HNO3 and HF in MW will work well for rocks but not for Al oxides especially
in alfa form. Also the presence of HF will precipitate Al as Al fluoride and
then one needs to add Boric acid. The procedure mostly used is with
H2SO4+H3PO4 and the sample needs to be a fine powder.
0.2g sample, 1.5mL of H2SO4 and 3.5mL H3PO4.
But sometimes this might not help and then the fusion with Na2O2 is the
Analytical Sciences Laboratory
GE Global Research Center
K1-2A28, 1 Research Circle,
Niskayuna, NY 12309
(518) 387-4601 / Dial Comm: 833-4601
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From: Gaeho Lee [mailto:[log in to unmask]]
Sent: Friday, April 11, 2003 6:05 AM
To: [log in to unmask]
Subject: Be in saphire
We want to analyze Be in saphire by ICP-MS. Microwave digestion with
combination of either HCl and HF or HNO3 and HF has been tried, but no luck.
I understand that a major element in saphire is an aluminum oxide.
Is there any method to dissolve a saphire sample ? Thank you.
Gae Ho Lee
Department of Chemistry
Dae Jeon, 305-764
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