Device for detecting sulfides in soil samples

Abstract

The invention provides a sulfide detection device in a mud sample, which includes an air blowing device, a detection frame, an acidification device and an absorption device. Air pipe, the absorption device includes a first overflow pipe, the first overflow pipe is connected to the hydrogen sulfide outlet pipe through the second connecting hose, the first overflow pipe is connected to the first absorption bottle, the first absorption bottle is connected to the second overflow pipe, and the second overflow pipe The third overflow pipe is connected to the third overflow pipe through the third connecting hose, and the third overflow pipe is connected to the second absorption bottle. The present invention is compact in structure and easy to use. The flow rate of nitrogen blowing can be accurately controlled through the needle valve flowmeter, and can be accurately controlled through the temperature sensor. The temperature of the water bath, and through two sets of absorption bottles, can effectively improve the hydrogen sulfide recovery rate and improve the accuracy of the test results.

Description

technical field [0001] The invention relates to the technical field of sulfide detection devices, in particular to a sulfide detection device in mud samples. Background technique [0002] Inorganic sulfides are produced during anaerobic decomposition of sulfur-containing organic matter in soil. Under the condition of reducing state, sulfate can also be acted by microorganisms to generate sulfide. When sulfide encounters acid, it will produce hydrogen sulfide, which is easy to dissipate into the air, causing odor and high toxicity. It can interact with cytochromes, oxidases and disulfide bonds in such substances in the human body, affect the oxidation process of cells, cause hypoxia in cells and tissues, and endanger human life. Therefore, sulfide is an important indicator for soil monitoring. [0003] The current methods for the determination of sulfide in soil and sediment in my country include iodometric method, ion selective electrode method, methylene blue spectrophot...

AI Technical Summary

Problems solved by technology

[0008] 4. There is only one acidification reaction bottle and one absorption bottle in the device of this utility model, resulting in low work efficiency of sulfide sample pretreatment

[0010] 1. Although this utility model solves the problem that the existing detection device needs to be manually connected and dismantled, the invention only uses a hollow main shaft as a supporting structure, resulting in insufficient stability of the main structure;

[0011] 2. The nitrogen intake pipeline of this utility model has no control structure, resulting in the uncertainty of the nitrogen intake volume, so that the hydrogen sulfide gas overflow effect cannot be accurately determined, which affects the detection results;

[0013] 4. There is no temperature detection device in the reaction bottle of this utility model. Although a constant temperature water bath is used for heating, the specific real-time temperature of the solution in the reaction bottle cannot be determined, which may easily cause the temperature of the reaction solution to be too low, thereby affecting the reaction process and product composition.

Images