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#5650
Má bhíonn aon silice fágtha san iarmhar, déan é a atuaslagadh i gcúpla millilíotar d'aigéad hidreafluarach (3.4) agus galaigh go mbeidh sé tirim.
If any silica remains in the residue, redissolve it in a few millilitres of hydrofluoric acid (3.4) and evaporate to dryness.