Method for rapid determination of content of selenium in soil sample

Abstract

The invention discloses a method for rapid determination of the content of selenium in a soil sample. According to the invention, hydride generation-atomic fluorescence spectroscopy and a standard curve method are utilized; mixed acid is used, the mixed acid has powerful oxidation capability and does not need cold digestion or stay overnight, and hot digestion time can be shortened at a certain temperature, thereby substantially shortening a detection period. A standard curve can be directly prepared by using a national selenium standard solution, operation is simple, accuracy is high, and a good linear relation is obtained. Since atomic fluorescence spectroscopy has the characteristic of strong anti-interference capability, potassium ferricyanide has a weak effect on shielding interference of other elements and almost exerts no influence on detection results, so it is of no need to use the reagent of potassium ferricyanide, thereby reducing usage amount of reagents and enabling steps of the method to be simpler and operation to be easier.

Description

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AI Technical Summary

Benefits of technology

Inventions have several benefits that make them better than previous methods for measuring selenium levels accurately. They use hydrogen gas generators or atoms emitting light to measure their concentration without requiring complicated procedures like coolings before analysis. These techniques are highly accurate but they take too long because thermal processes must be done under specific conditions such as low temperatures during measurement. However, these new technologies allow us to reduce reaction times while still maintain precise measurements compared to existing methods.

Problems solved by technology

This patent describes various technical problem addressed by this patented technology that includes finding ways to accurately determine both selenium levels and mineral concentrations within soil without requiring complex operations and expensive equipment. Current techniques involve analyzers like ionization chloride gas time-consuming assay, X ray photoelectric emission spectrometer, nuclear magnetic resonance spectrum analyzer, and hydrogen sulfate generator-atomfluorin reaction. However these existing technologies suffer drawbacks including complexity, lengthy processing cycles, poor sensitivity, difficulty in identifying specific element types, and lack of ability to distinguish between different forms of selenium.

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