CN105352950A - Detection medicament and method for rapid detection of formaldehyde content in air - Google Patents
Detection medicament and method for rapid detection of formaldehyde content in air Download PDFInfo
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- CN105352950A CN105352950A CN201510708282.5A CN201510708282A CN105352950A CN 105352950 A CN105352950 A CN 105352950A CN 201510708282 A CN201510708282 A CN 201510708282A CN 105352950 A CN105352950 A CN 105352950A
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Abstract
The invention discloses a detection medicament and method for rapid detection of formaldehyde content in air. The detection medicament is characterized by including the following raw materials by weight: 0.005%-5% of a detection powder containing a phenol reagent, 0.05%-10% of a chromogenic powder containing ammonium ferric sulfate powder and 80%-100% of a detection liquid containing water. The detection medicament is simple for preparation and has long shelf life; the detection method is simple, and can detect the indoor formaldehyde concentration without using special equipment or high level skill; and the formaldehyde concentration detection result can be obtained quickly through color comparison. The detection medicament is very convenient for use.
Description
Technical field
The present invention relates to Detection of Air Quality technical field, relate to a kind of test agents and the method that can detect content of formaldehyde fast from air specifically.
Background technology
At present, after family is fitted up, the ornament materials used all can discharge a kind of harmful gas containing formaldehyde, absorption of human body is this poisoning containing meeting after the gas of formaldehyde, the life security of entail dangers to people is gone back time serious, therefore, the furniture of formaldehyde is contained to indoor and air detects and eliminates, to ensure that indoor harmful gas can not exceed state specified standards, otherwise will have influence on the health of people, the concentration of formaldehyde discharged in all concentration to Indoor Air Formaldehyde and furniture upholstery detects necessary property.
Now, according to " code for indoor environmental pollution control of civil building engineering ", in the 6th examination: " when (4) civil building engineering is checked and accepted, the detection of indoor environmental pollution substrate concentration must be carried out.Testing result should accord with regulation." detection method of wherein civil building engineering formaldehyde in indoor air, the 1st method phenol reagent method in standard GB/T/T18204.26-2000 " public place method for determining formaldehyde in air " should be met.
In GB/T18204.26-2000 " public place method for determining formaldehyde in air phenol reagent method ", need to carry out air sampling in laboratory preparation test agents and the Test Field bringing atmospheric sampling instrument arrival needs to detect in advance, and laboratory assay need be taken back by adopting the air come, detect with spectrophotometer, just can draw last concentration of formaldehyde testing result, individual also cannot detect voluntarily.At present, national standard method is: existing by phenol reagent wiring solution-forming, then gathers air sample, makes the formaldehyde reaction in this solution and air, production compound, then add chromogenic reagent.Shortcoming is that phenol reagent solution is unstable, needs namely to join i.e. use, can not realize long-term storage and remain valid, generally can only preserve one day, detect inconvenience; And from after air sampling to the process entering test in laboratory, in order to ensure the accuracy of testing result, be generally need speciality chemical testing personnel to carry out tracking process, take a large amount of human resources and consume too much money, this is that ordinary consumer is difficult to bear.
For this reason, be necessary to develop one can be applicable to consumer and do it yourself to carry out detection formaldehyde, and the product that its result is consistent with the 1st method phenol reagent method in national standard method GB/T18204.26-2000 " public place method for determining formaldehyde in air ".The color range of the concentration of formaldehyde colour developing reading of this product is consistent with the formaldehyde of national standard method, could detect air formaldehyde concentration exactly like this.
Summary of the invention
The one that object of the present invention is exactly deficiency in order to solve prior art and provides is formed with solid and deposits, and medicament is stablized, long shelf-life, easily portable, safety easy to use, uses during detection, can not the wasting test agents detecting content of formaldehyde fast from air.
It is simple and can draw the quick detection method detecting content of formaldehyde from air of concentration of formaldehyde testing result fast that another object of the present invention is to provide a kind of detection method.
The present invention adopts following technical solution to realize above-mentioned purpose: a kind of test agents detecting content of formaldehyde fast from air, it is characterized in that, its raw materials by weight comprises: the detection powder containing phenol reagent 0.005%-5%, the colour developing powder containing ammonium ferric sulfate powder 0.05%-10% and the tracer liquid containing water 80%-100%.
Further illustrating as such scheme, detecting in the formula of powder except phenol reagent, is using inorganic salts powder as filling agent; Equally, in the formula of colour developing powder except ammonium ferric sulfate powder, be also using inorganic salts powder as filling agent.
Further, detect powder, colour developing powder and these three kinds of raw materials of tracer liquid individually to deposit, tracer liquid is neutral solution, just detection powder and tracer liquid is made into absorbing liquid in use, then interpolation colour developing powder is made into the test agents that pH value is 1-5.
A kind of method for fast detection of formaldehyde, it is characterized in that, it comprises following operation steps:
1) air sampler is used to take formaldehyde in air:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 0.5-2 hour, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: 0.05-10g is detected powder and 5-100ml tracer liquid is poured in vessel, shaking vessel 10-60 gently becomes absorbing liquid to agent dissolves second, then gets 2-15ml absorbing liquid stand-by;
C, use air sampler take air sample: poured into by above-mentioned 2-15ml absorbing liquid in the bubble absorption tube be connected with air sampler, then air sampler is started, make its flow velocity be 0.5-3L/min, the sampling time is 3-20min, and namely air sampling volume is 1.5-60L;
The colour developing of d, formaldehyde absorbent: imported in vessel by the absorbing liquid of above-mentioned bubble absorption tube, the powder that developed the color by 0.05-10g is also poured in vessel, shake vessel 10-60 second gently to powder dissolution, then leave standstill 10-30 minute, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.Detecting concentration of formaldehyde scope is 0-0.60mg/m
3.
2) vessel are used to take formaldehyde in air:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 0.5-2 hour, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: 0.05-10g is detected powder and 5-100ml tracer liquid is poured in vessel, shaking vessel 10-60 gently becomes absorbing liquid to agent dissolves second, then gets 5-15ml absorbing liquid stand-by;
Air sample taked by c, use vessel: pour in vessel by above-mentioned 5-15ml absorbing liquid, be placed in the middle of space, standing time is 3-10h;
The colour developing of d, formaldehyde absorbent: the powder that developed the color by 0.05-10g is poured in vessel, shake vessel 10-60 second gently to powder dissolution, then leave standstill 10-30 minute, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.
From air, detect the colorimetric card used in the detection method of content of formaldehyde fast, it is characterized in that, it is from 0-0.60mg/m according to the detectable concentration formulated by formaldehyde titer colour developing color range
3, developing the color differential is 0.08mg/m
3, the concentration of formaldehyde in colorimetric card comprises 8 look levels than colour band successively according to the depth of color, and corresponding concentration of formaldehyde is followed successively by 0,0.04mg/m
3, 0.08mg/m
3, 0.16mg/m
3, 0.24mg/m
3, 0.32mg/m
3, 0.48mg/m
3, 0.6mg/m
3.
The beneficial effect that the present invention adopts above-mentioned technical solution to reach is:
1, the test agents of the present invention's employing is without the need to prior preparation, can use when air sampling detects, and test agents is stablized, long shelf-life; Detection speed is fast, and detection method is simple, does not need special instrument and very high skill just to detect the concentration of formaldehyde in indoor or furniture, relatively just can draw the testing result of concentration of formaldehyde fast, use very convenient finally by color.
2, be made into can the powder of long-term storage for the present invention's phenol reagent and inorganic salts, and Detection results is consistent with the phenol reagent of wiring solution-forming, overcomes the problem of phenol reagent solution instability in prior art.
3, developer ammonium ferric sulfate of the present invention becomes the powder that can directly use with inorganic salts mixture, without the need to being configured to solution, using and depositing convenient.
Accompanying drawing explanation
Fig. 1 is the concentration of formaldehyde colour developing color range in GB/T18204.26-2000 " public place method for determining formaldehyde in air phenol reagent method ";
Fig. 2 is the concentration of formaldehyde colour developing color range of product of the present invention;
Fig. 3 of the present inventionly compares colour band.
Embodiment
Below in conjunction with specific embodiment, the technical program is explained in detail.
The present invention is a kind of test agents and method of detecting fast content of formaldehyde from air, for detection method, required instrument and medicament as follows:
Instrument aspect: need air sampler, larger bubbles absorption tube, 10ml graduated cylinder, (bore is 2-10cm or area is 3-100cm to absorption vessel
2round box or square box), colorimetric card.
Medicament aspect: detect powder (phenol reagent containing 0.005%-5%), tracer liquid (distilled water containing 80%-100%), colour developing powder (containing ammonium ferric sulfate powder 0.05%-10%).Detecting in the formula of powder except phenol reagent, is using inorganic salts powder as filling agent; Equally, in the formula of colour developing powder except ammonium ferric sulfate powder, be also using inorganic salts powder as filling agent.Detect powder, colour developing powder and these three kinds of raw materials of tracer liquid individually to deposit, tracer liquid is neutral solution, just detection powder and tracer liquid is made into absorbing liquid in use, then interpolation colour developing powder is made into the test agents that pH value is 1-5.
Embodiment 1
The present embodiment uses air sampler to take formaldehyde in air, and its concrete operation step is as follows:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 1 hour, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: 2g is detected powder and 20ml tracer liquid is poured in vessel, shaking vessel 20 gently becomes absorbing liquid to agent dissolves second, then gets 5ml absorbing liquid stand-by;
C, use air sampler take air sample: poured into by above-mentioned 5ml absorbing liquid in the bubble absorption tube be connected with air sampler, if detect Indoor Air Formaldehyde concentration, by air sampler in indoor centre position, and liftoff 1m places, then air sampler is started, make its flow velocity be 1L/min, the sampling time is 10min, and namely air sampling volume is 10L;
The colour developing of d, formaldehyde absorbent: imported in vessel by the absorbing liquid of above-mentioned bubble absorption tube, the powder that developed the color by 1g is also poured in vessel, shake vessel 30 seconds gently to powder dissolution, then leave standstill 20 minutes, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.
In the technical program, the reading of test agents PARA FORMALDEHYDE PRILLS(91,95) concentration colour developing color range (see Fig. 2) and the concentration of formaldehyde in national standard method GB/T18204.26-2000 " the public place method for determining formaldehyde in air phenol reagent method " color range that develops the color is consistent (see Fig. 1).
And the ratio colour band (see Fig. 3) used in the present invention is the custom-designed testing tool of the technical program, according to what formulate by formaldehyde titer colour developing color range, and detectable concentration is from 0-0.60mg/m
3, detectable concentration scope is wide, and developing the color differential is 0.08mg/m
3; Concentration of formaldehyde in colorimetric card comprises 8 look levels than colour band successively according to the depth of color, and corresponding concentration of formaldehyde is followed successively by 0,0.04mg/m
3, 0.08mg/m
3, 0.16mg/m
3, 0.24mg/m
3, 0.32mg/m
3, 0.48mg/m
3, 0.6mg/m
3.Logical consumer's colorimetric readout is easy.
Embodiment 2
The present embodiment is also use air sampler to gather formaldehyde in air, and its concrete operation step is as follows:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 1.5 hours, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: 4g is detected powder and 30ml tracer liquid is poured in vessel, shaking vessel 25 gently becomes absorbing liquid to agent dissolves second, then gets 5ml absorbing liquid stand-by;
C, use air sampler take air sample: poured into by above-mentioned 5ml absorbing liquid in the bubble absorption tube be connected with air sampler, if detect Indoor Air Formaldehyde concentration, by air sampler in indoor centre position, and liftoff 1m places, then air sampler is started, make its flow velocity be 1.5L/min, the sampling time is 15min, and namely air sampling volume is 10L;
The colour developing of d, formaldehyde absorbent: imported in vessel by the absorbing liquid of above-mentioned bubble absorption tube, the powder that developed the color by 3g is also poured in vessel, shake vessel 40 seconds gently to powder dissolution, then leave standstill 15 minutes, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.
Embodiment 3
The difference of the present embodiment and embodiment 1 and embodiment 2 is, is to use vessel to take formaldehyde in air, and its concrete operation step is as follows:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 1 hour, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: 1g is detected powder and 50ml tracer liquid is poured in vessel, shaking vessel 40 gently becomes absorbing liquid to agent dissolves second, then gets 10ml absorbing liquid stand-by;
Air sample taked by c, use vessel: pour in vessel by above-mentioned 10ml absorbing liquid, be placed in the middle of space, standing time is 4h;
The colour developing of d, formaldehyde absorbent: the powder that developed the color by 1g is poured in vessel, shake vessel 50 seconds gently to powder dissolution, then leave standstill 20 minutes, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.
Embodiment 4
The difference of the present embodiment and embodiment 1 and embodiment 2 is, is to use vessel to take formaldehyde in air, and its concrete operation step is as follows:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 2 hours, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: 2g is detected powder and 40ml tracer liquid is poured in vessel, shaking vessel 30 gently becomes absorbing liquid to agent dissolves second, then gets 10ml absorbing liquid stand-by;
Air sample taked by c, use vessel: pour in vessel by above-mentioned 10ml absorbing liquid, be placed in the middle of space, standing time is 4.5h;
The colour developing of d, formaldehyde absorbent: the powder that developed the color by 2g is poured in vessel, shake vessel 40 seconds gently to powder dissolution, then leave standstill 25 minutes, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.
Compared with prior art, its advantage is in the present invention:
The first, the test agents of employing, without the need to prior preparation, can use when air sampling detects, and test agents is stablized, long shelf-life; Detection speed is fast, and detection method is simple, does not need special instrument and very high skill just to detect the concentration of formaldehyde in indoor or furniture, relatively just can draw the testing result of concentration of formaldehyde fast, use very convenient finally by color.
Second, the detection powder that the present invention's phenol reagent and inorganic salts are made into can long-term storage, and the detection solution of prior art needed configured the same day, and one day can only be preserved, detection powder of the present invention then can preserve 4-5, and Detection results is consistent with the phenol reagent of wiring solution-forming, overcome the problem of phenol reagent solution instability in prior art.
3rd, developer ammonium ferric sulfate of the present invention becomes the powder that can directly use with inorganic salts mating, without the need to being configured to solution, using and depositing convenient;
It should be noted that all formaldehyde test solutions in currently available technology chromophoric solution with certain potential of hydrogen (pH value) owing to being preparation in advance, can along with passage of time, environmental change and changing; Therefore, long-term preservation cannot be accomplished, and the pot-life is short; And breakthrough point of the present invention is before interpolation colour developing powder, do potential of hydrogen test, detect solution not develop the color, for neutral solution, after interpolation colour developing powder, the acid solution of pH value between 1-5 just can be formed, therefore, detect solution can separately deposit with colour developing powder, long-term preservation, overcome for a long time both at home and abroad technician always the insurmountable formaldehyde examination solution resting period short, and the problem changed in censorship process.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (8)
1. one kind detects the test agents of content of formaldehyde fast from air, it is characterized in that, its raw materials by weight comprises: the detection powder containing phenol reagent 0.005%-5%, the colour developing powder containing ammonium ferric sulfate powder 0.05%-10% and the tracer liquid containing water 80%-100%.
2. the test agents detecting content of formaldehyde fast from air according to claim 1, is characterized in that, detecting in the formula of powder is using inorganic salts powder as filling agent; Using inorganic salts powder as filling agent in the formula of colour developing powder.
3. the test agents detecting content of formaldehyde fast from air according to claim 1, it is characterized in that, detect powder, colour developing powder and these three kinds of raw materials of tracer liquid individually to deposit, tracer liquid is neutral solution, just detection powder and tracer liquid are made into absorbing liquid in use, then interpolation colour developing powder is made into the test agents that pH value is 1-5.
4. utilize the quick detection method detecting content of formaldehyde from air that the test agents as described in claim 1-3 any one realizes, it is characterized in that, it comprises following operation steps:
Before a, detection: by detected space under the state of natural ventilation, external door and window closes 0.5-2 hour, and in testing process, door and window also will be kept in detention;
The preparation of b, absorbing liquid: detection powder and tracer liquid are poured in vessel, shaking vessel gently becomes absorbing liquid to agent dissolves, then takes out a certain amount of absorbing liquid stand-by;
C, take air sample;
The colour developing of d, formaldehyde absorbent: the powder that developed the color by 0.05-10g is poured in vessel, shake vessel 10-60 second gently to powder dissolution, then leave standstill 10-30 minute, absorbing liquid shows colored liquid;
E, colorimetric readout: color shown by above-mentioned colored liquid is compared with the color of the ratio colour band made, the concentration of formaldehyde in air can be read according to shade.
5. the detection method detecting content of formaldehyde fast from air according to claim 4, it is characterized in that, in described operation steps, what adopt is that air sampler gathers formaldehyde in air, in stepb, be 0.05-10g is detected powder and 5-100ml tracer liquid is poured in vessel, shaking vessel 10-60 gently becomes absorbing liquid to agent dissolves second, then gets 2-15ml absorbing liquid stand-by; Poured in the bubble absorption tube be connected with air sampler by above-mentioned 2-15ml absorbing liquid, then start air sampler, make its flow velocity be 0.5-3L/min, the sampling time is 3-20min; In the process color of the formaldehyde absorbent of steps d, be that the absorbing liquid of described bubble absorption tube is imported in vessel, and then the powder that developed the color by 0.05-10g is also poured in vessel.
6. the detection method detecting fast content of formaldehyde from air according to claim 4, is characterized in that, in described operation steps, employing be that vessel gather formaldehyde in air;
In the process for preparation of the absorbing liquid of step b, be 0.05-10g is detected powder and 5-100ml tracer liquid is poured in vessel, shaking vessel 10-60 gently becomes absorbing liquid to agent dissolves second, then gets 5-15ml absorbing liquid stand-by; Pour in vessel by described 5-15ml absorbing liquid, be placed in the middle of space, standing time is 3-10h.
7. fast from air, detect the colorimetric card used in the detection method of content of formaldehyde as claimed in claim 4, it is characterized in that, it is formulated according to by formaldehyde titer colour developing color range, and detectable concentration is from 0-0.60mg/m
3, developing the color differential is 0.08mg/m
3.
8. according to claim 7ly from air, detect the colorimetric card used in the detection method of content of formaldehyde fast, it is characterized in that, concentration of formaldehyde in colorimetric card comprises 8 ranks than colour band successively according to the depth of color, and corresponding concentration of formaldehyde is followed successively by 0,0.04mg/m
3, 0.08mg/m
3, 0.16mg/m
3, 0.24mg/m
3, 0.32mg/m
3, 0.48mg/m
3, 0.6mg/m
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708282.5A CN105352950A (en) | 2015-10-24 | 2015-10-24 | Detection medicament and method for rapid detection of formaldehyde content in air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708282.5A CN105352950A (en) | 2015-10-24 | 2015-10-24 | Detection medicament and method for rapid detection of formaldehyde content in air |
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| CN105352950A true CN105352950A (en) | 2016-02-24 |
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| CN201510708282.5A Pending CN105352950A (en) | 2015-10-24 | 2015-10-24 | Detection medicament and method for rapid detection of formaldehyde content in air |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106872375A (en) * | 2017-02-13 | 2017-06-20 | 深圳市天得环境科技有限公司 | Formaldehyde tester, method of testing and calibration method |
| CN107144536A (en) * | 2017-05-22 | 2017-09-08 | 南通市建筑科学研究院有限公司 | A kind of method that miniature phenol reagent method determines formaldehyde in indoor air |
| CN115494164A (en) * | 2021-06-18 | 2022-12-20 | 中国科学院大连化学物理研究所 | Method for detecting formaldehyde in gas-solid heterogeneous catalytic reaction process |
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