formaldehyde and a color comparison card, wherein the test paper for detecting formaldehyde and the color comparison card are arranged in the bag, the middle of the encapsulation bag is provided with an opening, and the back of the encapsulation bag is provided with a paste handle. The test paper is saturated by a color-developing agent prepared by mixing 4-amino-3-hydrazino-5-thiol group-1, 2, 4-triazole solution, potassium hydroxide solution and potassium periodate solution. Each color gradation on the color comparison card indicates the concentration value of formaldehyde and gives the maximum concentration allowed by the national standard. The present invention has the advantage that the concentration of formaldehyde in air is judged by the color change of the test paper because the test paper is exposed in air. The test paper has the advantages of simple use, safe process, sensitive and accurate result, low cost, simple treatment of the used test paper and no secondary pollution to environment.
Description
Technical field
The present invention relates to formaldehyde repid test test paper in a kind of air, be used for air formaldehyde concentration in the disposable sxemiquantitative on-the site analysis measuring cell, and near the formaldehyde that volatilizes the new furniture and fixtures material.Belong to on-the site analysis and detect new product.
Background technology
Formaldehyde (HCHO) claim wooden aldehyde or acetaldehyde again, and 40% formalin is called as formalin solution, is widely used as antiseptic.Formaldehyde is of many uses in chemical industry, is extensive use of in the family by its synthetic product, and as the latex paint in the furniture, the various sheet materials in the fire retardant in the floor, the building materials, antiseptic, coating, sterilizing article etc.If but use excessive and cause that content of formaldehyde exceeds standard in the air, harm that can be serious to healthy generation.
The conventional method of measuring content of formaldehyde in the air is generally used large-scale instrument at present.Its advantage comprises detection sensitivity height, quantitatively accurate.But determination step complexity, need professional operation, mensuration expense height, thereby be difficult for popularizing.Current domestic real estate development rapidly, be necessary to develop a kind of simple to operate, the result is rapid, reliable cheap formaldehyde gas assay method, be convenient to the common people and use voluntarily in the family.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art and actual needs, formaldehyde repid test test paper in a kind of air is provided, differentiate tested air formaldehyde concentration with the test paper change color, easy to use, the result is reliable rapidly.
For realizing such purpose, in the technical scheme of the present invention, adopted the formaldehyde determination test paper that soaks into developer, judge the concentration of formaldehyde in the air by test paper being exposed to the test paper change color that causes in the air.The formaldehyde repid test test paper is disposable use test paper in the air provided by the present invention, comprises formaldehyde determination test paper and colorimetric card in external packing encapsulation bag and the encapsulation bag.Test paper adopts laboratory filter paper or white cotton commonly used, soaks into by 4-amido-3-callosity base-5-mercapto-1,2 4-triazole (AHMT) solution, the developer that potassium hydroxide (KOH) solution and potassium metaperiodate (KIO4) solution mix on the test paper.Test paper immerses in the developer mixed liquor after soaking in ionic strength is the electrolyte of 0.3M earlier again, need not drying be encapsulated in immediately in the enclosed package bag.There is opening at encapsulation bag middle part, and the encapsulation bag has the stickup handle behind.Be attached on the colorimetric card in the product encapsulation dress, each color range is indicated the concentration value of formaldehyde, and concentration unit is mg/M
3, and provide the maximum concentration that national standard allows.
During use, tear the opening at encapsulation bag middle part, moistening test paper is exposed in the tested air, the developer on the test paper produces reaction and the color of test paper is changed to some extent, by comparing, judge tested air formaldehyde concentration with the interior appended colorimetric card of encapsulation bag.Encapsulation bag stickup handle behind can be used for the encapsulation bag is sticked on wall or the furniture in use.
Beneficial effect of the present invention is embodied in:
● operation steps is simple, and several steps of conventional formaldehyde detection method are concentrated on the test paper, does not need large-scale instrument and equipment can finish detection.
● can on-the-spotly accurately measure airborne concentration of formaldehyde, directly on colorimetric card, read measurement result.
● detection speed is fast, measures a sample generally in 3 minutes.
● cheapness, be convenient to the common people and use voluntarily in the family.
● the test paper after the use is handled simple, and all expend just test paper, can not cause secondary pollution to environment.
Description of drawings
Fig. 1 is a formaldehyde repid test test paper structural representation in the air of the present invention.
Among Fig. 1,1 for pasting handle, and 2 is the encapsulation bag as external packing, 3 opening mouths for the encapsulation bag, and 4 is the formaldehyde determination test paper.
(concentration unit is mg/M to Fig. 2 for the present invention measures the interior appended colorimetric card synoptic diagram of test paper encapsulation bag
3).
Embodiment
Below by specific embodiment technical scheme of the present invention is described in further detail.
Formaldehyde repid test test paper structure comprises encapsulation bag 2, the interior formaldehyde determination test paper 4 of encapsulation bag as shown in Figure 1 in the air of the present invention, and there is the mouth of opening 3 at encapsulation bag middle part, and the encapsulation bag has the handle 1 of stickup behind.
Formaldehyde determination test paper 4 adopts filter paper or white cotton commonly used, soaks into the solution by AHMT on the test paper, the developer that potassium hydroxide (KOH) solution and potassium metaperiodate (KIO4) solution mix.
The concrete preparation method of formaldehyde determination test paper 4 is: preparing weight ratio respectively is that 1%AHMT solution, concentration are the KOH solution of 2M and the KIO4 solution of 0.2M, gets 10 milliliters of AHMT solution, 2 milliliters of KOH solution, that 2 milliliters of KIO4 solution mix the back is standby.The preparation ionic strength is the electrolyte solution of 0.3M.Get the paper slip that qualitative filter paper is cut into 10 * 2 centimetres, immerse in the above-mentioned electrolyte solution, and then immerse in the colour developing mixed liquor, take out in the inclosure encapsulation bag stand-by after fully soaking into immediately.
For conveniently reading and the compare test result, in the encapsulation bag, attach colorimetric card, each color range on the colorimetric card is indicated the concentration value (mg/M3) of formaldehyde, and emphasizes the maximum concentration that national standard allows.
During use, select indoor a certain place to measure, close the doors and windows, room air is remained static.The stickup handle 1 of encapsulation bag behind is pasted on furniture or the wall, will encapsulate bag along encapsulation bag opening mouth 3 and raise, formaldehyde determination test paper 4 is exposed in the air to be determined.After leaving standstill 3 minutes, observe the test paper change color, by with colorimetric card colorimetric, the concentration that can read formaldehyde in the tested air.
During test, with test paper apart from floor level more than one meter effect be good.
Claims (2)
1, formaldehyde repid test test paper in a kind of air, it is characterized in that comprising the formaldehyde determination test paper (4) in encapsulation bag (2) and the encapsulation bag, encapsulation bag middle part has seals off mouthful (3), the encapsulation bag has stickup handle (1) behind, the developer that soaks on the formaldehyde determination test paper (4) is 4-amido-3-callosity base-5-mercapto-1 of 1% by weight ratio, 2,4-triazole solution, concentration are the potassium hydroxide solution of 2M and the potassium metaperiodate solution of 0.2M, mix in 10: 2: 2 ratios to form.
2, formaldehyde repid test test paper in the air as claimed in claim 1 is characterized in that having colorimetric card in the described encapsulation bag (2), and each color range on colorimetric card is indicated the concentration value of formaldehyde, and provides the maximum concentration that national standard allows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017701 CN1256585C (en) | 2004-04-15 | 2004-04-15 | Fast detecting test. paper for formaldhyde in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017701 CN1256585C (en) | 2004-04-15 | 2004-04-15 | Fast detecting test. paper for formaldhyde in air |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563954A CN1563954A (en) | 2005-01-12 |
| CN1256585C true CN1256585C (en) | 2006-05-17 |
Family
ID=34479111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410017701 Expired - Fee Related CN1256585C (en) | 2004-04-15 | 2004-04-15 | Fast detecting test. paper for formaldhyde in air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1256585C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770925A (en) * | 2016-12-14 | 2017-05-31 | 蔡璇 | A kind of food formaldehyde quick detection reagent |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5137740B2 (en) * | 2008-08-08 | 2013-02-06 | 日立造船株式会社 | Nondestructive inspection device for oxygen concentration in bag-like containers |
| CN104316516A (en) * | 2014-09-28 | 2015-01-28 | 烟台大学 | Chromic material for detecting reductive gas |
| CN105181690B (en) * | 2015-09-28 | 2018-03-27 | 北京福德安科技有限公司 | A kind of quick colorimetric water quality detecting device of 12 passage miniflows |
| CN111579732A (en) * | 2020-07-07 | 2020-08-25 | 天津浑天科技有限公司 | Natural gas smell identification packaging test paper and preparation method thereof |
| CN114635308B (en) * | 2022-03-28 | 2023-02-17 | 上海希望树生物科技有限公司 | High-aberration formaldehyde detection test paper based on natural pigments |
-
2004
- 2004-04-15 CN CN 200410017701 patent/CN1256585C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770925A (en) * | 2016-12-14 | 2017-05-31 | 蔡璇 | A kind of food formaldehyde quick detection reagent |
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| Publication number | Publication date |
|---|---|
| CN1563954A (en) | 2005-01-12 |
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Granted publication date: 20060517 |