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Gas chromatograph with plasma emission detector

A gas chromatograph and plasma technology, which is applied in the field of gas chromatographs of plasma emission detectors, can solve problems such as chromatographic column oxygen absorption, achieve convenient operation, low cost, and solve the effect of separating oxygen and argon

Inactive Publication Date: 2013-12-04
SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS
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  • Abstract
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Problems solved by technology

[0003] The purpose of the invention is to solve the defects of the prior art, to design a gas chromatograph with a plasma emission detector, which can detect impurities with a content of ppt, and solve the problem that the temperature of the existing chromatographic column oven is between 50-60 The separation of argon and oxygen at ℃ and the problem of oxygen absorption in the chromatographic column when oxygen is in a trace amount

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Embodiment Construction

[0017] According to attached figure 1 And attached figure 2 , a gas chromatograph with a plasma emission detector in the present invention, including a built-in purifier 1 connected in sequence, an oxygen adsorption prevention device 2, a six-way valve 3, an oxygen-argon separation device 4, a plasma emission detector 6 and Digital voltage output means 7 , plasma emission detector 6 includes selective filter means 5 .

[0018] The measured carrier gas carries the sample gas out of the cylinder, first passes through the built-in purifier 1 and prevents oxygen adsorption device 2, effectively removes the content of impurity gases in the carrier gas, and then passes through the six-way valve 3 for gas sampling, When the six-way valve 3 is switched to the sample injection state, the trace oxygen can quickly pass through the port III of the six-way valve 3 and enter the oxygen-argon separation column of the oxygen-argon separation device 4 . After the sample gas completes the se...

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Abstract

The invention relates to a gas chromatograph with a plasma emission detector. The gas chromatograph is characterized by comprising an internal purifier, an oxygen adsorption preventer, a six-way valve, an oxygen-argon separator, the plasma emission detector, and a digital voltage output device. The plasma emission detector comprises a selective filter. Carrier gas to be detected flows out of a steel cylinder and passes the internal purifier and the oxygen adsorption preventer before entering the six-way valve; when the six-way valve switches to the mode of sample introduction, the carrier gas carries sample gas to enter the oxygen-argon separator; after the sample gas is separated completely, components enter the plasma emission detector successively and are subjected to selective filtering by the selective filter; an optical signal is converted into an electrical signal; finally, the digital electronic signal is output by the digital voltage output device. The gas chromatograph is simple in structure, low in cost and convenient to operate.

Description

technical field [0001] The invention relates to a gas chromatograph, in particular to a gas chromatograph with a plasma emission detector used in the field of high-purity gas and gas detection in the electronic industry. Background technique [0002] Chromatographs currently on the market for high-purity gases and gases in the electronic industry have various defects. Although the traditional hydrogen flame detector has high sensitivity, it can only measure hydrocarbons, and can measure carbon monoxide and carbon dioxide in the case of installing a reformer. However, the sensitivity of the thermal conductivity detector to determine the inorganic components is too low. In recent years, some high-sensitivity instruments have also appeared, such as zirconia detectors and argon ion detectors. Although the sensitivity is high, but because of their selectivity, they can only detect a certain gas or cooperate with other analytical instruments to complete all Determination of impu...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 方华李建浩庄鸿涛
Owner SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS
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