Open acid dissolution-Ammonia solution extraction-ICP OES rapid determination of 7 trace metal elements in soil.

ABSTRACT: To overcome the corrosion of hydrofluoric acid on the ICP OES injection system in the acid dissolution system, this paper makes some improvements based on the traditional open digestion. The improved method does not require the complete removal of hydrofluoric acid. After appropriate digestion of the sample with a mixed acid, the solution can be transferred to a colorimetric tube containing ammonium hydroxide solution to give the final volume for analysis. In this paper, two-point standard curves are plotted using soil standards and process blanks, which is not only convenient but also overcomes the interference of the matrix effect. Through continuous experiments, the preferred ratio of mixed acid is 3 mL nitric acid + 5 mL hydrofluoric acid, and the concentration of ammonia solution is 0

SUBMITTER: Wang J 

PROVIDER: S-EPMC10564144 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature