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A sulfur response signal enhancement component of a flame photometric detector and its application

A technology that responds to signals and flame luminosity. It is used in the use of electrical radiation detectors for photometry, instruments, and measuring devices. It can solve problems such as the inability to guarantee sulfide luminescence, and achieve the effects of simple structure, improved sensitivity, and simple mechanical structure.

Active Publication Date: 2022-03-15
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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  • A sulfur response signal enhancement component of a flame photometric detector and its application
  • A sulfur response signal enhancement component of a flame photometric detector and its application
  • A sulfur response signal enhancement component of a flame photometric detector and its application

Examples

Experimental program
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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 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 4.1mm, and the peripheral edge of the side wall surface of the upper opening end of the through hole is radially provided with an annular boss, and the outer diameter of the upper end surface is 5.8mm. 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 opened in the ...

Embodiment 2

[0035] The sulfur response signal enhancement assembly as described in Example 1, wherein the outer diameter of the quartz rod 1 is 6 mm and the length is 19 mm, and the length of the quartz rod extended into the flame photometric detector by fixing the stainless steel wire 4 is 16 mm. 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 16mm, the inner diameter of the through hole 7 is 7.0mm, and the depth is 0.5mm, and the inner diameter of the circular groove 8 is 8.0mm, and the depth is 0.5mm. 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 6.0 mm, and its ...

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 16 mm, the inner diameter of the through hole 7 is 3.0 mm, and the depth is 0.5 mm, and the inner diameter of the circular groove 8 is 4.0 mm, and the depth is 0.5 mm. 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 inn...

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Abstract

The invention provides a sulfur response signal enhancement component of a flame photometric detector, which is composed of a coaxially placed quartz rod, a circular porous baffle, a T-shaped cylinder and a metal ring. The metal ring is set on the quartz rod, and the distance from the lower end of the quartz rod to the nozzle is adjusted by changing the position of the metal ring on the quartz rod. Secure the circular perforated baffle of the response signal enhancement assembly between the flame photometric detector combustion chamber and the vent cover. The circular perforated baffle does not affect the discharge of gases in the combustion chamber. The response signal enhancement component of the present invention has the following advantages: the placed quartz rod reduces the flame temperature, increases the luminous area of ​​sulfur in the flame, and then improves the sensitivity of detecting sulfide; the mechanical structure of the component is simple, compact and reliable; By changing the position of the metal ring, the distance from the lower end of the quartz rod to the nozzle can be adjusted, 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 Patents(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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