Optimization of digestion methods for sewage sludge using the Plackett-Burman saturated design View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1998-05

AUTHORS

I. Lavilla, B. Pérez-Cid, C. Bendicho

ABSTRACT

The Plackett-Burman saturated factorial design was used to select optimized dissolution conditions for sewage sludge samples. Three different digestion methods were applied: i) microwave oven digestion in a domestic oven with Parr-type reactors; ii) microwave oven digestion with controlled-pressure reactors; iii) pressure bomb reactor heated on a hot plate. The three methods were validated by statistically comparing the metal contents found with the certified ones of the sewage sludge sample (BCR 145R). No significant differences were obtained and the RSD values were lower than 3% in all cases. The metals were determined by flame-AAS. The variables studied were the following: microwave power; digestion time; predigestion; volume of hydrochloric acid; volume of hydrofluoric acid; volume of nitric acid. The operative advantages offered by microwave digestion with controlled-pressure reactors were also considered. More... »

PAGES

164-167

Journal

TITLE

Journal of Analytical Chemistry

ISSUE

2

VOLUME

361

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s002160050855

DOI

http://dx.doi.org/10.1007/s002160050855

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1019524004


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