Faektilar These EPA methods do not depend on the used instrument, as they prescribe temperature profiles instead of instrument-specific power programs. While A and A are acid leaching methods, is flexibly adaptable for total digestion. Microwave Assisted Acid Digestion of Sediments, Sludges, Soils, and Oils This document explains the procedure designed to mimic extraction using conventional heating with nitric acid HNO3or alternatively, nitric acid and hydrochloric acid HCl. Generally the aim of such methods is to improve analytical performance and reliability. The accuracy of these methods depends on precise replication of the reaction a.
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Get e-Alerts Abstract An updated, optimized method has been developed to minimize the chemical biases and inefficiencies between two EPA SW alternative leach methods, microwave-assisted Method and open vessel Method B, for the determination of metals in solid samples. The microwave method is more easily transferred and provides more reproducible leach results, mainly from more precise control of the temperature during the extraction process.
Previously, reagent limitations originally placed on Method did not allow these alternative methods to yield similar results for some analytes. This work describes the development and validation of EPA Method A, which includes an option to add HCl to improve the chemistry of the microwave method, making it comparable to open vessel Method B. Including HCl provides complexation and stabilization of some analytes by Cl- species, leading to improved recoveries. Recovery of other metals, such as Cu and Ni, are unaffected.
Method validation was provided by leaching and analysis of SRMs. Cited By This article is cited by 78 publications. DOI: Dirk D. Link and, H. Analytical Chemistry , 72 13 , Link,, Peter J. Walter, and, H. Insight into dewatering behavior and heavy metals transformation during waste activated sludge treatment by thermally-activated sodium persulfate oxidation combined with a skeleton builder—wheat straw biochar.
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Impact of gold-mining activity on trace elements enrichment in the West African estuaries: The case of Pra and Ankobra rivers with the Volta estuary Ghana as the reference. Journal of Geochemical Exploration , , Soil Systems , 2 2 , Elsa C. Martins, Maria J. The Open Agriculture Journal , 12 1 , Santosh Kumar Sarkar. Systematic investigation on combustion characteristics and emission-reduction mechanism of potentially toxic elements in biomass- and biochar-coal co-combustion systems.
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Yong Wang, Laura A. Baker, Ian D. Determination of gold and silver in geological samples by focused infrared digestion: A re-investigation of aqua regia digestion. Talanta ,
SW-846 Test Method 3051A: Microwave Assisted Acid Digestion of Sediments, Sludges, Soils, and Oils
EPA Method 3051
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EPA Method 3050B: Acid Digestion of Sediments, Sludges, and Soils