CN202404030U - Detecting card capable of quickly detecting formaldehyde in air at multiple points - Google Patents
Detecting card capable of quickly detecting formaldehyde in air at multiple points Download PDFInfo
- Publication number
- CN202404030U CN202404030U CN2011205563160U CN201120556316U CN202404030U CN 202404030 U CN202404030 U CN 202404030U CN 2011205563160 U CN2011205563160 U CN 2011205563160U CN 201120556316 U CN201120556316 U CN 201120556316U CN 202404030 U CN202404030 U CN 202404030U
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- support plate
- formaldehyde
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- detecting card
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Abstract
The utility model discloses a detecting card capable of quickly detecting formaldehyde in air at multiple points. The detecting card comprises a first support plate (1), a second support plate (2), a detecting card body (3), a testing window (4) and a handle (5), the first support plate (1) is provided with a counter bored hole, the second support plate (2) is provided with a convex cylinder, the first support plate (1) and the second support plate (2) are fixed together, the detecting card body (3) is arranged in an internal space formed by the first support plate (1) and the second support plate (2), the handle (5) is arranged at one end of the first support plate (1), and a through hole used as the testing window (4) is drilled on the second support plate (2). The color development speed is fast, the concentration of the formaldehyde can be determined within 3-15 minutes, sensitivity is high, environmental interference is low, level difference is particularly obvious nearby the standard concentration specified by national standards, multi-point detection is realized, and the detecting card is convenient in operation, low in manufacturing cost, cheap in price and easy in industrial production, and is simple and feasible.
Description
Technical field
The utility model relates to the test card that a kind of multiple spot fast detects formaldehyde in the air, is the new product that is used for on-the-spot semiquantitative detection concentration of formaldehyde.
Background technology
Formaldehyde has become the main factor of room air pollution at present, enjoys public attention in recent years.Formaldehyde has the intense stimulus effect to skin and mucous membrane, and the formaldehyde of high concentration is all toxic to nervous system, immune system, liver etc.Long-term low dose contact formaldehyde will reduce the immunity of organism level, causes neurasthenia, symptoms such as drowsiness, failure of memory occur.Therefore, fast detecting formaldehyde pollutes for control formaldehyde, and the protection people are healthy, have good social effect.
The conventional method that accurately detects content of formaldehyde in the air at present is to detect through analytical instrument, or adopts AAS according to GB, has quantitatively advantage accurately.But measuring process is complicated, cost is high, can not adapt to common people's demand.
The method that semiquantitative formaldehyde detects is more existing reports in some patent documentations; The employing Liquid Absorption liquid form that has; Employing prod that has or test paper form; But its test philosophy all is to adopt the AHMT colourimetry, all exists shortcomings such as color range is not obvious, reagent is unstable, sxemiquantitative weak effect during use, is difficult to develop real effectively product.
At present on the market the formaldehyde box product of testing oneself is liquid-absorbant mostly, adopts 3-methyl-2-[4-morpholinodithio quinoline ketone hydrazone hydrochloride hydrate (being called for short MBTH), though color range is obvious, sxemiquantitative is effective; But all need prepare absorption liquid, add the developer initiating agent behind the absorption formaldehyde, leave standstill colour developing; Carry out the colorimetric reading again, complex operation, consuming time longer; Generally need (30～35) min, use inconvenience.And this formaldehyde box product of testing oneself all is disposable, can only test the concentration of formaldehyde of a point, can't satisfy the situation that the multi-point sampler demand is arranged.
The utility model content
This novel purpose provides a kind of quick, multiple spot concentration of formaldehyde test card.
A kind of can be fast, multiple spot detects the test card of formaldehyde in the air, comprises first back up pad (1), second back up pad (2), test card (3), testing window (4), handle (5); First back up pad (1) is provided with counterbore; Second back up pad (2) is provided with the cylinder of projection; First back up pad (1), second back up pad (2) are fixed together; Its inner space holds test card (3), and an end of first back up pad (1) is provided with handle (5), and second back up pad (2) excavation, one through hole is as testing window (4).
During use the formaldehyde initiating agent that develops the color is dropped on the testing window of test card, let the reaction enrichment of formaldehyde and colour developing carry out synchronously, improved sensitivity; Shortened the test duration; The test speed that improves greatly can be confirmed the concentration of formaldehyde value with test card color and colorimetric card contrast in (3～15) min.
One cover has many group back up pads and test card in the product, independent packaging respectively, and every group of back up pad and test card can be tested the concentration of formaldehyde of a point, the environment that the multiple spot of satisfying the demand detects, this utility model uses very flexibly, conveniently.
Described colorimetric card be with the actual measurement after the test card color as colour code, the shade of test card is determined by concentration of formaldehyde, along with concentration of formaldehyde increases, carries out the transition to green, blueness by yellow, on the colorimetric card concentration of formaldehyde and colour code one by one the correspondence.
The beneficial effect of the utility model:
1, color speed is fast, can confirm concentration of formaldehyde in (3～15) min;
2, highly sensitive, receive environmental disturbances few, particularly near the concentration up to standard of GB regulation, the color range obvious difference;
3, multiple spot detection, easy row convenient and simple for operation;
4, cost of manufacture is lower, and is cheap;
5, be easy to suitability for industrialized production.
Description of drawings
Fig. 1 is the exploded view of formaldehyde test card.
1, first back up pad; 2, second back up pad; 3, test card; 4, testing window; 5, handle
Embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
With reference to figure 1, a kind of multiple spot fast detects the test card of formaldehyde in the air, comprises first back up pad 1; Second back up pad 2; Test card 3; Testing window 4, handle 5; First back up pad 1 is provided with counterbore, and second back up pad is provided with the cylinder of projection, utilizes this counterbore and cylinder with first back up pad 1; Second back up pad 2 is fixed together, and the end that its inner space holds test card 3, the first back up pads 1 is provided with handle 5, the second back up pads 2 excavations one through hole as testing window 4.
The preparation method of said test card:
Coarse strainer is cut into rectangular according to the back up pad groove size; Through dipping, dry step MBTH loaded on the white filter screen, charge capacity 0.5mg/cm2～0.6mg/cm2 is fixed on the filter screen of load MBTH on the back up pad; Promptly make test card, test card is put into sealing bag and is preserved.
Method of application:
During use test card is taken out in sealing bag; Drip 2～3 colour developing initiating agents with reagent bottle and (can adopt the acid solution that contains ferric ion; Can be the WS of ferric sulphate, ferric nitrate, ferric trichloride or ammonium ferric sulfate, solution concentration be that 0.01mol/L is between the saturated solution) to testing window 4, be exposed in the environment of concentration of formaldehyde to be tested; Place or shake gently with increase with air contact (3～15) min observations.
The result judges: (3～15) min observations, with the colorimetric card comparison, confirm air formaldehyde concentration.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model accompanying claims according to above-mentioned explanation.
Claims (1)
- One kind can be fast, multiple spot detects the test card of formaldehyde in the air, it is characterized in that, comprises first back up pad (1), second back up pad (2), test card (3), testing window (4), handle (5); First back up pad (1) is provided with counterbore; Second back up pad (2) is provided with the cylinder of projection; First back up pad (1), second back up pad (2) are fixed together; Its inner space holds test card (3), and an end of first back up pad (1) is provided with handle (5), and second back up pad (2) excavation, one through hole is as testing window (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205563160U CN202404030U (en) | 2011-12-28 | 2011-12-28 | Detecting card capable of quickly detecting formaldehyde in air at multiple points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205563160U CN202404030U (en) | 2011-12-28 | 2011-12-28 | Detecting card capable of quickly detecting formaldehyde in air at multiple points |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202404030U true CN202404030U (en) | 2012-08-29 |
Family
ID=46701670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205563160U Expired - Lifetime CN202404030U (en) | 2011-12-28 | 2011-12-28 | Detecting card capable of quickly detecting formaldehyde in air at multiple points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202404030U (en) |
-
2011
- 2011-12-28 CN CN2011205563160U patent/CN202404030U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |