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A hydrogen flame and ionization technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of not being suitable for large-diameter capillary tubes and packed columns, and achieve the effect of simple structure, easy assembly, and reasonable positional relationship
Active Publication Date: 2010-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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However, the reported micro-FIDs are only suitable for small-bore ca
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Embodiment 1
[0031] see figure 1 with figure 2 , a small ionization detector that can be used in portable gas chromatography, the components are shown in the figure.
[0032] A small-sized hydrogen flame ionization detector, including a four-way and a nozzle assembly, the two ports on the horizontal side of the four-way 101, the left and right ports are respectively the air inlet 105 and the outlet of the micro-current signal line 104, and the micro-current signal line 104 is drawn from a pressure The cap 106 is passed in series, the pressure cap 106 is blocked at the exit of the signal line, and the ferrule A107 is screwed together with the exit end of the micro-current signal line 104 of the cross 101;
[0033] A metal collector 103 is fixed in the longitudinal through hole of the four-way 101 through the high-temperature-resistant insulating sleeve A102, and the high-temperature-resistant insulating sleeve A102 is arranged inside the upper port of the four-way 101 in the longitudinal ...
Embodiment 2
[0050] 1. Polarized pole and nozzle:
[0051] 1.1 The introduction tube 402 is a nickel tube with a length of 30 mm, an inner diameter of 800 μm, and an outer diameter of 1.6 mm;
[0052] 1.2 Nozzle 401 is a stainless steel capillary tube with a length of 7 mm, an inner diameter of 250 μm, and an outer diameter of 790 μm, which is inserted into a nickel guide tube at a depth of 4022 mm and welded;
[0053] 2. The collector 103 is a stainless steel tube with a length of 24 mm, an inner diameter of 3 mm, and an outer diameter of 4 mm;
[0054] 3. The inner diameter of the upper and lower holes of the stainless steel cross 101 is 6.0mm, and the left and right ports are respectively used for the air pipeline and the lead wire of the collector;
[0055] 4. The inner diameter of the stainless steel two-way 301 is 4mm;
[0056] 5. M6×1 brass nut 401 and pressure cap 106, used for fixing and sealing the access parts of the pool body;
[0057] 6. The high temperature resistant insul...
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Abstract
The invention relates to a small-size hydrogen flame ionization detector. The detector is characterized in that a left port and a right port of a four-way component are respectively an air inlet and a leading-out micro current signal wire outlet, a leading-out micro current signal wire passes through a pressure cap which blocks the signal wire outlet; a metal collector is fixed in a four-way longitudinal through hole by a heat-resisting insulating sleeve A which is arranged at the inner side of an upper port in the longitudinal direction of the four-way component, and is closely laminated with the upper port of the four-way component; the upper end of the metal collector is closely laminated with the inner side wall of the heat-resisting insulating sleeve A, and the lower end thereof is suspended at the inner side of a lower port in the longitudinal direction of the four-way component; the lower end of the four-way component is fixedly connected with a two-way component; and a nozzle is fixedly connected at one end of a leading pipe which is externally sheathed with a heat-resisting insulating sleeve B, and is sheathed on the inner wall of the two-way component by the heat-resisting insulating sleeve B so as to lead the nozzle to extend into the two-way component. The small-size hydrogen flame ionization detector has simple integral structure, convenient assembly and disassembly, little gas consumption amount, low energy consumption, and equal sensitivity with an FID detector with the conventional size.
Description
technical field [0001] The invention is a hydrogen flame ionization detector, in particular a small hydrogen flame ionization detector, which is suitable for a portable gas chromatograph and a total hydrocarbon analyzer. technical background [0002] The hydrogen flame ionization detector was proposed by scholars in Australia and South Africa in 1958. Its working principle is that organic matter undergoes chemical ionization in a hydrogen flame and dissociates into carbocations. Under the action of an electric field, carbocations are collected. The poles move directional, and the resulting micro-current passes through the electrostatic amplifier to obtain measurable signals, which reflect the corresponding information of the chromatographic effluent components. The hydrogen flame ionization detector is responsive to most organic compounds and has high sensitivity. It is the most commonly used general-purpose detector in gas chromatography. [0003] Portable small or micro g...
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IPC IPC(8): G01N30/68
CPCG01N30/68G01N27/626
Inventor 关亚风王建伟朱道乾倪丽娟熊艳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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