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Hydrogen sulfide separation device and detection method for hydrogen sulfide content in extract spice

A technology of hydrogen sulfide and extract, applied in the field of analytical chemistry, to achieve the effect of convenient and simple distillation operation, avoiding loss, and good air tightness

Pending Publication Date: 2017-10-20
CHINA TOBACCO YUNNAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the determination of hydrogen sulfide by ion chromatography has been documented, there is no relevant report on its application to the determination of hydrogen sulfide content in tobacco extract flavors

Method used

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  • Hydrogen sulfide separation device and detection method for hydrogen sulfide content in extract spice
  • Hydrogen sulfide separation device and detection method for hydrogen sulfide content in extract spice
  • Hydrogen sulfide separation device and detection method for hydrogen sulfide content in extract spice

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Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown in the figure, a device for effectively separating hydrogen sulfide from tobacco extracts and spices, all parts are made of quartz glass.

[0034] It specifically includes a distillation flask (1), a receiver (2) and an absorption liquid storage bottle (8). The main part of the receiver (2) is in an inverted U shape, the right side is the distillation sampling channel, and the left side is the condensation A liquid collection channel (10); a closed condensation tube (3) is arranged on the top of the receiver (2), and the receiver (2) and the closed condensation tube (3) are airtightly connected through a grinding port; the distillation sampling channel, the condensate collection The channel (10) and the closed condensation pipe (3) communicate with each other. An acid addition funnel (4) is arranged on the outside of the distillation sampling passage, and the bottom of the acid addition funnel (4) is communicated with the distillation sampling...

Embodiment 2

[0067]The sample for determination is fig extract, and 2.5g is accurately weighed in a 250mL distillation flask, and 50mL of ultrapure water is added. according to figure 1 After setting up the distillation device as shown, add 10mL of 5% sodium hydroxide solution from the exhaust port as the hydrogen sulfide absorption liquid. Then open the valve of the acid-adding funnel, add 10 mL (1+1) of phosphoric acid solution, close the valve, start the electric heating mantle to heat up to 160°C. As the reaction temperature rises, the sample aqueous solution in the distillation flask gradually begins to boil, hydrogen sulfide distills out together with the water vapor, and is absorbed by the sodium hydroxide solution after condensation. When the distilled fraction reaches 25mL, stop the distillation, open the sampling valve, and release the absorption solution; add 5.0-8.0mL of water from the exhaust port to wash the absorption bottle, combine the washing solution and adjust the volu...

Embodiment 3

[0070] The sample for determination is tobacco extract, and 8.0 g is accurately weighed in a 250 mL distillation flask, and 50 mL of ultrapure water is added. according to figure 1 After setting up the distillation device as shown, add 10mL of 5% sodium hydroxide solution from the exhaust port as the hydrogen sulfide absorption liquid. Then open the valve of the acid-adding funnel, add 10 mL (1+1) of phosphoric acid solution, close the valve, start the electric heating mantle to heat up to 160°C. As the reaction temperature rises, the sample aqueous solution in the distillation flask gradually begins to boil, hydrogen sulfide distills out together with the water vapor, and is absorbed by the sodium hydroxide solution after condensation. When the distilled fraction reaches 35mL, stop the distillation, open the sampling valve, and release the absorption solution; add 5.0-8.0mL of water from the exhaust port to wash the absorption bottle, combine the washing solution and accurat...

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Abstract

The invention discloses a hydrogen sulfide separation device and a detection method for hydrogen sulfide content in extract spice. The method includes: distilling a to-be-detected extract sample to separate hydrogen sulfide, adopting a sodium hydroxide solution as the absorption solution, using phosphoric acid to adjust the pH value of the sample water solution, and using ion chromatography to determine the hydrogen sulfide content of the fraction accurately. The distillation apparatus adopted by the invention has the advantages of simple composition, greatly reduced connecting parts, simple operation and better air tightness, and effectively avoids the loss of hydrogen sulfide in a sample pretreatment process. The detection method has the advantages of simple operation, fast detection, high sensitivity, good selectivity and high precision, avoids the defect of false positive possibly produced by the influence of coexisting interference components in spectrophotometry and titration. The detection result of the method can be applied to further accurate determination of tobacco extract deterioration, and providing of corresponding risk early warning, and reduction of the product deterioration risk. Therefore, the detection method has important practical significance for guaranteeing the quality safety of tobacco extract spice and feed liquid.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to a device capable of effectively separating hydrogen sulfide from tobacco extract spices. Simultaneously, the invention also relates to a method for accurately measuring the hydrogen sulfide content in tobacco extract spices. Background technique [0002] Tobacco essence and feed liquid are indispensable and important raw materials in cigarette production. With the development of the tobacco industry, various natural flavors, such as: tobacco extracts, plant extracts, fruit extracts, flower extracts, microbial fermentation Products, seaweed extracts, etc. are widely used in the cigarette industry. The use of natural extracts makes up for the lack of simple ingredients and single fragrance of synthetic flavors, and the aroma components are richer and fuller, which can give cigarette products a special flavor that cannot be compared with synthetic flavors. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/12G01N30/88
CPCG01N30/12G01N30/88G01N30/96G01N2030/122G01N2030/126G01N2030/8859
Inventor 李雪梅刘欣李晶米其利杨叶昆孔维松陈建华王燕梅张承明杨光宇
Owner CHINA TOBACCO YUNNAN IND
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