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Sulfur response signal enhancement assembly of flame photometric detector and application thereof

A technology that responds to signals and flame luminosity. It is applied in the direction of photometry, instruments, and measuring devices using electric radiation detectors. It can solve problems such as the inability to guarantee the luminescence of sulfides, and achieve an increase in the area of ​​the medium temperature zone, a simple mechanical structure, and improved The effect of sensitivity

Active Publication Date: 2020-06-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above results show that the method of introducing a low-temperature flame cover outside the hydrogen-rich flame cannot guarantee a certain enhancement of sulfide luminescence

Method used

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  • Sulfur response signal enhancement assembly of flame photometric detector and application thereof
  • Sulfur response signal enhancement assembly of flame photometric detector and application thereof
  • Sulfur response signal enhancement assembly of flame photometric detector and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Sulfur-responsive signal enhancement components are used, and the cross-sectional schematic diagram is as follows figure 1 As shown, it consists of a quartz rod 1, a T-shaped cylinder 2, a circular porous baffle 3, and a metal ring 4. The T-shaped cylinder 2, the circular porous baffle plate 3 and the metal ring 4 are all stainless steel. The outer diameter of the quartz rod 1 is 4mm, and the length is 24mm, and the two end surfaces of the quartz rod are polished into mirror surfaces. The T-shaped cylinder 2 is cylindrical with a through hole, the inner diameter of the through hole is 4.1 mm, and the peripheral edge of the side wall surface of the upper opening end of the through hole is radially provided with a ring-shaped boss, and the outer diameter of the upper end surface is 5.8 mm. The thickness is 0.5mm, the outer diameter of the lower end surface is 4.8mm, and the length of the T-shaped cylinder 2 is 6mm. A through hole 7 with an inner diameter of 5.0mm is ope...

Embodiment 2

[0035] The sulfur response signal enhancement assembly as described in Example 1, wherein the outer diameter of the quartz rod 1 is 6mm and the length is 19mm, and the length of the quartz rod extended into the flame photometric detector by fixing the stainless steel wire 4 is 16mm. Both the T-shaped cylinder 2 and the circular porous baffle 3 are polyimide. The T-shaped cylinder 2 has a length of 6mm, an inner diameter of 6.1mm, an outer diameter of the upper end surface of the circular platform of 7.8mm, a thickness of 0.5mm, and an outer diameter of the lower end surface of 6.8mm. The outer diameter of the circular porous baffle 3 is 16 mm, the inner diameter of the through hole 7 is 7.0 mm, and the depth is 0.5 mm. The inner diameter of the circular groove 8 is 8.0 mm, and the depth is 0.5 mm. Fifty-two exhaust holes 9 with an inner diameter of 1mm, the exhaust holes 9 are through holes with a spacing of ≥1.5mm. The inner diameter of the metal ring 4 is 6.0mm, and its axi...

Embodiment 3

[0037] The sulfur response signal enhancement assembly as described in Example 1, wherein the outer diameter of the quartz rod 1 is 2 mm and the length is 25 mm, and the length of the quartz rod extended into the flame photometric detector by fixing the stainless steel wire 4 is 20 mm. Both the T-shaped cylinder 2 and the circular porous baffle 3 are ceramics. The T-shaped cylinder 2 has a length of 6mm, an inner diameter of 2.1mm, an outer diameter of the upper end surface of the round platform of 3.8mm, a thickness of 0.5mm, and an outer diameter of the lower end surface of 2.8mm. The outer diameter of the circular porous baffle 3 is 16mm, the inner diameter of the through hole 7 is 3.0mm, and the depth is 0.5mm, and the inner diameter of the circular groove 8 is 4.0mm, and the depth is 0.5mm. Around the circular groove 8, 94 arrays are evenly arranged radially outward The exhaust hole 9 with an inner diameter of 1 mm is a through hole with a spacing ≥ 1.5 mm. The inner dia...

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Abstract

The invention provides a sulfur response signal enhancement assembly of a flame photometric detector. The sulfur response signal enhancement assembly is composed of a quartz rod, a circular porous baffle, a T-shaped cylinder and a metal ring which are coaxially arranged, the metal ring sleeves the quartz rod, and the distance from the lower end of the quartz rod to a nozzle is adjusted by changingthe position of the metal ring on the quartz rod. The circular porous baffle plate of the response signal enhancement assembly is fixed between a flame photometric detector combustion chamber and anexhaust hole cover, and the circular porous baffle does not influence the emission of the gas in the combustion chamber. The response signal enhancement assembly has the following advantages that thetemperature of flame is reduced by the placed quartz rod, the light-emitting area of sulfur in the flame is increased, and then the sensitivity of sulfide detection is improved; the mechanical structure of the assembly is simple, compact and reliable; the distance from the lower end of the quartz rod to the nozzle can be adjusted by changing the position of the metal ring, thereby adjusting the contact area between the quartz rod and the flame.

Description

technical field [0001] The invention relates to the technical field of flame photometric detectors, in particular to a response signal enhancement component of a flame photometric detector. Background technique [0002] Flame Photometric Detector (FPD) is one of the commonly used gas chromatographic detectors, and it is a highly selective and sensitive detector for sulfur or phosphide compounds. The working principle of FPD is chemiluminescent reaction—light signal detection. In the sulfur measurement mode, the sulfur-containing compound decomposes in the hydrogen-rich flame to form excited state molecules (S→S 2 *), the excited state molecule transitions back to the ground state by radiation, emitting light of a specific wavelength (320-420nm). In order to improve the sensitivity of sulfide, Agilent added a heating block to the FPD to realize two temperature gradients on one FPD, and the sulfide chemiluminescence was completed in a low temperature gradient, which increased...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/74G01J1/42
CPCG01N30/74G01J1/42
Inventor 关亚风倪兰秀耿旭辉段春凤
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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