Fast sulfide ion test method

Abstract

The invention provides a fast sulfide ion test method. The method uses a property of ANS that the fluorescence of 4-Amino-1-Naphthalene sulfonate (ANS) can be effectively quenched by MnO2 nano-material to prepare the ANS/MnO2 composite system. When tiny portion of S<2-> is added in the system, because the oxidation-reduction reaction occurs between the S<2-> and MnO2 to generate divalent manganese ions in the solution, thus enhancing the fluorescence intensity of the ANS, and the increase of the fluorescence intensity is in a linear relationship with the S<2-> ions concentration, thus achieving the test of S<2-> ion. Compared with prior art the method has the advantages of being simple in operation and being able to test the S<2-> ion in a fast and real time mode.

Description

technical field [0001] The invention belongs to the field of chemical detection, in particular to a method for rapidly detecting sulfur ions. Background technique [0002] With the development of social economy and the intensification of human production activities, environmental pollution has seriously threatened the environment and health of human beings, especially the discharge of sulfur-containing pollutants, which not only pollutes water and soil resources, but the sulfur ions in sewage It is also easy to turn into hydrogen sulfide gas in the environment, thus causing air pollution. [0003] There are three main sources of sulfur-containing pollutants: first, the sulfur-containing wastewater discharged during industrial production, which is directly discharged into rivers and lakes without treatment, causing serious water pollution. One of the most important indicators of surface water testing projects, excessive sulfur content will directly threaten human health and ...

AI Technical Summary

Problems solved by technology

In the prior art, the detection method of sulfide ion (or hydrogen sulfide) has high cost, low sensitivity and low detection limit

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