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Method for simultaneously determining contents of chromium (VI) and manganese (VII) in solution

A solution and content technology, applied in the field of analysis and testing, can solve problems such as large deviation of results, and achieve the effects of small deviation, reduced pollution, and simple operation.

Active Publication Date: 2019-02-22
FUYANG NORMAL UNIVERSITY
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  • Application Information

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Problems solved by technology

[0003] Since the absorption spectra of chromium (VI) and high-valent manganese (VII) have a certain overlap, in order to measure the two substances at the same time, it is necessary to analyze the properties of the two substances so as to select an appropriate experimental method for the determination of chromium and manganese. There are many methods, such as spectrophotometry, atomic absorption spectrometry, potentiometric method, fluorescence method, etc., but most of them are aimed at a single component. For the detection of multiple components, the results have a large deviation

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  • Method for simultaneously determining contents of chromium (VI) and manganese (VII) in solution
  • Method for simultaneously determining contents of chromium (VI) and manganese (VII) in solution
  • Method for simultaneously determining contents of chromium (VI) and manganese (VII) in solution

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Embodiment

[0042] Simultaneous determination of chromium(VI) and manganese(VII) in solution

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Abstract

The invention discloses a method for simultaneously determining the contents of chromium (VI) and manganese (VII) in a solution. Wavelength scanning is carried out by using an ultraviolet-visible spectrophotometer so as to improve the determination condition of a two-component mixture, and thus, the optimum condition for the determination of trace chromium (VI) and manganese (VII) in a mixed sample solution by ultraviolet-visible spectrophotometry is obtained. Improved experiments and secondary improvement experiments determine that when the chromium (VI) and manganese (VII) in the solution are simultaneously determined by using the ultraviolet-visible spectrophotometry, the optimum determination condition is at 370nm (low concentration) / 440 nm (high concentration) and 545nm; and the concentration determined under the condition has certain rationality and small deviation. The method is simple to operate, has strong specificity, meets the technical requirements on the determination result and water quality analysis, is suitable for the simultaneous determination of the chromium (VI) and manganese (VII) in natural water and industrial wastewater and has certain practical significance for controlling the contents of chromium (VI) and manganese (VII) in water samples and reducing pollution.

Description

technical field [0001] The invention belongs to the technical field of analytical testing methods, in particular to a method for simultaneously measuring the contents of chromium (VI) and manganese (VII) in a solution. Background technique [0002] Chromium is one of the essential trace elements to maintain human and animal life activities. It exists in water in the form of hexavalent and trivalent. Hexavalent chromium has strong oxidizing properties and is carcinogenic. Its toxicity is 100 times greater than that of trivalent chromium. times, and chromium (VI) is not easy to degrade, easy to accumulate in organisms and human body, causing long-term harm, the state stipulates that the maximum allowable mass concentration of chromium (VI) in discharged wastewater is 0.5mg L -1 , the content of chromium (VI) in domestic water shall not exceed 0.05~1.5mg·L -1 Therefore, it is necessary to measure and strictly control the chromium content in the water body; too much high-valent...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/314G01N2021/3155
Inventor 宋崇富田志美纪小璇
Owner FUYANG NORMAL UNIVERSITY