Device for detecting sulfides in soil samples

Abstract

The invention provides a device for detecting sulfides in soil samples. The device comprises a gas blowing apparatus, a detection frame, an acidification apparatus and an absorption apparatus, wherein the acidification apparatus comprises a three-necked flask; a temperature sensor and a hydrogen sulfide gas outlet pipe are arranged in an inlet of the right side of the three-necked flask; the absorption apparatus comprises a first overflowing pipe; the first overflowing pipe is connected with the hydrogen sulfide gas outlet pipe through a second connection hose; the first overflowing pipe is connected with a first absorption flask; the first absorption flask is connected with a second overflowing pipe; the second overflowing pipe is connected with a third overflowing pipe through a third connection hose; the third overflowing pipe is connected with a second absorption flask. The device for detecting the sulfides in the soil samples is compact in structure and convenient to use; the nitrogen gas blowing flow can be accurately controlled by a needle valve flow meter; the temperature of water bath can be accurately controlled by the temperature sensor; through two groups of absorption flasks, the recovery rate of hydrogen sulfide can be effectively increased; the accuracy of detection results can be improved.

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