Sulfur and phosphorus detection device and method based on single channel

Abstract

The invention provides a sulfur and phosphorus detection device and method based on a single channel. The sulfur and phosphorus detection device based on the single channel comprises a combustion chamber and a photomultiplier tube, the separation unit is used for separating out characteristic wavelengths, corresponding to sulfur and phosphorus, in flame light in the combustion chamber in the space; the separated first light beam corresponding to the characteristic wavelength of sulfur is transmitted in a first light path, and the separated second light beam corresponding to the characteristic wavelength of phosphorus is transmitted in a second light path; only one photomultiplier receives emergent light of the first light path and the second light path. The device has the advantages of simple structure, low cost and the like.

Description

technical field [0001] The invention relates to compound detection, in particular to a single-channel-based sulfur and phosphorus detection device and method. Background technique [0002] The flame photometric detector (flame photometric detector, FPD) is a gas chromatograph with high selectivity and high sensitivity for phosphorus-containing and sulfur-containing compounds. 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, and the detection limit of the flame photometric detector can reach 10 -12 g / s (to P) or 10 -11 g / s (to...

AI Technical Summary

Problems solved by technology

[0003] The current single-channel FPD needs to use corresponding filters when detecting S and P substances. To test different samples, the detector needs to be disassembled and replaced to replace the filters. The operation is cumbersome, and it takes about half an hour after the detector is turned off and re-ignited. Stable, waste of experiment time

[0004] If you want to detect S and P at the same time, you need to use a dual-channel detector, which requires two photomultiplier tubes and two filters, which is expensive, and the left and right photomultiplier tubes take up a lot of space

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