Dual-flame photometric detector

Abstract

The invention provides a dual-flame photometric detector which is characterized by comprising a sample injector (1), one end of the sample injector (1) is provided with a shading piece (2), the other end of the sample injector (1) is fixed to a combustion pool (3), the combustion pool (3) is installed into a pool cover (4), one end of an air duct (5) is fixedly installed on the sample injector (1) and located outside the pool cover (4), the other end of the air duct (5) is provided with a combustion gas joint set (6), a negative pressure pump (7) is communicated with the pool cover (4) through a connection pipe (8), an igniter (8a) is installed on the pool cover (4) and can conduct ignition on the combustion pool (3) in the cover, a spray nozzle (9) is installed at the end, located in the pool cover (4), of the combustion pool (3), one end of a lens fixing base is installed in the pool cover (4), the other end of the lens fixing base is installed in a receiver (11), the end, installed on the pool cover (4), of the lens fixing base (10) is fixedly provided with a large lens, and the end, installed on the receiver (11), of the lens fixing base (10) is fixedly provided with a small lens. By means of the dual-flame photometric detector, full-spectrum detection is achieved, the transmission process loss of light is reduced, and the sensitivity, stability and reliability of the detector are improved.

Description

technical field [0001] The invention belongs to the technical field of analytical instruments, and specifically relates to a double-flame photometric detector, which reduces the loss in the light transmission process and improves the sensitivity, stability and reliability of the detector. Background technique [0002] Flame photometric detector is a kind of detector with high selectivity and high sensitivity for phosphorus and sulfur-containing compounds used in gas chromatograph. When the sample is burned in a hydrogen-rich flame, the phosphorus-containing organic compound mainly emits light with a wavelength of 526nm in the form of HPO fragments, and the sulfur-containing compound emits characteristic light with a wavelength of 394nm in the form of S2 molecules. The photomultiplier tube converts the optical signal into an electrical signal, which is amplified and recorded by a micro-current. The sensitivity of this type of detector can reach tens to hundreds of coulombs / g...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-flame photometric detector for the complex structure of the existing dual-flame photometric detector, which cannot realize full-spectrum detection. , the original flame photometric detector needs three gas supplies, now it only needs to provide one gas source, especially through the innovative design of the nozzle, adding a thin layer of specific metal, the detection of the element Cl is realized, and the full spectrum detection can be realized at the same time , which reduces the loss of light transmission process and improves the sensitivity, stability and reliability of the detector

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