CN106324166B - A kind of gas chromatography detector - Google Patents
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- 238000004817 gas chromatography Methods 0.000 title claims abstract description 10
- 238000012856 packing Methods 0.000 claims abstract description 37
- 239000003054 catalyst Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000010453 quartz Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
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- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000005909 Kieselgur Substances 0.000 claims description 3
- 239000011029 spinel Substances 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
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- 229910010272 inorganic material Inorganic materials 0.000 claims description 2
- 239000011147 inorganic material Substances 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims 2
- 239000011810 insulating material Substances 0.000 claims 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 35
- 239000012159 carrier gas Substances 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000007084 catalytic combustion reaction Methods 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 239000012855 volatile organic compound Substances 0.000 abstract description 3
- 229910001872 inorganic gas Inorganic materials 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000012491 analyte Substances 0.000 description 2
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910017771 LaFeO Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001444 catalytic combustion detection Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 1
- 230000005264 electron capture Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
本发明公开了一种气相色谱检测器，包括加热块、气路管、参比填料、测温元件、催化剂填料、绝热层、腔体、信号处理系统等组件。使用空气作为载气和尾吹气，色谱系统流出物在载气带动下迅速依次通过参比填料和催化剂填料，流出物催化燃烧放出热量使催化剂填料温度升高，经测温元件将温度变化转化为电信号输出。该检测器可以通过改变催化剂填料的化学性能，构建通用型检测器或选择性检测器。该检测器具有灵敏度高、响应快的特点，可用于可挥发性有机物和可燃烧无机气体的检测。The invention discloses a gas chromatography detector, which comprises components such as a heating block, a gas pipe, a reference filler, a temperature measuring element, a catalyst filler, a heat insulating layer, a cavity, and a signal processing system. Using air as the carrier gas and make-up gas, the effluent of the chromatographic system is driven by the carrier gas to pass through the reference packing and the catalyst packing in sequence. The catalytic combustion of the effluent releases heat to increase the temperature of the catalyst packing, and the temperature change is converted by the temperature measuring element. output as an electrical signal. The detector can be used to construct a general-purpose detector or a selective detector by changing the chemical properties of the catalyst filler. The detector has the characteristics of high sensitivity and fast response, and can be used for the detection of volatile organic compounds and combustible inorganic gases.
Description
技术领域technical field
本发明涉及测量检测领域，具体地涉及一种基于催化燃烧原理的气相色谱检测器，该检测器可用于挥发性有机物和可燃烧无机气体的检测。The invention relates to the field of measurement and detection, in particular to a gas chromatography detector based on the principle of catalytic combustion, which can be used for the detection of volatile organic compounds and combustible inorganic gases.
背景技术Background technique
气相色谱检测器是气相色谱仪的关键器件，它直接决定了气相色谱分析的灵敏度、线性范围等重要分析性能。目前，常用的气相色谱检测器包括热导池检测器(TCD)、电子捕获检测器(ECD)、火焰离子化检测器(FID)、火焰光度检测器(FPD)和火焰热离子检测器(FTD)等。The gas chromatographic detector is the key device of the gas chromatograph, which directly determines the important analytical performance such as the sensitivity and linear range of the gas chromatographic analysis. Currently, commonly used gas chromatographic detectors include thermal conductivity cell detector (TCD), electron capture detector (ECD), flame ionization detector (FID), flame photometric detector (FPD) and flame thermionic detector (FTD). )Wait.
TCD通常使用氢气、氦气作为载气，FID、FPD除了使用氢气、氮气、氩气或者氦气作为载气外，还需要氢气作为燃烧气、空气或者氧气作为助燃气。ECD通常使用氮气、氢气、氩气或者氦气作为载气。由于气瓶的限制，使得以上检测器不仅存在安全隐患而且不利于作为便携式检测器使用。随着野外现场检测需求的不断增加，迫切需要以空气作载气的便携式检测器。TCD usually uses hydrogen and helium as carrier gas, while FID and FPD use hydrogen, nitrogen, argon or helium as carrier gas, hydrogen as combustion gas, air or oxygen as supporting gas. ECD typically uses nitrogen, hydrogen, argon, or helium as the carrier gas. Due to the limitation of gas cylinders, the above detectors not only have potential safety hazards but also are unfavorable for use as portable detectors. With the increasing demand for field detection, there is an urgent need for portable detectors that use air as the carrier gas.
基于催化燃烧的检测技术是利用分析物在催化剂的作用下，与空气发生燃烧反应，反应放出的热量使催化剂温度升高，通过测定催化剂的温度变化对分析物进行检测的技术。这种技术只需空气参与，是构建便携式检测器的理想技术。目前，基于催化燃烧的传感器已有报道，但普遍存在响应时间长、灵敏度低的缺点。南京工业大学的高国强、黄彩霞发明了基于热敏电阻的催化燃烧型一氧化碳传感器(专利号：CN 102706923 A)。由于其将催化剂烧结在热敏电阻表面形成催化珠，被测气体在催化剂表层发生反应，而测温元件却位于催化剂内部，导致测温元件不能真实、及时地反映催化燃烧引起的温升，进而使得传感器的响应时间较长，灵敏度较低。因此，这种结构的催化燃烧检测方式仍不能满足气相色谱检测的需要。The detection technology based on catalytic combustion is to use the analyte to undergo a combustion reaction with air under the action of a catalyst, and the heat released by the reaction increases the temperature of the catalyst, and detects the analyte by measuring the temperature change of the catalyst. This technique requires only air to participate and is an ideal technique for building portable detectors. At present, sensors based on catalytic combustion have been reported, but they generally have the disadvantages of long response time and low sensitivity. Gao Guoqiang and Huang Caixia from Nanjing University of Technology invented a catalytic combustion carbon monoxide sensor based on a thermistor (patent number: CN 102706923 A). Because the catalyst is sintered on the surface of the thermistor to form catalytic beads, the gas to be measured reacts on the surface of the catalyst, but the temperature measuring element is located inside the catalyst, so the temperature measuring element cannot reflect the temperature rise caused by catalytic combustion in a true and timely manner. The response time of the sensor is longer and the sensitivity is lower. Therefore, the catalytic combustion detection method with this structure still cannot meet the needs of gas chromatography detection.
发明内容Contents of the invention
为了解决上述技术问题，本发明的目的在于提供一种使用空气作为载气的气相色谱检测器，同时具有快速响应和高灵敏度的特点，以满足现场、便携的需求。In order to solve the above technical problems, the purpose of the present invention is to provide a gas chromatographic detector using air as a carrier gas, which has the characteristics of fast response and high sensitivity, so as to meet the needs of field and portability.
为实现上述目的，本发明采用技术方案为：In order to achieve the above object, the technical solution adopted by the present invention is:
本发明提供一种气相色谱检测器：由加热块、气路管、参比填料、第一测温元件、第二测温元件、催化剂填料、第一绝热层、第二绝热层、腔体、信号处理系统组成；所述腔体为圆柱形结构，圆柱形结构的侧壁开有垂直于侧壁的接口，连接尾吹气路，圆柱形的一端封口并开有接口连接气相色谱柱，圆柱形的另外一端开口，连接气路管，气相色谱柱与气路管同轴且相连通，所述气路管自腔体一端依次填充第一绝热层、参比填料、第二绝热层、催化剂填料和第三绝热层；第一测温元件的测温区埋入参比填料中，第二测温元件的测温区埋入催化剂填料中，第一测温元件和第二测温元件的导线连接信号处理系统；气路管置于加热元件中。The invention provides a gas chromatographic detector: consisting of a heating block, a gas pipe, a reference packing, a first temperature measuring element, a second temperature measuring element, a catalyst packing, a first heat insulating layer, a second heat insulating layer, a cavity, The signal processing system consists of: the cavity is a cylindrical structure, the side wall of the cylindrical structure is provided with an interface perpendicular to the side wall, connected to the make-up gas circuit, one end of the cylinder is sealed and has an interface to connect to the gas chromatography column, the cylindrical The other end of the shape is open and connected to the gas pipeline. The gas chromatography column and the gas pipeline are coaxial and communicated. The gas pipeline is filled with the first heat insulation layer, the reference packing, the second heat insulation layer, the catalyst and packing and the third insulation layer; the temperature measuring area of the first temperature measuring element is embedded in the reference packing, the temperature measuring area of the second temperature measuring element is embedded in the catalyst packing, the temperature measuring area of the first temperature measuring element and the second temperature measuring element The wires are connected to the signal processing system; the air pipe is placed in the heating element.
所述第一测温元件和第二测温元件的导线从气路管远离腔体的一端引出与信号处理系统连接，或者在气路管侧壁开口，上述导线从开口处引出，开口处以密封胶密封。The wires of the first temperature measuring element and the second temperature measuring element are led out from the end of the gas pipe away from the cavity to connect with the signal processing system, or open on the side wall of the gas pipe, and the above wires are led out from the opening, and the opening is sealed Glue to seal.
所述第一测温元件和第二测温元件为热电偶、热阻丝或热敏电阻，优选热电偶。所述加热元件为电阻丝。The first temperature measuring element and the second temperature measuring element are thermocouples, thermal resistance wires or thermistors, preferably thermocouples. The heating element is a resistance wire.
所述参比填料与催化剂填料的热容相近且耐温不低于400℃。The heat capacity of the reference packing is similar to that of the catalyst packing and the temperature resistance is not lower than 400°C.
所述参比填料(6)为硅藻土或金属氧化物中的一种或二种以上，优选为硅藻土，上述金属氧化物为氧化铝、氧化钙或氧化锆的一种或二种或三种。The reference filler (6) is one or more than two kinds of diatomaceous earth or metal oxides, preferably diatomaceous earth, and the above-mentioned metal oxides are one or two kinds of alumina, calcium oxide or zirconia or three.
所述第一绝热层(5)、第二绝热层(7)、第三绝热层(9)为玻璃纤维棉、石英纤维棉、陶瓷筛板、石英纤维筛板中的一种或二种以上，优选为石英纤维棉。The first heat insulation layer (5), the second heat insulation layer (7), and the third heat insulation layer (9) are one or more of glass fiber wool, quartz fiber wool, ceramic sieve plate, and quartz fiber sieve plate , preferably quartz fiber cotton.
所述催化剂填料为担载催化活性成分的固体载体填料，其中催化活性成分为单组分贵金属、多组分贵金属、单组分过渡金属氧化物、多组分过渡金属氧化物、钙钛矿型复合氧化物或尖晶石型复合氧化物中任一种；固体载体为多孔无机材料。例如担载铂-钯双金属的氧化铝颗粒、担载金的二氧化钛颗粒、氧化铬负载分子筛颗粒、铜锰复合氧化物负载二氧化钛颗粒；具有钙钛矿型的LaCoO3或LaFeO3负载SBA-15颗粒；具有尖晶石型的CuFe2O4负载ZrO2载体等。The catalyst filler is a solid carrier filler loaded with catalytically active components, wherein the catalytically active components are single-component noble metals, multi-component noble metals, single-component transition metal oxides, multi-component transition metal oxides, perovskite type Any one of composite oxides or spinel composite oxides; the solid carrier is a porous inorganic material. For example, platinum-palladium bimetallic alumina particles, gold-loaded titanium dioxide particles, chromium oxide-loaded molecular sieve particles, copper-manganese composite oxide-loaded titanium dioxide particles; perovskite-type LaCoO 3 or LaFeO 3 -loaded SBA-15 Particles; CuFe 2 O 4 loaded ZrO 2 carrier with spinel type, etc.
所述催化剂填料和参比填料的填充床层的长度相同。The packed bed lengths of the catalyst packing and the reference packing were the same.
所述气路管为石英管、陶瓷管或内壁惰性的玻璃管，优选石英管。The gas pipe is a quartz tube, a ceramic tube or a glass tube with an inert inner wall, preferably a quartz tube.
有益效果Beneficial effect
本发明与其他检测器相比，仅需空气作为载气和尾吹气，操作相对简单，便于携带。通过更换催化剂的种类可实现通用型检测器和选择性检测器的转变。Compared with other detectors, the present invention only needs air as carrier gas and make-up blowing gas, and is relatively simple to operate and easy to carry. By changing the type of catalyst, the transition between general-purpose detectors and selective detectors can be realized.
本发明采用填塞式结构，使流出物在载气的带动下快速从内部通过催化剂填料，使得被测物与催化剂填料接触充分，反应完全，提高了灵敏度；测温元件置于催化填料内部，能及时反映催化燃烧导致的温度变化，减小了响应时间。The invention adopts a packing structure, so that the effluent quickly passes through the catalyst packing from the inside under the drive of the carrier gas, so that the measured object and the catalyst packing are in full contact, the reaction is complete, and the sensitivity is improved; the temperature measuring element is placed inside the catalytic packing, which can Timely reflect the temperature change caused by catalytic combustion, reducing the response time.
本发明采用加热装置与测温装置分离，使噪声大大降低。The invention adopts the separation of the heating device and the temperature measuring device, so that the noise is greatly reduced.
尾吹气的加入减小了检测器的有效体积，改善了峰形。The addition of makeup gas reduces the effective volume of the detector and improves peak shape.
附图说明Description of drawings
图1(a)为本发明实施例1所述的检测器结构示意图；(b)为本发明实施例2所述的检测器结构示意图Fig. 1 (a) is the schematic diagram of the detector structure described in Embodiment 1 of the present invention; (b) is the schematic diagram of the detector structure described in Embodiment 2 of the present invention
其中，1-腔体；2-气相色谱柱；3-尾吹气路；4-气路管；5-第一绝热层；6-参比填料；7-第二绝热层；8-催化剂填料；9-第三绝热层；10-第一测温元件；11-第二测温元件；12-加热元件；13-密封胶。Among them, 1-cavity; 2-gas chromatography column; 3-makeup gas path; 4-gas pipe; 5-first insulation layer; 6-reference packing; 7-second insulation layer; 8-catalyst packing ; 9-the third heat insulation layer; 10-the first temperature measuring element; 11-the second temperature measuring element; 12-the heating element; 13-the sealant.
具体实施方式detailed description
实施例1Example 1
组装一种气相色谱检测器，如图1(a)所示，由加热块(12)、气路管(4)、参比填料(6)、第一测温元件(10)、第二测温元件(11)、催化剂填料(8)、第一绝热层(5)、第二绝热层(7)、腔体(1)、信号处理系统组成；所述腔体(1)为圆柱形结构，圆柱形结构的侧壁开有垂直于侧壁的接口，连接尾吹气路(3)，圆柱形的一端封口并开有接口连接气相色谱柱(2)，圆柱形的另外一端开口，连接气路管(4)，气相色谱柱(2)与气路管(4)同轴且相连通，所述气路管(4)自腔体(1)一端依次填充第一绝热层(5)、参比填料(6)、第二绝热层(7)、催化剂填料(8)和第三绝热层(9)；第一测温元件(10)的测温区埋入参比填料(6)中，第二测温元件(11)的测温区埋入催化剂填料(8)中，第一测温元件(10)和第二测温元件(11)的导线从气路管远离腔体的一端引出连接信号处理系统；气路管(4)置于加热元件(12)中。Assemble a gas chromatographic detector, as shown in Figure 1(a), consists of a heating block (12), a gas pipe (4), a reference packing (6), a first temperature measuring element (10), a second measuring Composed of temperature element (11), catalyst packing (8), first heat insulation layer (5), second heat insulation layer (7), cavity (1), and signal processing system; the cavity (1) is a cylindrical structure , the side wall of the cylindrical structure has an interface perpendicular to the side wall, connected to the makeup gas path (3), one end of the cylinder is sealed and has an interface to connect to the gas chromatography column (2), the other end of the cylinder is open, connected to The gas pipe (4), the gas chromatographic column (2) and the gas pipe (4) are coaxial and communicated, and the gas pipe (4) is filled with the first heat insulating layer (5) sequentially from one end of the cavity (1) , reference packing (6), second heat insulating layer (7), catalyst packing (8) and third heat insulating layer (9); the temperature measuring area of the first temperature measuring element (10) is embedded in the reference packing (6) Among them, the temperature measuring area of the second temperature measuring element (11) is buried in the catalyst packing (8), and the wires of the first temperature measuring element (10) and the second temperature measuring element (11) are away from the gas pipe One end leads out to be connected to the signal processing system; the air pipe (4) is placed in the heating element (12).
上述加热元件(12)为加热块；第一测温元件和第二测温元件均为K型热电偶；参比填料为硅藻土，颗粒度为60目，填充量30mg；第一绝热层、第二绝热层、第三绝热层均为石英纤维棉；催化填料为氧化铝负载铂催化剂，颗粒度为60目，填充量35mg；气路管为内径1mm石英管。该检测器能用于挥发性有机物、CO、H2的检测。The above-mentioned heating element (12) is a heating block; the first temperature measuring element and the second temperature measuring element are K-type thermocouples; the reference filler is diatomite, the particle size is 60 mesh, and the filling amount is 30 mg; the first heat insulating layer , The second heat insulation layer and the third heat insulation layer are all quartz fiber cotton; the catalytic filler is alumina supported platinum catalyst, the particle size is 60 mesh, and the filling amount is 35mg; the gas pipe is a quartz tube with an inner diameter of 1mm. The detector can be used for the detection of volatile organic compounds, CO, H2 .
实施例2Example 2
如图1(b)所示，在实施例1所述的气相色谱检测器基础上，气路管4在两个填料区分别设有开口，第一测温元件10和第二测温元件11的导线分别从两个开口处引出，并用密封胶13密封固定，密封胶13选用无机胶。As shown in Figure 1 (b), on the basis of the gas chromatographic detector described in embodiment 1, the gas pipe 4 is respectively provided with openings in the two packing areas, the first temperature measuring element 10 and the second temperature measuring element 11 The lead wires are respectively drawn from the two openings, and sealed and fixed with sealant 13, and the sealant 13 is selected from inorganic glue.
实施例3Example 3
在实施例1所述的气相色谱检测器基础上，催化剂填料8改为担载金的二氧化钛颗粒，填充量35mg，其中金的担载量为10％(w/w)，该检测器用于130℃选择性检测甲醇。On the basis of the gas chromatographic detector described in Example 1, the catalyst packing 8 is changed to gold-loaded titanium dioxide particles, with a loading of 35 mg, wherein the gold loading is 10% (w/w), and the detector is used for 130 ℃ selective detection of methanol.
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