Sulfide detection method and device

A detection method and detection device technology, applied in the field of analytical chemistry, can solve the problems of inconvenient carrying and expensive instruments, and achieve the effects of reducing detection limit, fast response speed and reducing interference

Inactive Publication Date: 2015-11-11
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the instruments used in these methods are all commercial instruments, such as: UV-Vis spectrophotometer, fluorometer, chemiluminescence instrument, chromatograph, etc. These instruments are not convenient to carry and are relatively expensive, so it is necessary to develop new methods for the determination of hydrogen sulfide. method to construct a low-cost, portable hydrogen sulfide detection device

Method used

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  • Sulfide detection method and device
  • Sulfide detection method and device

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Experimental program
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Embodiment 1

[0035] Such as figure 1 with 2 As shown, the detection device of sulfide in the present embodiment is composed of pipeline body 1, carrier gas tube 2, trusteeship 3, sample holding tube 4, photoelectric converter 5, outgoing optical fiber 6, chemical reaction pool 7, filter paper 8, incident optical fiber 9. Light source 10 and dosing control valve 11.

[0036] The pipeline body 1 of this embodiment is a light-proof body made of black polyoxymethylene to ensure that it can be protected from light and has a certain mechanical strength. On the right side of the top of the pipeline body 1, a dosing port and a carrier gas inlet are processed. , the bottom of the right side of the pipeline body 1 is processed with a circular groove with an opening downward as a gas mixing chamber, the gas mixing chamber communicates with the dosing port and the carrier gas inlet, and a dosing control valve 11 is installed on the dosing port for use In order to control the sample injection, the carr...

Embodiment 2

[0053] In the detection device of the present embodiment, the chemical reaction tank 7 of the present embodiment can be a circular tubular structure with openings at both ends, and a detachable filter paper 8 mounting sleeve is installed in the middle, which is set in the inner cavity of the chemical reaction tank 7, so that the light source 10 The distance between the filter paper 8 and the filter paper 8 is 2 cm. An incident light hole is processed on the top of the reaction cell. The optical axis of the incident light passes through the center of the filter paper 8, and the other side of the filter paper 8 discharges gas and receives optical signals.

[0054] Other components are the same as in Embodiment 1.

[0055] Taking human serum as the sample to be tested, the above-mentioned device is used to detect sulfide in human serum. The specific method is composed of the following steps:

[0056] (1) Soak the filter paper 8 in a methyl green solution with a concentration of 2...

Embodiment 3

[0063] In the detection device of the present embodiment, the chemical reaction tank 7 of the present embodiment can be a circular tubular structure with openings at both ends, and a detachable filter paper 8 mounting sleeve is installed in the middle, which is set in the inner cavity of the chemical reaction tank 7, so that the light source 10 The distance between the filter paper 8 and the filter paper 8 is 1 cm. An incident light hole is processed on the top of the reaction cell. The optical axis of the incident light passes through the center of the filter paper 8, and the other side of the filter paper 8 discharges gas and receives optical signals.

[0064] Other components are the same as in Embodiment 1.

[0065] Taking human serum as an example, the above device is used to detect sulfide in human serum. The specific method is composed of the following steps:

[0066] (1) Soak the filter paper 8 in a methyl green solution with a concentration of 100.0 μmol / L and a pH of 7...

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Abstract

The invention relates to a sulfide detection method and device. A sulfide is acidized to be converted into hydrogen sulfide so as to be separated from the complex matrix; the inert gas (nitrogen) serves as a carrier gas to carry generated hydrogen sulfide out and to enable hydrogen sulfide to enter a gas passage; when hydrogen sulfide meets filter paper which is placed in the gas passage and adsorbing a reagent (methyl green) that has selective response to hydrogen sulfide, the released hydrogen sulfide gas is gathered on the filter paper and react with methyl green; after reaction, methyl green on the filter paper turns from dark green to light green or colorless. The intensity of an optical signal is recorded in real time, the sulfide measurement process is simplified, and the interference on measurement from the complex matrix in which the endogenous sulfide is located is reduced. As the hydrogen sulfide gas is gathered on the filter paper, the detection limit is lowered, the detection sensitivity is improved and the relative running cost is low.

Description

technical field [0001] The invention belongs to the field of analytical chemistry and relates to a simple, sensitive and rapid method for measuring hydrogen sulfide and a portable hydrogen sulfide detection instrument with small volume and light weight. Background technique [0002] h 2 S, a colorless, acidic gas with the smell of rotten eggs, is denser than air and soluble in water. At 0°C, 1 mole of water can dissolve about 2.6 moles of hydrogen sulfide. Hydrogen sulfide is an acute and highly toxic gas, and the concentration of hydrogen sulfide in the ambient air is usually 0.1-1 μg / m 3 . When the hydrogen sulfide concentration in the air is 70-150ppm, people will feel obvious eye and upper respiratory tract irritation; when it is 600-700ppm, the patient will feel dyspnea, chest tightness, dizziness, nausea, etc., and chemical pneumonia and emphysema will appear. It will soon fall into a coma from confusion; when it is above 700ppm, the patient will go into a coma with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 杜建修杨雪梅
Owner SHAANXI NORMAL UNIV
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