Device for detecting isobutyraldehyde and application thereof, method for detecting isobutyraldehyde

Abstract

The application provides a detection device for isobutyraldehyde and application and a method for detecting isobutyraldehyde, relates to the technical field of isobutyraldehyde detection, and comprises an automatic sampling part, a catalytic luminescence reactor and a detection instrument; wherein the catalytic layer of the catalytic luminescence reactor comprises nano barium titanate; the detection device has sensitive response, excellent specificity and better stability to isobutyraldehyde, achieves the technical effects of good reproducibility, rapid response, rapid recovery and repeated detection in a short time, and provides guarantee for long-term online accurate detection of the isobutyraldehyde concentration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of isobutyraldehyde detection, and particularly to an isobutyraldehyde detection device and application thereof and an isobutyraldehyde detection method. BACKGROUND

[0002] Isobutyraldehyde is an important organic chemical raw material and is widely used as a solvent, but isobutyraldehyde is a toxic and harmful irritant substance and is extremely flammable and explosive when encountering fire or high heat. Therefore, in actual production operations, how to achieve rapid, sensitive and real-time online detection of the isobutyraldehyde concentration in the air has extremely important practical significance for preventing harm caused by isobutyraldehyde in the use process.

[0003] In view of this, the present application is proposed. SUMMARY

[0004] One of the purposes of the present application is to provide an isobutyraldehyde detection device with sensitive response, excellent specificity and good stability, which can achieve good reproducibility, rapid response, rapid recovery and short-time repeated detection.

[0005] The second purpose of the present application is to provide an isobutyraldehyde detection method, which can accurately detect the isobutyraldehyde concentration in the air in real time.

[0006] The third purpose of the present application is to provide an application of the isobutyraldehyde detection device, which can effectively prevent harm caused by isobutyraldehyde in the use process and has outstanding application effects.

[0007] In order to achieve the above purposes of the present application, the following technical solutions are adopted:

[0008] In a first aspect, an isobutyraldehyde detection device comprises an automatic sampling part, a catalytic luminescence reactor and a detection instrument.

[0009] The catalytic layer of the catalytic luminescence reactor comprises nano-barium titanate.

[0010] Further, the nano-barium titanate comprises barium titanate with a particle size of 86-2000 nm, preferably barium titanate with a particle size of 116 nm.

[0011] Further, the automatic sampling part mainly comprises a push-pull syringe pump, a double-path VOCs generator and a six-way valve.

[0012] Further, the reaction cavity of the catalytic luminescence reactor comprises a quartz tube.

[0013] Further, the base of the quartz tube is provided with a ceramic rod.

[0014] The surface of the ceramic rod is attached with the nano-barium titanate as a catalytic layer.

[0015] Further, the detection instrument mainly comprises a weak luminescence measuring instrument, a detector and a controller.

[0016] Further, the weak luminescence measuring instrument is of BPCL-1-TGC.

[0017] In a second aspect, a method for detecting isobutyl aldehyde by using the detection device of any one of the above aspects comprises the following steps:

[0018] The sample is injected through the automatic injection part, and catalytic reaction occurs between the sample and the catalytic layer of the catalytic luminescence reactor; the light signal generated during the catalytic reaction is detected by the detection instrument; and when the detected light signal reaches a set value, it is determined that the sample contains isobutyl aldehyde.

[0019] Further, the injection method comprises injection through a six-way valve.

[0020] In a third aspect, the detection device of any one of the above aspects is applied in chemical production.

[0021] Compared with the prior art, the present application has at least the following beneficial effects:

[0022] The detection device for isobutyl aldehyde provided by the present application uses nano-barium titanate as the catalytic layer of the catalytic luminescence reactor; isobutyl aldehyde can catalyze the luminescence reaction with nano-barium titanate to generate a light signal; the light signal generated during the catalytic luminescence is detected by a detection instrument, and then it is determined whether isobutyl aldehyde is contained and its concentration; the detection device of the present application uses nano-barium titanate as the catalytic layer, and therefore has the characteristics of high response sensitivity, good specificity and good stability; the concentration of isobutyl aldehyde gas in the air can be accurately detected in real time and online, and the detection device has good reproducibility, rapid response and rapid recovery.

[0023] The method for detecting isobutyl aldehyde provided by the present application has high response sensitivity, good specificity and good stability; the concentration of isobutyl aldehyde gas in the air can be accurately detected in real time and online.

[0024] The application of the detection device for isobutyl aldehyde provided by the present application can effectively prevent the harm caused by isobutyl aldehyde during use, and has outstanding application effects. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0026] Figure 1 XRD pattern of the nano-barium titanate obtained in the test example 1 of the present application;

[0027] Figure 2 SEM pattern of BTO-1 obtained in the test example 1 of the present application;

[0028] Figure 3 SEM pattern of BTO-2 obtained in the test example 1 of the present application;

[0029] Figure 4 SEM pattern of BTO-3 obtained in the test example 1 of the present application;

[0030] Figure 5 Cataluminescence signal of isobutyraldehyde on different material surfaces obtained in the test example 2 of the present application;

[0031] Figure 6 Cataluminescence signal of different substances on the catalytic layer (BTO-1, barium titanate with a particle size of 116 nm) of Example 1 obtained in the test example 3 of the present application;

[0032] Figure 7 Response curve of different concentrations of isobutyraldehyde to the detection device of Example 1 obtained in the test example 4 of the present application;

[0033] Figure 8 Response curve of different concentrations of isobutyraldehyde to the detection device of Example 2 obtained in the test example 4 of the present application;

[0034] Figure 9 Response curve of different concentrations of isobutyraldehyde to the detection device of Example 3 obtained in the test example 4 of the present application;

[0035] Figure 10 Standard curve of isobutyraldehyde measured by the detection device of Example 1 obtained in the test example 5 of the present application;

[0036] Figure 11 Standard curve of isobutyraldehyde measured by the detection device of Example 2 obtained in the test example 5 of the present application;

[0037] Figure 12 Standard curve of isobutyraldehyde measured by the detection device of Example 3 obtained in the test example 5 of the present application;

[0038] Figure 13 Signal value of isobutyraldehyde measured by the detection device of Example 1 obtained from the test example 6 of the present application;

[0039] Figure 14 Signal value of isobutyraldehyde measured by the detection device of Example 2 obtained from the test example 6 of the present application;

[0040] Figure 15 Signal value of isobutyraldehyde measured by the detection device of Example 3 obtained from the test example 6 of the present application;

[0041] Figure 16 Signal change trend chart of isobutyraldehyde gas continuously measured by the detection device of Example 1 obtained from the test example 7 of the present application;

[0042] Figure 17 Signal change trend chart of isobutyraldehyde gas continuously measured by the detection device of Example 2 obtained from the test example 7 of the present application;

[0043] Figure 18 Signal change trend chart of isobutyraldehyde gas continuously measured by the detection device of Example 3 obtained from the test example 7 of the present application. DETAILED DESCRIPTION

[0044] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0045] According to the first aspect of the present application, a detection device of isobutyraldehyde is provided, comprising an automatic sampling part, a catalytic luminescence reactor and a detection instrument.

[0046] The catalytic layer of the catalytic luminescence reactor comprises nano-barium titanate.

[0047] The detection device of isobutyraldehyde provided by the present application uses nano-barium titanate as the catalytic layer of the catalytic luminescence reactor. Isobutyraldehyde can have a catalytic luminescence reaction with nano-barium titanate to generate a light signal. The light signal generated during the catalytic luminescence is detected by the detection instrument, and then it is determined whether isobutyraldehyde is contained and its concentration. The detection device of the present application uses nano-barium titanate as the catalytic layer, and thus has the characteristics of high response sensitivity, good specificity and good stability. It can accurately detect the concentration of isobutyraldehyde gas in the air in real time and online, and has good reproducibility, rapid response and rapid recovery.

[0048] In a preferred embodiment, the nano-barium titanate of the present application includes barium titanate with a particle size of 86-2000 nm, and preferably barium titanate with a particle size of 116 nm, which has higher sensitivity, better stability and better reproducibility to isobutyraldehyde.

[0049] In a preferred embodiment, the automatic sampling part of the present application mainly consists of a push-pull syringe pump, a double-path VOCs generator and a six-way valve, which is more conducive to automatic sampling of the sample and realizes the purpose of full-automatic cyclic quantitative and timed sampling.

[0050] In the present application, the reaction cavity of the catalytic luminescence reactor includes but is not limited to a quartz tube, which is more conducive to the catalytic luminescence reaction of isobutyraldehyde in the sample in the catalytic luminescence reactor and the detection of the light signal.

[0051] In a preferred embodiment, the base of the quartz tube can be provided with a ceramic rod, wherein the surface of the ceramic rod is attached with nano-barium titanate as a catalytic layer, which is more conducive to the reaction of isobutyraldehyde in the sample with the catalytic layer.

[0052] In a preferred embodiment, the detection instrument of the present application mainly consists of a weak luminescence measuring instrument, a detector and a controller, wherein the model of the weak luminescence measuring instrument can be BPCL-1-TGC, which is more conducive to the detection of the light signal generated when isobutyraldehyde catalytically luminesces with nano-barium titanate.

[0053] The isobutyraldehyde detection device of the present application includes an automatic sampling part, a catalytic luminescence reactor and a detection instrument; wherein the automatic sampling part can first push isobutyraldehyde liquid into a double-path VOCs generator slowly through a push-pull syringe pump to generate high-concentration isobutyraldehyde gas, which is diluted into target-concentration isobutyraldehyde gas by a carrier gas stream, and then is sampled through a six-way valve to complete full-automatic cyclic quantitative and timed sampling; the catalytic luminescence reactor takes a quartz tube as a reaction cavity, and the base in the cavity can be a ceramic rod, the surface of which is attached with nano-barium titanate as a catalytic layer; the isobutyraldehyde gas stream enters from the gas inlet of the reaction cavity, reacts with the catalytic layer, and then flows out from the gas outlet of the reaction cavity; the detection instrument part includes a weak luminescence measuring instrument host (BPCL-1-TGC), a detector and a controller, which can accurately detect the light signal generated when isobutyraldehyde catalytically luminesces.

[0054] According to the second aspect of the present application, a method for detecting isobutyraldehyde by using the detection device of any one of the above is provided, which includes the following steps:

[0055] The sample is sampled by the automatic sampling part, catalytically reacts with the catalytic layer of the catalytic luminescence reactor, and the light signal generated during the catalytic reaction is detected by the detection instrument; when the detected light signal reaches a set value, it is determined that the sample contains isobutyraldehyde.

[0056] The method for detecting isobutyl aldehyde provided by the application has high response sensitivity, good specificity and good stability, and can accurately detect isobutyl aldehyde and its concentration in air in real time and on line.

[0057] In the application, the sample injection method includes but is not limited to sample injection through a six-way valve, and the effect of full-automatic cyclic quantitative and timed sample injection can be achieved.

[0058] According to a third aspect of the application, the application of the detection device of any one of the above in chemical production is provided.

[0059] The application of the detection device of isobutyl aldehyde provided by the application can effectively prevent the harm caused by isobutyl aldehyde in use, and has outstanding application effect.

[0060] The application will be further described below through examples. Unless otherwise specified, the materials in the examples are prepared according to the existing method or directly purchased from the market.

[0061] Example 1

[0062] A detection device of isobutyl aldehyde, comprising an automatic sample injection part, a catalytic luminescence reactor and a detection instrument;

[0063] The automatic sample injection part mainly comprises a push-pull injection pump, a double-path VOCs generator and a six-way valve, and the detection instrument mainly comprises a weak luminescence measuring instrument (BPCL-1-TGC), a detector and a controller;

[0064] The reaction cavity of the catalytic luminescence reactor is a quartz tube, and the base of the quartz tube is provided with a ceramic rod, and the surface of the ceramic rod is attached with nano barium titanate as a catalytic layer;

[0065] The nano barium titanate of the embodiment is mainly prepared by the following method:

[0066] 0.7663g of barium acetate is dissolved in 100mL of deionized water to obtain a barium acetate solution;

[0067] 1.0mL of tetrabutyl titanate is dissolved in 100mL of an ethanol solution to obtain a tetrabutyl titanate solution;

[0068] Under stirring conditions, the tetrabutyl titanate solution is added to the barium acetate solution to obtain a mixed solution, and the pH of the mixed solution is adjusted to 10.0 using NaOH, and stirred for 15min, and then evenly divided into three solutions, which are sequentially recorded as the first solution, the second solution and the third solution;

[0069] The first solution is added to 0.05 g of polyvinylpyrrolidone, stirred and dissolved, and then transferred to an autoclave, and reacted at a temperature of 120 DEG C for 24 h to obtain a precipitate, which is washed with deionized water and ethanol alternately for multiple times, and then placed in a vacuum drying oven and dried at a temperature of 100 DEG C for 24 h to obtain nano-barium titanate (denoted as BTO-1, with a particle size of 116 nm).

[0070] The specific structure of the detection device of the embodiment can refer to the patent application with the publication number CN 114249342 A (Nano-gamma-alumina, its preparation method and application in detecting 2-methylacrolein), and the main difference lies in that the sensitive materials used are different, the detection objects are different, and the detection conditions are different.

[0071] When the detection device of the embodiment is working, the sample passes through the six-way valve in the automatic sampling part, enters from the gas inlet of the reaction cavity of the catalytic luminescence reactor, reacts with the catalytic layer, and then flows out from the gas outlet of the reaction cavity. The detection instrument detects the light signal generated when isobutyl aldehyde catalytically reacts and emits light, so as to determine whether isobutyl aldehyde is contained in the sample and its concentration.

[0072] Example 2

[0073] The difference between the embodiment and example 1 lies in that the nano-barium titanate used in the catalytic layer of the catalytic luminescence reactor of the embodiment is mainly prepared by the following method:

[0074] The second solution obtained in example 1 is transferred to an autoclave, reacted at a temperature of 120 DEG C for 24 h to obtain a precipitate, which is washed with deionized water and ethanol alternately for multiple times, and then placed in a vacuum drying oven and dried at a temperature of 100 DEG C for 24 h. The obtained particles are crushed in a corundum mortar, and then calcined at 700 DEG C in a tube furnace under a nitrogen atmosphere for 3 h to obtain nano-barium titanate (denoted as BTO-2, with a particle size of 86 nm).

[0075] The rest is the same as example 1.

[0076] Example 3

[0077] The difference between the embodiment and example 1 lies in that the nano-barium titanate used in the catalytic layer of the catalytic luminescence reactor of the embodiment is mainly prepared by the following method:

[0078] The third solution obtained in example 1 is filtered after aging for 24 h, and washed with deionized water and ethanol alternately for multiple times. The obtained gel is placed in a vacuum drying oven and dried at a temperature of 100 DEG C for 24 h. The obtained particles are crushed in a corundum mortar, and then calcined at 700 DEG C in a tube furnace under a nitrogen atmosphere for 3 h to obtain nano-barium titanate (denoted as BTO-3, with a particle size of 2 um).

[0079] The rest are the same as Example 1.

[0080] Comparative Example 1

[0081] The difference between the present comparative example and Example 1 is that the nanomaterial used in the catalytic layer of the catalytic luminescence reactor of the present comparative example is tin oxide with a particle size of 50 nm, and the rest are the same as Example 1.

[0082] Comparative Example 2

[0083] The difference between the present comparative example and Example 1 is that the nanomaterial used in the catalytic layer of the catalytic luminescence reactor of the present comparative example is zirconium oxide with a particle size of 40 nm, and the rest are the same as Example 1.

[0084] Comparative Example 3

[0085] The difference between the present comparative example and Example 1 is that the nanomaterial used in the catalytic layer of the catalytic luminescence reactor of the present comparative example is iron oxide with a particle size of 20 nm, and the rest are the same as Example 1.

[0086] Test Example 1

[0087] The XRD patterns of BTO-1, BTO-2 and BTO-3 obtained in Examples 1-3, respectively, are shown in FIGS. 1-3, respectively. Figure 1 From FIGS. 1-3, it can be seen that BTO-1 and BTO-2 are cubic barium titanate, and BTO-3 is tetragonal barium titanate. Figure 1

[0088] The BET specific surface areas of BTO-1, BTO-2 and BTO-3 are 18.1 m 2 / g, 13.2 m 2 / g and 2.4 m 2 / g, respectively.

[0089] The scanning electron microscope (SEM) photos of BTO-1, BTO-2 and BTO-3 are shown in FIGS. 4-6, respectively. Figure 2 (BTO-1), Figure 3 (BTO-2) and Figure 4 (BTO-3), respectively. From the figures, it can be seen that the morphologies of BTO-1 and BTO-2 are nearly circular, and their particle sizes are about 116 nm and 86 nm, respectively, while BTO-3 has a nearly tetragonal morphology, and its particle size is about 2 um.

[0090] Test Example 2

[0091] The detection devices of Examples 1-3 and Comparative Examples 1-3 were used to detect isobutyl aldehyde gas with a concentration of 264 mg / m 3 under the conditions of a detection wavelength of 425 nm, a reaction temperature of 210°C and a carrier gas flow rate of 500 mL / min, and the catalytic luminescence signals of isobutyl aldehyde on the surfaces of different materials were obtained, and the results are shown in Table 1.​Figure 5 As shown, it can be seen that the detection device of Example 1 using barium titanate (BTO-1, particle size of 116 nm) as the catalyst layer has very high sensitivity to isobutyraldehyde, while the detection device of Example 2 using barium titanate (BTO-2, particle size of 86 nm) as the catalyst layer and the detection device of Example 3 using barium titanate (BTO-3, particle size of 2 um) as the catalyst layer have lower sensitivity to isobutyraldehyde, and the detection devices of Comparative Examples 1-3 using other materials (tin oxide with a particle size of 50 nm, zirconium oxide with a particle size of 40 nm, and iron oxide with a particle size of 20 nm, respectively) as the catalyst layer have the lowest sensitivity to isobutyraldehyde.

[0092] Test Example 3

[0093] The detection device of Example 1 was used to detect twenty kinds of gases, 1: isobutyraldehyde, 2: isobutyl alcohol, 3: n-butyraldehyde, 4: n-propyl aldehyde, 5: cyclopentanone, 6: cycloheptanone, 7: acetone, 8: formaldehyde, 9: acetaldehyde, 10: methanol, 11: ethanol, 12: CO, 13: CO2, 14: benzene, 15: o-xylene, 16: m-xylene, 17: tetrahydrofuran, 18: diphenyl ether, 19: phenetol, and 20: ethyl acetate, under the conditions of a detection wavelength of 425 nm, a reaction temperature of 210°C, and a carrier gas flow rate of 500 mL / min, wherein the concentration of isobutyraldehyde gas was 264 mg / m 3 , and the concentrations of the other gases were all 1000 mg / m 3 . The catalytic luminescence signals of different substances on the surface of barium titanate (BTO-1, particle size of 116 nm) were obtained, and the results are shown in Figure 6 As shown, it can be seen that isobutyraldehyde produces a strong catalytic luminescence signal, while isobutyl alcohol, n-butyraldehyde, and n-propyl aldehyde produce weak signals, and the other substances do not produce signals, which indicates that the detection device of Example 1 using barium titanate with a particle size of 116 nm as the catalyst layer has good specificity for detecting isobutyraldehyde gas.

[0094] Test Example 4

[0095] To achieve rapid response of the target substance is the premise of rapid detection. The detection devices of Example 1, Example 2, and Example 3 were used to respectively determine isobutyraldehyde gas with concentrations of 264 mg / m 3 , 396 mg / m 3 , and 790 mg / m 3 under the conditions of a detection wavelength of 425 nm, a reaction temperature of 210°C, and a carrier gas flow rate of 500 mL / min, and the obtained kinetic response curves are shown in Figure 7 , Figure 8 , and Figure 9 , wherein curve 1, curve 2, and curve 3 respectively correspond to 264 mg / m 3, 396 mg / m 3 and 790 mg / m 3 The results show that the luminescence signal increases with the increase of the concentration of isobutyraldehyde gas, but the curve shape is similar, and the luminescence signal of the detection device of Example 1 is the strongest at the same concentration, and the signal reaches the maximum value after the isobutyraldehyde gas is injected for an average of 2.5 seconds, and the signal returns to the baseline from the maximum value for about 5 seconds, which indicates that the detection device of Example 1 has a rapid response to isobutyraldehyde, has the advantages of fast determination speed, and recovers rapidly, so that repeated detection within a short time can be realized.

[0096] Test Example 5

[0097] In this test example, under the conditions of a detection wavelength of 425 nm, a reaction temperature of 210°C, and a carrier gas flow rate of 500 mL / min, the detection devices of Example 1, Example 2, and Example 3 were used to determine isobutyraldehyde standard gas samples with concentrations of 52 mg / m 3 , 132 mg / m 3 , 264 mg / m 3 , 396 mg / m 3 , 528 mg / m 3 , 632 mg / m 3 , 792 mg / m 3 , and 1052 mg / m 3 , respectively, three times in parallel, and linear regression was performed on the measured catalytic luminescence signals to obtain a standard curve, and the results are shown in Figure 10 , Figure 11 and Figure 12 , wherein the linear regression equation corresponding to the detection device of Example 1 is S = 1.135C - 56.12, the correlation coefficient R 2 = 0.993; the linear regression equation corresponding to the detection device of Example 2 is S = 0.42C + 2.46, the correlation coefficient R 2 = 0.997; and the linear regression equation corresponding to the detection device of Example 3 is S = 0.3C - 11.22, the correlation coefficient R 2 = 0.998; wherein S is the luminescence intensity, and C is the isobutyraldehyde concentration.

[0098] Test Example 6

[0099] In this test example, under the conditions of a detection wavelength of 425 nm, a reaction temperature of 210°C, and a carrier gas flow rate of 500 mL / min, the detection devices of Example 1, Example 2, and Example 3 were used to detect isobutyraldehyde gas with a concentration of 264.3 mg / m 3 , respectively, by continuous automatic sampling, and the results are shown in Table 2.Figure 13 , Figure 14 as well as Figure 15 As shown, the mean signal value of the detection device in Example 1 is 255.9, and the relative standard deviation is 4.0%, indicating good reproducibility. The mean signal value of the detection device in Example 2 is 97.7, and the relative standard deviation is 5.6%. The mean signal value of the detection device in Example 3 is 79.4, and the relative standard deviation is 4.6%, indicating good reproducibility. The detection limit was calculated using the formula 3σ / ρ, where σ is the standard deviation of the background value and ρ is the slope of the standard curve. The detection limits for isobutyraldehyde for the detection devices in Examples 1, 2, and 3 are 7.3 mg / m³, respectively. 3 19.7 mg / m 3 and 34.7 mg / m 3 It can be seen that the detection device of Example 1 has the lowest detection limit for isobutyraldehyde.

[0100] Experimental Example 7

[0101] In this experimental example, under the conditions of a detection wavelength of 425 nm, a reaction temperature of 210 °C, and a carrier gas flow rate of 500 mL / min, the concentration of 264 mg / mL was continuously measured for 14 days using the detection devices of Examples 1, 2, and 3. 3 The trend of the obtained signal change for isobutyraldehyde gas is as follows: Figure 16 , Figure 17 as well as Figure 18 As shown, the relative standard deviation of the results obtained by the detection device in Example 1 is 1.4%, the relative standard deviation of the results obtained by the detection device in Example 2 is 1.2%, and the relative standard deviation of the results obtained by the detection device in Example 3 is 1.7%, indicating that the detection devices of Examples 1, 2, and 3 have good stability, which provides a guarantee for online long-term accurate monitoring of isobutyraldehyde concentration.

[0102] Experimental Example 8

[0103] To further verify the application value of the detection device of the present invention, air samples were collected near the isobutyraldehyde storage cabinet in this experiment. 1 mL of each air sample was extracted and measured first using a gas chromatograph-mass spectrometer, and then measured using the detection device of Example 1 of the present invention. The results of both measurements are shown in Table 1. Using the result obtained by gas chromatography as the true value, a comparison with the result measured by the detection device of Example 1 shows that the absolute value of the relative error is less than 10%, proving that the detection device of the present invention can accurately determine isobutyraldehyde and has good application prospects.

[0104] Table 1

[0105] Serial number Gas chromatography (mg / m 3 )]]> The method of the invention (mg / m 3 )]]> Relative error (%) 1 79.4±19.3 72.6±1.14 -8.4 2 268.9±13.6 280.5±11.5 4.3 3 419.4±15 435.8±26.2 3.9

[0106] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting isobutyraldehyde, characterized in that, Includes an automated sample introduction unit, a catalytic luminescence reactor, and detection instruments; The catalytic layer of the catalytic luminescence reactor includes nano-barium titanate; The nano-barium titanate is barium titanate with a particle size of 116 nm.

2. The detection device according to claim 1, characterized in that, The automatic sample injection unit mainly consists of a push-pull injection pump, a dual-channel VOCs generator, and a six-way valve.

3. The detection device according to claim 1, characterized in that, The reaction chamber of the catalytic light-emitting reactor includes a quartz tube.

4. The detection device according to claim 3, characterized in that, The quartz tube has a ceramic rod on its base; The surface of the ceramic rod is coated with the nano-barium titanate as a catalytic layer.

5. The detection device according to claim 1, characterized in that, The detection instrument mainly consists of a weak light emission measuring instrument, a detector, and a controller.

6. The detection device according to claim 5, characterized in that, The weak light emission measuring instrument is model BPCL-1-TGC.

7. A method for detecting isobutyraldehyde using the detection device according to any one of claims 1-6, characterized in that, Includes the following steps: The sample is introduced through the automatic sample introduction section and undergoes a catalytic reaction with the catalytic layer of the catalytic luminescence reactor. The light signal generated during the catalytic reaction is detected by the detection instrument. When the detected light signal reaches a set value, it is determined that the sample contains isobutyraldehyde.

8. The method according to claim 7, characterized in that, The method of sample introduction includes sample introduction via a six-way valve.

9. The application of the detection device according to any one of claims 1-6 in chemical production.

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