Device and method for online detection of sulfide concentration in water by methylene blue spectrophotometry
A spectrophotometry and methylene blue technology, which is applied in the field of devices for detecting sulfide concentration in water by methylene blue spectrophotometry, can solve the problem that sulfide cannot be monitored in situ on site, and achieve stable and reliable measurement results, saving manpower and material resources, and reproducing good effect
Inactive Publication Date: 2015-08-12
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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[0005] The purpose of the present invention is to solve the problem that sulfide in water samples cannot be monitored in situ at present, and provides a device and method for online detection of sulfide concentration in water by methylene blue spectrophotometry
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Embodiment 1
[0037] The structure of the sulfide automatic analysis device in the water body of the present invention is as follows: figure 1 shown. The device for online detection of sulfide concentration in water samples of the present invention includes sample acidification components, air stripping components, solution absorption components, gas supply components, color development and optical detection components.
[0038]Peristaltic pumps PP1 and PP2 of the present invention are commercially available 6-rotor pulse pumps with a pump flow rate of 1 to 100ml / min; miniature vacuum pumps MP1 and MP2 are commercially available pumps with a pump flow rate of 10 to 1000ml / min; three-way valves V1, V2, V3, V4, V5, and V6 are commercially available two-position three-way solenoid valves, and the inner core is made of acid and alkali resistant materials such as PEEK. The three-way solenoid valve has one outlet and two inlets. The inlet is divided into a normally open port and a normally close...
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The invention discloses a device and a method for online detection of concentration of sulfides in a water sample by a methylene blue spectrophotometry. The device comprises a sample acidification component, a gas extraction component, a solution absorption component, a gas supply component, a color development and optical detection component and a series of components. The invention further provides the method for performing online detection on the sulfides by utilizing the device. The device and the method have the advantages of stable and reliable determination result, fast and accurate detection process, good reproducibility, stable and reliable result, automated operation of detection process, long-term continuous real-time online monitoring and capability of saving manpower and material resources.
Description
technical field [0001] The invention relates to a method for detecting sulfide in water samples, in particular to a device and method for detecting the concentration of sulfide in water by methylene blue spectrophotometry. Background technique [0002] Sulfide is one of the important substances that widely exist in water quality. There are two main sources of sulfide in water quality: one is that the minerals in the water contain sulfide, and the other is that the wastewater discharged from leather, paper, chemical, printing and dyeing industries contains Lots of sulfides. Sulfide is an important detection indicator of water pollution, especially an important indicator of the quality of the marine bottom environment. The determination of sulfide in water quality is one of the important indicators of environmental monitoring. Commonly used detection methods are photometry, chromatography, iodometric method, electrochemical method and so on. The most commonly used of these ...
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IPC IPC(8): G01N21/31
Inventor 王洪亮张述伟郭翠莲马然褚东志王昭玉程岩侯广利刘岩王茜石小梅刘东彦任国兴吕婧曹璐
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI