CN216160476U - Portable multi-functional formaldehyde detection device - Google Patents

Abstract

The utility model discloses a portable multifunctional formaldehyde detection device, and relates to the field of formaldehyde detection. The storage device comprises a first storage chamber and a second storage chamber, wherein the bottom of the first storage chamber is connected with the top of the second storage chamber; the top of the first storage chamber is provided with a sealing film, and the bottom of the first storage chamber is provided with a thin plate; a formaldehyde detection gel chip is placed on the thin plate; the second storage chamber is filled with a color developing reagent; and a plate breaking device for breaking the thin plate to enable the formaldehyde detection gel chip to fall is arranged in the second storage chamber. The utility model has the characteristics of small volume, simple structure and convenient operation, can reduce the system complexity of the detection equipment and improve the detection efficiency and the detection effect; compared with the conventional detection device on the market, the portable detection device is convenient to carry, simple in preparation method, low in single detection cost, safe and non-toxic; the operation is simple, and the formaldehyde can be detected by only opening the upper cover and tearing the sealing film when in use.

Description

Portable multi-functional formaldehyde detection device

Technical Field

The utility model relates to the field of formaldehyde detection, in particular to a portable multifunctional formaldehyde detection device.

Background

Formaldehyde is an organic chemical substance, also called formil, a colorless gas with strong pungent odor and high toxicity, and has an irritant effect on human eyes, noses and the like. Formaldehyde is readily soluble in water and ethanol. The concentration of the aqueous solution can reach up to 55%, generally 35% to 40%, usually 37%, and is called formalin, commonly called formalin. Formaldehyde is an important industrial raw material and is widely used for production of adhesives, veneers, paints and coatings, textile dyeing auxiliaries, sterilization and corrosion prevention. Formaldehyde has strong damage to the central nervous system, retina, lung and liver of a human body, and can trigger endocrine dysfunction and skin diseases.

Formaldehyde gas is one of the most prominent indoor pollutants, and the concentration rises year by year. The boards, paints, carpets, wallpaper, etc. commonly used for interior decoration contain and release formaldehyde. In order to ensure the health of human bodies, the method is vital to detect the concentration of formaldehyde quickly, sensitively and accurately.

The existing formaldehyde detection methods mainly comprise spectrophotometry, colorimetry, electrochemistry, chromatography, fluorescence, chemiluminescence, ion selective electrode method and the like, wherein except the colorimetry, other formaldehyde detection methods all need corresponding professional instruments, so that the operation is relatively complex, and a user is required to perform certain instrument operation. Many formaldehyde detection reagents, test paper and the like based on a colorimetric method are available on the market, but the detection methods are not simple to use, formaldehyde detection needs to be carried out under specific conditions, and even the detection results are influenced by the mixed use of a plurality of reagents. The conditions of pouring, dripping and leaking on the skin and the like are easy to occur in the detection process, so that the detection is invalid. In addition, the existing formaldehyde test paper is generally a single test paper, can only detect formaldehyde in air or formaldehyde in solution, and rarely can meet the requirements at the same time.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a portable multifunctional formaldehyde detection device to solve the problems.

In order to achieve the above object, the present invention provides a portable multifunctional formaldehyde detecting device, which comprises a first storage chamber and a second storage chamber, wherein the bottom of the first storage chamber is connected with the top of the second storage chamber; the top of the first storage chamber is provided with a sealing film, and the bottom of the first storage chamber is provided with a thin plate; a formaldehyde detection gel chip is placed on the thin plate; the second storage chamber is internally provided with a chromogenic reagent; and a plate breaking device for breaking the thin plate to enable the formaldehyde detection gel chip to fall is arranged in the second storage chamber.

Furthermore, the storage device also comprises an upper cover, wherein the upper cover is detachably arranged at the top of the first storage chamber.

Furthermore, the upper cover is provided with a colorimetric color scale.

Furthermore, a transparent observation window is arranged on the upper cover.

Further, a rotary switch piece is rotatably arranged on the upper cover; when the rotary switch piece is opened, the transparent observation window is leaked, and when the rotary switch piece is closed, the observation window is closed.

Furthermore, a tear strip is arranged between the lower end of the outer wall of the first storage chamber and the upper end of the outer wall of the second storage chamber, is in a strip shape and is circumferentially arranged along the outer walls of the first storage chamber and the second storage chamber; the tearing strip is broken end to form a notch; the head end of the tearing strip is provided with a pull ring.

Furthermore, a first connecting piece is arranged at the bottom of the first storage chamber, a second connecting piece is arranged inside the outer wall of the second storage chamber, the first connecting piece and the second connecting piece are connected through threads, and the outer wall of the first connecting piece is tightly attached to the inner side of the outer wall of the second storage chamber so as to ensure the sealing performance of the second storage chamber.

Furthermore, the plate breaking device is a spike arranged at the top end of the second connecting piece, and at least one spike is arranged.

The utility model has the characteristics of small volume, simple structure and convenient operation, can reduce the system complexity of the detection equipment and improve the detection efficiency and the detection effect. Compared with the conventional detection device on the market, the portable detection device is convenient to carry, simple in preparation method, low in single detection cost, safe and non-toxic; the operation is simple, and the formaldehyde can be detected by only opening the upper cover and tearing the sealing film when in use. When in use, the liquid-saving sofa has no requirement on the flatness of the ground and the table top, does not cause the phenomenon of solution pouring, and meets the use requirements of the sofa bottom, the wardrobe interlayer, the bed bottom and the like.

Drawings

FIG. 1 is a schematic view of a portable multifunctional formaldehyde detection device according to the present invention;

FIG. 2 is a sectional view of a portable multifunctional formaldehyde detecting device according to the present invention;

FIG. 3 is a schematic view of a second storage chamber of the portable multifunctional formaldehyde detecting device according to the present invention.

In the figure: 1-upper cover, 11-colorimetric color scale, 12-transparent observation window, 13-rotary switch piece, 2-first storage chamber, 21-sheet, 22-tear strip, 23-pull ring, 24-first connecting piece, 3-second storage chamber, 31-spine and 32-second connecting piece.

Detailed Description

To achieve the above objects and advantages, the present invention provides a technical means and a structure thereof, which are described in detail with reference to the accompanying drawings.

As shown in the attached drawings 1-3, the utility model provides a portable multifunctional formaldehyde detection device, which comprises a first storage chamber 2 and a second storage chamber 3, wherein the bottom of the first storage chamber 2 is connected with the top of the second storage chamber 3; a sealing film is arranged at the top of the first storage chamber 2, the sealing film is preferably an aluminum foil sealing film, and a thin plate 21 is arranged at the bottom of the first storage chamber 2; the material of the thin plate 21 is preferably Polystyrene (PS) plastic, and the thin plate is relatively brittle and has good water resistance, chemical corrosion resistance and processing flow property; a formaldehyde detection gel chip is placed on the thin plate 21; the second storage chamber 3 contains a color reagent; and a plate breaking device for breaking the thin plate 21 to drop the formaldehyde detection gel chip is arranged in the second storage chamber 3.

In another embodiment, the device further comprises an upper cover 1, wherein the upper cover 1 is detachably arranged on the top of the first storage chamber 2; the upper cover 1 is provided with a colorimetric color scale 11; a transparent observation window 12 is arranged on the upper cover 1; the transparent observation window 12 is made of polymethyl methacrylate (PMMA), commonly known as organic glass, gelatin glass, acrylic and the like, and has the advantages of good transparency, chemical stability, mechanical property, weather resistance, easy processability and the like; a rotary switch piece 13 is rotatably arranged on the upper cover 1; when the rotary switch 13 is opened, the transparent observation window 12 leaks, and when the rotary switch 13 is closed, the observation window 12 is closed.

In another embodiment, a tear strip 22 is disposed between the lower end of the outer wall of the first storage chamber 2 and the upper end of the outer wall of the second storage chamber 3, and the tear strip 22 is in a long strip shape and is disposed along the circumferential direction of the outer walls of the first storage chamber 2 and the second storage chamber 3; the tearing strip 22 is broken end to form a gap; the tear strip 22 is provided with a pull ring 23 at the head end.

In another embodiment, the first connecting member 24 is disposed at the bottom of the first storage chamber 2, the second connecting member 32 is disposed inside the outer wall of the second storage chamber 3, the first connecting member 24 and the second connecting member 32 are connected by means of screw threads, and the outer wall of the first connecting member 24 is tightly attached to the inner side of the outer wall of the second storage chamber 3, so as to ensure the tightness of the second storage chamber 3. The plate breaking device is a spike 31 arranged at the top end of the second connecting piece 32, the number of the spike 31 is at least one, and the number of the spikes is two.

The visual formaldehyde detection gel chip is prepared by the following steps:

weighing a certain amount of 3-methyl-2-benzothiazolinone hydrazone hydrochloride, dissolving the 3-methyl-2-benzothiazolinone hydrazone hydrochloride in deionized water to prepare 0.30% of 3-methyl-2-benzothiazolinone hydrazone hydrochloride aqueous solution;

preparing a 2% polyvinyl alcohol solution and a 10% acrylamide solution by taking a 10% glycerol aqueous solution as a solvent and respectively taking polyvinyl alcohol and acrylamide as solutes; mixing the polyvinyl alcohol solution and the acrylate monomer solution, and then sequentially adding 0.5% of N, N ' -methylene bisacrylamide, 0.05% of N, N, N ', N ' -tetramethyl ethylenediamine and 0.5% of potassium persulfate to obtain a gel precursor solution;

injecting the gel precursor solution into a circular mold with the thickness of 3mm and the diameter of 2cm, placing the circular mold in an oven, heating for 1h at 65 ℃, taking out the circular mold after gelling, placing the circular mold in deionized water, washing and soaking for 2h, then integrally soaking the circular mold in the 3-methyl-2-benzothiazolinone hydrazone hydrochloride aqueous solution, replacing the 3-methyl-2-benzothiazolinone hydrazone hydrochloride aqueous solution at least once after soaking for 2h, continuously soaking for 12h, then placing the circular mold in a refrigerator at-20 ℃, completely freezing, then unfreezing for 2h at room temperature, freezing and unfreezing for one cycle, and after 2 times of cycles, obtaining the visual formaldehyde detection gel chip after absorbing surface moisture.

The preparation process of the color reagent is as follows:

weighing a certain amount of ammonium ferric sulfate, dissolving the ammonium ferric sulfate in 0.1% dilute sulfuric acid solution to prepare 4% acidic ammonium ferric sulfate solution, and taking the acidic ammonium ferric sulfate solution as a color developing reagent.

When detecting formaldehyde in the liquid:

first, the upper cover 1 is opened, the sealing film on the top of the first storage chamber 2 is torn open, and 0.1mL of sample solution to be detected is dripped onto the visual formaldehyde detection gel chip. In order to avoid formaldehyde in the air from influencing the detection result, the upper cover 1 is covered after the solution of the sample to be detected is dripped in, and meanwhile, the influence on the detection caused by the dumping of the device can be avoided. After reacting for 10min, pulling the tear strip 22, screwing the second storage chamber 3 upwards along the thread direction, breaking the thin plate 21 by the sharp spine 31 in the rotating process, enabling the formaldehyde detection gel chip to fall down to be in contact with the color developing reagent, and gradually changing the color of the gel into blue at the moment, wherein the color tends to be stable after 5 min. At this time, the rotary switch 13 is opened to illuminate the transparent observation window 12. And observing the color change degree of the visual formaldehyde detection gel chip through the transparent observation window 12, and comparing the color change degree with the nearby colorimetric color level 11 to determine the formaldehyde concentration.

When formaldehyde in the gas is detected:

first open upper cover 1, tear the sealing film at 2 tops of first apotheca, expose visual formaldehyde detection gel chip in the environment that awaits measuring (airtight environment is the best), visual formaldehyde detection gel chip makes it can absorb more formaldehyde gas because it has great specific surface area, good adsorption efficiency, the better formaldehyde demand that satisfies low concentration formaldehyde gas. After the reaction is carried out for 5min, the tear strip 22 is pulled open, the second storage chamber 3 is screwed upwards along the thread direction, the thin plate 21 is broken by the sharp spine 31 in the rotating process, the formaldehyde detection gel chip falls down to be in contact with the color developing reagent, the gel gradually turns blue, and the color tends to be stable after 5 min. At this time, the rotary switch 13 is opened to illuminate the transparent observation window 12. And observing the color change degree of the visual formaldehyde detection gel chip through the transparent observation window 12, and comparing the color change degree with the nearby colorimetric color level 11 to determine the formaldehyde concentration.

The above description is only a preferred embodiment of the present invention, and not all embodiments, and all structural changes made under the teaching of the present invention should be understood as belonging to the protection scope of the present invention.

Claims (8)

1. A portable multifunctional formaldehyde detection device is characterized by comprising a first storage chamber and a second storage chamber, wherein the bottom of the first storage chamber is connected with the top of the second storage chamber; the top of the first storage chamber is provided with a sealing film, and the bottom of the first storage chamber is provided with a thin plate; a formaldehyde detection gel chip is placed on the thin plate; the second storage chamber is internally provided with a chromogenic reagent; and a plate breaking device for breaking the thin plate to enable the formaldehyde detection gel chip to fall is arranged in the second storage chamber.

2. The portable multifunctional formaldehyde detecting device according to claim 1, further comprising an upper cover, wherein the upper cover is detachably disposed on the top of the first storage chamber.

3. The portable multifunctional formaldehyde detecting device according to claim 2, wherein the upper cover is provided with a colorimetric color scale.

4. The portable multifunctional formaldehyde detecting device according to claim 3, wherein a transparent viewing window is provided on the upper cover.

5. The portable multifunctional formaldehyde detecting device according to claim 4, wherein the upper cover is rotatably provided with a rotary switch member; when the rotary switch piece is opened, the transparent observation window is leaked, and when the rotary switch piece is closed, the observation window is closed.

6. The portable multifunctional formaldehyde detecting device according to claim 1, wherein a tear strip is disposed between the lower end of the outer wall of the first storage chamber and the upper end of the outer wall of the second storage chamber, the tear strip is in the shape of a strip and is disposed along the circumferential direction of the outer walls of the first storage chamber and the second storage chamber; the tearing strip is broken end to form a notch; the head end of the tearing strip is provided with a pull ring.

7. The portable multifunctional formaldehyde detecting device as claimed in claim 6, wherein the first connecting member is disposed at the bottom of the first storage chamber, the second connecting member is disposed inside the outer wall of the second storage chamber, the first connecting member and the second connecting member are connected by a screw, and the outer wall of the first connecting member is tightly attached to the inner side of the outer wall of the second storage chamber, so as to ensure the sealing property of the second storage chamber.

8. The portable multifunctional formaldehyde detecting device according to claim 7, wherein the plate breaking device is a spike disposed at the top end of the second connecting member, and at least one of the spikes is provided.

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