Factorial design approach to microwave dissolution

A. A. Mohd, John Dean, William Tomlinson

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

A fractional factorial design has been used to explore the variables that affect microwave dissolution using perfluoroalkoxy (PFA)-Teflon digestion vessels. Optimum operating conditions for National Research Council of Canada, certified reference material TORT-1 Lobster Hepatopancreas and National Institute of Standards and Technology, Standard Reference Material (SRM) 1575 Pine Needles, were obtained using this procedure. The optimum conditions found for each variable are: 0.25 g sample mass, 6 ml of concentrated hydrochloric acid, 6 ml of concentrated nitric acid, 3 ml of concentrated hydrofluoric acid and 90% microwave power for a total dissolution time of 15 min. Results for Ca, Fe, Cu and Zn in TORT-1 and Ca and Fe in SRM 1575 were in agreement with the certified values.
Original languageEnglish
Pages (from-to)1743-1748
JournalAnalyst
Volume117
Issue number11
DOIs
Publication statusPublished - Nov 1992

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