Analysis device and method for measuring content of hydrogen sulfide and hydrogen phosphide

Abstract

The invention discloses an analysis device and method for determining the content of hydrogen sulfide and hydrogen phosphide. The device comprises a carrier gas device, a fuel gas device, a combustion-supporting gas device, a six-way valve, a flame photometric detector and a display, the carrier gas device is connected to the six-way valve through the first filter; the gas device is connected witha flame photometric detector through a third filter; the combustion-supporting gas device is divided into two paths of air pipelines to be connected to the flame photometric detector after passing through the second filter; the six-way valve is connected to the chromatographic column; wherein the chromatographic column is connected to the flame photometric detector, the flame photometric detectoris a double-photomultiplier detector, a sulfur optical filter and a phosphorus optical filter are respectively arranged at the outlet of the flame photometric detector, and response signals obtainedby detection are respectively connected with the first micro-current amplifier and the second micro-current amplifier and then transmitted to the display for spectrogram. According to the method, hydrogen sulfide and hydrogen phosphide in the mixed gas can be effectively separated, and the content of hydrogen sulfide and hydrogen phosphide is determined.

Description

technical field [0001] The invention relates to an analysis method and device for measuring the content of hydrogen sulfide and phosphine. Background technique [0002] Hydrogen sulfide is a colorless, highly toxic, acidic gas with a special smell of rotten eggs. It is chemically unstable and easy to decompose, flammable, and reducible when heated. It is easy to mix with air or oxygen in an appropriate proportion (4.3%-4.6%). Explosion occurred; gaseous phosphine (PH 3 ) is called phosphine, a colorless gas with the peculiar smell of mustard and garlic. Industrial products have a rotten fish-like smell and are highly toxic. The lower explosive limit of the mixture with air is 1.79% (26g / m 3 ). Industries prone to producing hydrogen sulfide and phosphine gas include sewage treatment, paper making, petrochemical, chemical fertilizer manufacturing, and chemical fiber manufacturing. The high content of hydrogen sulfide and phosphine in the air not only poses a potential explo...

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Problems solved by technology

[0003] According to literature search, there are currently different methods for determining the content of hydrogen sulfide and phosphine in domestic industrial gases or the atmosphere. Quantitative determination of gases

The physical testing method is mainly gas chromatography, which uses a pulsed flame photometric detector, but only a phosphorus filter is used for detection in the detector, which greatly reduces the sensitivity of hydrogen sulfide detection and cannot accurately measure the content of hydrogen sulfide

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