A vapor generating and mixing apparatus and a method thereof

Abstract

The present disclosure discloses a vapor generating and mixing apparatus and a method for generating vapor. The apparatus comprises a syringe (102) to store a liquid for conversion to vapor, where the syringe (102) comprises a plunger to dispense the liquid from the syringe (102), a syringe pump to deliver a predefined amount of the liquid from the syringe (102) at a specific flow rate, and a heating chamber having a glass bore to insert a tip of the syringe (102), where the heating chamber is heated by a hot air stream to convert the delivered liquid to vapor. Further, the apparatus comprises a vapor delivery system having a tube to transport vapor from the heating chamber to an application point, where the vapor delivery system comprises one or more flow controllers (104, 106) to regulate the flow of the vapor to the application point.

Description

A VAPOR GENERATING AND MIXING APPARATUS AND A METHOD THEREOFTECHNICAL FIELD

[0001] The present disclosure relates to generation of vapor concentrations of a chemical. In particular, the present disclosure provides a vapor generating and mixing apparatus and a method for vapor generation in the presence of an interference, and monitoring of vapor concentration of the generated vapor.BACKGROUND

[0002] Quantitative vapor generation plays a pivotal role in diverse fields, such as analytical chemistry, environmental science, and material science. This technique involves the controlled production of a known quantity of vapor from a sample, enabling the measurement and determination of the concentration of specific substances. Widely employed for detector assessment, particularly in analytical chemistry and environmental monitoring, it aims to evaluate detector performance concerning precision, accuracy, linearity, and stability in generating precise concentrations of compounds of interest.

[0003] Chemical detectors find extensive applications in environmental monitoring, process control, and safety protocols to identify and quantify specific compounds. To ensure reliable measurements, various performance parameters like limit of detection (LOD), limit of quantification (LOQ), selectivity, response time, recovery time, and dynamic range are crucial. Detector evaluation commonly involves creating a calibration curve, gauging the detector's response to known compound concentrations. This curve is then applied to determine compound concentrations in actual samples, necessitating high precision, accuracy, linearity, and stability for low concentrations. An alternative method employs a standard reference material with a certified compound amount, comparing the detector's response to the certified value to assess accuracy and precision.

[0004] Efforts have been made in the art for quantitative vapor generation. For example, Patent document US3521865A discloses an improved method and apparatus for producing gas having an accurately known vapor concentration. Such a gas is useful in the calibration of gas analysers. The method and apparatus of this invention are of the type in which a material contacts one side of a membrane having a known permeability to that material, permeates the membrane, and diffuses into a diluent material on the other side ofthe membrane. In the instant invention the permeating material surrounds the outside of a permeable tube, permeates the tube, and diffuses into a gas flowing through the tube.

[0005] Another Patent document US9506898B1 discloses a device for generating vapor concentrations of a chemical and more particularly to a device and method for generating vapor concentrations of a chemical utilizing a reservoir. It describes a device and method for generating vapor concentrations of a chemical. The device comprises a reservoir including a mixing chamber and a delta tube inlet section attached to the mixing chamber for supplying a first mixture of carrier gas and a vapor of the chemical to the mixing chamber. A dilution gas inlet section is also attached to the mixing chamber and supplies a stream of dilution gas to the mixing chamber to blend with the first mixture of the carrier gas and the vapor of the chemical resulting in a second mixture of the carrier gas, the vapor of the chemical, and the dilution gas. An exit port section attached to the mixing chamber directs the second mixture of the carrier gas, the vapor of the chemical, and the dilution gas to an analyser or system after it emerges from the reservoir.

[0006] Another Patent document US8778060B2 discloses vapour generators including a chamber in which vapor is produced, an inlet by which gas can enter the chamber, and a chamber outlet by which vapour can flow out of the chamber. The process uses a diffusion cell to generate a controlled concentration of the toxic compounds, which is mixed with a carrier gas to produce a standard gas mixture.

[0007] Yet Another Patent document US5616822A discloses systems providing an accurately variable known concentration of one gas in the mainstream of another gas, and is particularly concerned with such systems for use in calibrating instruments such as gas detection devices. Another method is evaporation which involves exposing a liquid to the airflow and allowing it to control evaporate to generate a controlled concentration of vapor.

[0008] However, the above-mentioned prior-art references do not focus on vaporizing liquid chemicals or pollutants for delivery of precise, accurate, and low to high vapor concentration along with interference. There is, therefore, a need to provide an optimum solution that can obviate the above-mentioned limitations and provide an efficient and improved apparatus and method for vaporizing liquid chemicals or pollutants for delivery of precise, accurate, and low to high vapor concentration along with interference and concentration profile of the vapor for an extended time.OBJECTS OF THE PRESENT DISCLOSURE

[0009] A general object of the present disclosure is to provide an effective solution that obviates the existing limitations by providing an apparatus and method for vaporising liquid chemicals or pollutants for delivery of precise, accurate, and low to high vapor concentration along with interference and concentration profde of the vapor for an extended time.

[0010] An object of the present disclosure is to provide an apparatus capable of delivering precise amounts of liquid at specific flow rates.

[0011] An object of the present disclosure is to provide an apparatus for optimizing vaporisation efficiency and stability.

[0012] An object of the present disclosure is to provide an apparatus for regulating vapor flow to an application point for enhanced precision.

[0013] An object of the present disclosure is to provide an apparatus for interference mixing, allowing perpendicular mixing of carrier gases and analytes to reduce interference.SUMMARY

[0014] Aspects of the present disclosure relate to generation of vapor concentrations of a chemical. In particular, the present disclosure provides a vapor generating and mixing apparatus and a method for vapor generation in the presence of an interference, and monitoring of vapor concentration of the generated vapor.

[0015] According to an aspect, the present disclosure pertains to a vapor generating and mixing apparatus. The apparatus includes a syringe to store a liquid for conversion to vapor and the syringe comprises a plunger to dispense the liquid from the syringe. The apparatus further includes a syringe pump to deliver a predefined amount of the liquid from the syringe at a specific flow rate and a heating chamber having a glass bore to insert a tip of the syringe, the heating chamber is heated by a hot air stream to convert the delivered liquid to vapor. In addition, the apparatus includes a vapor delivery system having a tube to transport vapor from the heating chamber to an application point, and the vapor delivery system comprises one or more flow controllers to regulate the flow of vapor to the application point.

[0016] In an aspect, the apparatus further includes a mixing chamber to mix an interference line and a carrier gas with an analyte and allow two or more carrier gases to mix at an exposure point in a perpendicular direction to the flow of the interference, and achemical detector to determine a concentration profile of the vapor by measuring the concentration of a target analyte at different points with a predefined duration of time.

[0017] In an aspect, the apparatus further includes an electronic control system with a computer and / or an electronic device to automate the generation of vapor.

[0018] In an aspect, the syringe is made of glass or plastic and the heating chamber is a metal block heated by the hot air stream at a specific temperature. Further, the application point is a testing chamber or a sensor and the chemical detector is a flame photometry-based generic chemical detector.

[0019] In an aspect, the concentration profile determined by the chemical detector is analysed using gas chromatography or a gas sensor.

[0020] In an aspect, the mixing chamber comprises an extended Teflon line, a Polytetrafluoroethylene (PTFE) bag containing interference and a switch.

[0021] According to another aspect, the present disclosure pertains to a method for generating vapor. The method includes selecting an organic liquid compound for vaporization, filling a syringe with the organic liquid compound and connecting the syringe to a syringe pump for delivery of the organic liquid compound at a specific flow rate. In addition, the method includes controlling the flow rate of syringe pump and temperature of a heating chamber for converting the delivered organic liquid compound to vapor and transporting the converted vapor from the heating chamber through a tube to an application point through an inert gas. Further, the method includes determining and measuring concentration of the vapor using gas chromatography or a gas sensor functioning as the application point.

[0022] In another aspect, the method further includes comparing the measured concentration of the vapor to a predicted concentration based on a volume of the container and the amount of the organic liquid compound filled in the syringe.

[0023] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with accompanying drawing figures in which like numerals represent like components.BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification.The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0025] FIG. 1 illustrates an exemplary schematic diagram proposed vapor generating and mixing apparatus, in accordance with the embodiments of the present disclosure.

[0026] FIGS. 2A-2D illustrate exemplary schematic diagrams of quantitative vapor generator, interference mixing apparatus, a customized environmental chamber, and a concentration profile measure of the proposed vapor generating and mixing apparatus, in accordance with the embodiments of the present disclosure.

[0027] FIG. 3 illustrates an exemplary flow diagram of the proposed method for generating vapor, in accordance with the embodiments of the present disclosure.DETAILED DESCRIPTION

[0028] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such details as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternative falling within the spirit and scope of the present disclosures as defined by the appended claims.

[0029] Embodiments explained herein relate to generation of vapor concentrations of a chemical. In particular, the present disclosure provides a vapor generating and mixing apparatus and a method for vapor generation in the presence of an interference, and monitoring of vapor concentration of the generated vapor.

[0030] Dynamic dilution helps in maintaining a constant and accurate vapor concentration, which is crucial for many analytical applications. By adding a diluent gas, the syringe drive method can ensure that the vapor concentration remains constant throughout the experiment, leading to improved accuracy and precision. Dynamic dilution is a technique used in vapor generation to improve the accuracy and precision of vapor concentration. It involves the continuous addition of diluent gas to the vapor stream to dilute the vapor and maintain a constant and accurate concentration, incorporating dynamic dilution into the syringe drive method of vapor generation offers several advantages over other methods.

[0031] The syringe drive method is already known for its low sample consumption. By incorporating dynamic dilution, the amount of sample required for the experiment was further reduced. This is because the diluent gas is used to adjust the vapor concentration, which means that fewer samples may be needed to achieve the desired concentration. Thesyringe drive method with dynamic dilution is used with a wide range of samples, including liquids, and gases. This versatility makes it a useful tool in many different applications, including environmental monitoring, pharmaceuticals, and chemical analysis. It is a relatively inexpensive technique compared to other vapor generation methods. The cost of the equipment is low, and the sample consumption is minimal, which helps reduce the overall cost of the analysis.

[0032] The technique involves injecting a small volume of liquid pollutant perpendicular to the direction of the primary linear dynamic flow of clean air using a micro syringe. The clean air flow carries the liquid pollutant downstream and has improvisation over other methods such as by injecting the liquid pollutant perpendicular to the airflow, it can be more uniformly dispersed in the downstream air stream. This can improve the accuracy of the analysis by ensuring that the pollutant is evenly distributed throughout the sample. The use of a micro syringe can help reduce the number of liquid pollutants required for the analysis, which can be particularly beneficial when working with expensive or limited samples. This technique can be used with a wide range of liquid pollutants, making it a versatile tool in many different applications. The use of clean air flow can be compatible with other analytical methods, such as mass spectrometry or gas chromatography. This can help improve the accuracy and reliability of the analysis.

[0033] The size of the micro syringe tip has an impact on the delivery of liquid to convert into vapor. A smaller tip size results in finer droplets being injected into the air stream, which facilitates faster evaporation and the production of smaller vapor particles. This is particularly useful in applications where a high level of precision is required, such as in analytical chemistry or environmental monitoring and the size of the tip also needs to be balanced against the required delivery volume. Smaller tip sizes limit the volume of liquid delivered, which is a drawback if larger sample volumes are needed. In this case, a larger tip size may be more appropriate.

[0034] Another factor to consider is the viscosity of the liquid. More viscous liquids may require a larger tip size to ensure adequate delivery, while less viscous liquids can be delivered through a smaller tip size. It's also important to note that the conversion of liquid to vapor is not solely determined by the micro syringe tip size. Other factors, such as the temperature and humidity of the environment, the surface area of the liquid exposed to the air stream, and the airflow rate, can also influence the rate of evaporation and the production of vapor.

[0035] Referring to FIG. 1, in an embodiment, the proposed vapor generating and mixing apparatus is disclosed. The vapor generating and mixing apparatus can include a syringe 102 to store a liquid for conversion to vapor and the syringe 102 can further include a plunger to dispense the liquid from the syringe 102. The apparatus can further include a syringe pump to deliver a predefined amount of the liquid from the syringe 102 at a specific flow rate and a heating chamber having a glass bore to insert a tip of the syringe 102. The heating chamber can be heated by a hot air stream to convert the delivered liquid to vapor. In addition, the apparatus can include a vapor delivery system having a tube to transport the vapor from the heating chamber to an application point, and the vapor delivery system can further include one or more flow controllers 104, 106 to regulate the flow of the vapor to the application point.

[0036] Further, the apparatus can include a mixing chamber 108 to mix an interference line 110 and a carrier gas 112 with an analyte and allow two or more carrier gases to mix at an exposure point 114 in a perpendicular direction to the flow of the interference, and a chemical detector 116 to determine a concentration profile of the vapor by measuring the concentration of a target analyte at different points with a predefined duration of time.

[0037] In an embodiment, the apparatus can further include an electronic control system with a computer 118 and / or an electronic device to automate the generation of vapor.

[0038] In an embodiment, the syringe 102 can be made of glass or plastic and the heating chamber can be a metal block heated by the hot air stream at a specific temperature.

[0039] In an embodiment, the application point can be a testing chamber or a sensor and the chemical detector 116 can be a flame photometry -based generic chemical detector.

[0040] In an embodiment, the concentration profile determined by the chemical detector 116 can be analysed using gas chromatography or a gas sensor.

[0041] In an embodiment, the mixing chamber 108 can include an extended Teflon 120 line, a Polytetrafluoroethylene (PTFE) bag containing interference 110 and a switch.

[0042] Referring to FIGS. 2A-2D, in an embodiment, the apparatus 100 can include a temperature sensor and controller 122, humidifier and sensor 124, mass flow controller 104, 106 to control precision of airflow primary dilution line 126, carry contaminated air secondary dilution line 128 containing non-contaminated air stream and syringe drive unit 102 dispensing a precise flow into airflow stream. Further, multiple vapor challenge points 13 can be involved to expose a detector to a known concentration of chemical agent vapor and measuring the response. The concentration of the vapor can be adjusted by dilution line(primary and secondary) to test the detector’s sensitivity to a different level of exposure. Each exposure points 130 and 114 can facilitate a continuous flow of air and a contaminated air mixture flow at atmospheric pressure in the range of 100 to 5000 mL per minute.

[0043] In an embodiment, the exposure points can be adjusted to extend using a Teflon line 120 with an open-end enclosure cap. The exposure point can have a provision to change over to a contamination-free airline and contaminated air mixture line by using a changeover valve. The exposure points can be extendable lines using an open-end cap to overcome carrying carrier gas 112 to the exposure chamber. Multiple exposure points can also facilitate the collection of pollutants 132, 134 simultaneously to expose the detector to overcome offline non-realistic operation.

[0044] It should be obvious to a person skilled in the art that some detectors can produce false positives or false negatives when exposed to certain substances that are similar to chemical agents. Interference testing provided by the proposed apparatus can involve a Tedlar bag 110, Teflon linel20, sampling pump 27, pump inlet 150, pump output 152 to deliver the controlled volume of interference exposing the detector to a range of substances that could potentially interfere with its performance, such as common chemicals found in industrial or house settings, to determine the detector’s ability to distinguish between chemical agents and harmless substances.

[0045] In an embodiment, the apparatus 100 can include a dynamic mixing chamber 108 for mixing interference line 110 to carrier gas 112 with an analyte before exposing the point to remove the effect on the performance of a chemical detector 116 by reducing its sensitivity. The dynamic mixing chamber 108 can allow two or more carrier gases flow 114 to mix in a perpendicular direction to the flow of interference.

[0046] In an embodiment, the apparatus 100 can include an environmental chamber with a gas injection 136, extraction 138, injection chamber, extraction chamber 140, challenge chamber point, temperature sensor 142, humidity sensor 144, temperature controller 146 to simulate and control various environmental conditions such as temperature, humidity, pressure, and gas concentration levels to test the performance of chemical detectors in the presence of different chemical agents.

[0047] In an exemplary embodiment, the apparatus 100 can include control valves 154, 172 to control the flow of the liquid, reference lines 156, 158 a vent line 160 to direct the flow of the liquid, a source gas 162, a source gas carrier 164, a cable 174 connecting the chemical detector 116 with the computer 118, a nose 166 to direct the mixed interference lineand the carrier gas to the chemical detector 116, an environmental chamber inlet 168, and a contamination carrier line 176.

[0048] Referring to FIG. 3, in an embodiment, a method 300 for generating vapor is disclosed. Method 300 can include step 302 of selecting an organic liquid compound for vaporisation. In addition, the method 300 can include step 304 of fdling a syringe with the organic liquid compound. Further, the method 300 can include step 306 of connecting the syringe to a syringe pump for delivery of the organic liquid compound at a specific flow rate.

[0049] At step 308, the method 300 can include controlling the flow rate of the syringe pump and temperature of a heating chamber for converting delivered organic liquid compound to vapor. The method 300 can include step 310 of transporting the converted vapor from the heating chamber through a tube to an application point through an inert gas. Further, the method 300 can include step 312 of determining and measuring concentration of the vapor using gas chromatography or a gas sensor functioning as the application point. At step 312, the method 300 can further include comparing the measured concentration of the vapor to a predicted concentration based on a volume of the container and the amount of the organic liquid filled in the syringe.Exemplary Scenario

[0050] Using the syringe, the syringe pump, and the rotameter parameters as well as taking advantage of the physical and chemical characteristics of the compound of interest, it is possible to calculate a desired concentration of a gas (CFINAL) using the following formula:CFINAL (mg / m3) = [(FSYR x 1000 x dCOMPD x A-%) / (FAIR x 60 x 100)] where FSYR is the injection rate of the compound from the syringe pump (pl / h), 1000 is the conversion constant (pl / h => ml / h), dCOMPD is compound density (g / cm3@20 - 25°C), A-% is assayed (i.e. purity-%) of the compound, usually quite close to 100 %, FAIR is the sum of airflow (1pm), 60 is conversion constant (1 / min => 1 / h), 100 is conversion constant (%- value => decimal value)The desired concentration can also be stated in ppm using the following formula:CFINAL (ppm) = [CFINAL (mg / m3) x 24.46] / M, where 24.46 is the molar volume (dm3 / mol) of an ideal gas, calculated from V / n = RT / P when T = 298. 15K (25°C) and P = 101.325 kPa, M is the compound molecular mass (g / mol).Examples

[0051] The present invention is further explained in the form of the following examples. However, it is to be understood that the following examples are merely illustrative and are not be taken as limitations upon the scope of the invention.

[0052] Example: 1Producing acetone with a purity of 97-% (M = 58.1 g / mol, d = 0.79 g / cm3) in liquid form Hamilton's 10 pl syringe at a rate of 10 pl / h, FAGENT = 0.2 1pm and FDIL = 4.0 1pm is used. What is the vapor concentration of acetone stated as mg / m3and ppm?CFINAL (mg / m3) = [(10 pl / h x 1000 x 0.79 g / cm3x 97) / (4.2 l / min x 60 x 100)] = 30.41 mg / m3CFINAL (ppm) = (30.41 mg / m3 x 24.5) / (58.1 g / mol) = 14.51 ppm @ 25°C

[0053] Example: 2DMMP (Dimethyl methyl phosphonate) of 98% purity (M=124.06 g / mol, d=l .15 g / cm3) in liquid form, Hamilton’s lOpl syringe at a rate of 10 pl / h, FAGENT = 0.2 1pm and FDIL = 4.0 1pm is used.CFINAL (mg / m3) = [(10 pl / h x 1000 x 1.15 g / cm3x 98) / (4.2 l / min x 60 x 100)] = 44.72 mg / m3CFINAL (ppm) = (44.72 mg / m3x 24.5) / (124.06 g / mol) = 8.83 ppm @ 25°C

[0054] Example: 3Sarin (Chemical warfare nerve agent) of 98% purity (M=140.09 g / mol, d=1.09 g / cm3) in liquid form, Hamilton’s 10 pl syringe at a rate of 1 pl / h, FAGENT = 0.2 1pm and FDIL = 4.0 1pm is used.CFINAL (mg / m3) = [(1 pl / h x 1000 x 1.09 g / cm3x 98) / (4.2 l / min x 60 x 100)] = 4.23 mg / m3CFINAL (ppm) = (0.423 mg / m3x 24.5) / (140.09 g / mol) = 0.741 ppm @ 25°C

[0055] In an example, an appropriate chamber large enough can be selected to accommodate the chemical detectors and samples being tested. The chamber can maintain the desired temperature, humidity, and gas concentration levels. The environmental chamber has temperature and humidity control systems or installed a temperature control system, such as a heater, cooler, or thermoelectric device, to maintain the desired temperature inside the chamber.

[0056] Further, a humidifier or dehumidifier can be installed to control the humidity levels inside the chamber. Installed gas injection and extraction systems introduce chemical agents into the chamber. The installed gas injection system can be used to introduce known concentrations of the chemical agents being tested. An extraction system can be installed toremove the chemical agents from the chamber after testing is complete. The apparatus can contain installed sensors and monitoring systems sensors to monitor temperature, humidity, gas concentration levels, and other relevant parameters inside the chamber. These sensors can be connected to a computerized monitoring system that records and tracks the data over time. Before using the chamber for chemical detection testing, they can validate the performance of the environmental chamber by performing a series of calibration tests on the chemical detectors. Further, chemical agents can be introduced into the chamber at various concentrations and the chemical detectors' performance can be tested in detecting and measuring the concentration of the agents at different temperature and humidity levels.

[0057] Therefore, the proposed vapor generating and mixing apparatus 100 and method 300 for generating vapor provide an efficient solution for vaporization of liquid chemicals or pollutants to deliver precise, accurate and low to high vapor concertation along with an interference and concentration profile of the vapor for a long period of time.

[0058] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.ADVANTAGES OF THE PRESENT DISCLOSURE

[0059] The present disclosure provides a vapor generating and mixing apparatus with a syringe and syringe pump combination to allow precise control over the amount and flow rate of the liquid, ensuring accurate and controlled vapor generation.

[0060] The present disclosure provides a vapor generating and mixing apparatus with a heating chamber to facilitate efficient vaporization of delivered liquid, contributing to consistent and reliable vapor production.

[0061] The present disclosure provides a vapor generating and mixing apparatus with an electronic control system to enable automation of the vapor generation process, improving efficiency and reducing the need for manual intervention.

[0062] The present disclosure provides a vapor generating and mixing apparatus utilizing a flame photometry-based generic chemical detector to enhance the accuracy of concentration profile determination, providing reliable measurements of the target analyte.

[0063] The present disclosure provides a vapor generating and mixing apparatus with one or more flow controllers in the vapor delivery system to ensure precise regulation of vapor flow to the application point, enhancing the overall control and accuracy of the process.

Claims

We Claim:

1. A vapor generating and mixing apparatus (100), said apparatus (100) comprising: a syringe (102) to store a liquid for conversion to vapor, wherein the syringe (102) comprises a plunger to dispense the liquid from the syringe (102); a syringe pump to deliver a predefined amount of the liquid from the syringe (102) at a specific flow rate; a heating chamber having a glass bore to insert a tip of the syringe (102), wherein the heating chamber is heated by a hot air stream to convert the delivered liquid to vapor; and a vapor delivery system having a tube to transport vapor from the heating chamber to an application point, wherein the vapor delivery system comprises one or more flow controllers (104, 106) to regulate the flow of the vapor to the application point.

2. The apparatus (100) as claimed in claim 1, wherein the apparatus (100) comprises: a mixing chamber (108) to mix an interference line (110) and a carrier gas (112) with an analyte and allow two or more carrier gases to mix at an exposure point (114) in a perpendicular direction to the flow of the interference; and a chemical detector (116) to determine a concentration profile of the vapor by measuring the concentration of the target analyte at different points with a predefined duration of time.

3. The apparatus (100) as claimed in claim 1, wherein the apparatus (100) comprises an electronic control system with a computer (118) and / or an electronic device to automate the generation of vapor.

4. The apparatus (100) as claimed in claim 1, wherein the syringe (102) is made of glass or plastic and the heating chamber is a metal block heated by the hot air stream at a specific temperature.

5. The apparatus (100) as claimed in claim 1, wherein the application point is a testing chamber or a sensor.

6. The apparatus (100) as claimed in claim 1, wherein the chemical detector (116) is a flame photometry -based generic chemical detector.

7. The apparatus (100) as claimed in claim 1, wherein the concentration profile determined by the chemical detector (116) is analysed using gas chromatography or a gas sensor.

8. The apparatus (100) as claimed in claim 1, wherein the mixing chamber (108) comprises an extended Teflon line (120), a Polytetrafluoroethylene (PTFE) bag containing interference (110) and a switch.

9. A method (300) for generating vapor, said method (300) comprising: selecting (302), an organic liquid compound for vaporization; filling (304), a syringe with the organic liquid compound; connecting (306), the syringe to a syringe pump for delivery of the organic liquid compound at a specific flow rate; controlling (308), the flow rate of the syringe pump and temperature of a heating chamber for converting the delivered organic liquid compound to vapor; transporting (310), the converted vapor from the heating chamber through a tube to an application point through an inert gas; and determining and measuring (312), concentration of the vapor using gas chromatography or a gas sensor functioning as the application point.

10. The method (300) as claimed in claim 1, wherein the method (300) further comprises comparing the measured concentration of the vapor to a predicted concentration based on a volume of the container and the amount of the organic liquid compound filled in the syringe.

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