Very often, Silicon containing samples are digested in a micro-wave oven with acid mixtures containing HF.
In order to allow injection in a ICP with quartz nebulizer and torch, remaining HF may be eliminated by addition of Boric acid.
In most papers, a second micro-wave cycle at about 200°C is required to complete this HF "neutralization".
Is high temperature necessary for this neutralization ?
Some propose a simple mixing with an excess of a saturated Boric acid solution...
Is there a way to evaluate the remaining HF after H3BO3 treatment ?
Philippe De Raeve
Quality Assistance SA
Technoparc de thudinie, 1
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