| 摘要 |
<p>Complex units of metal elements on the surface of a natural or synthetic resin support, are cleaned using a liquid mixture of (i) >=1 alcohol whose solubility parameter (delta) is clearly higher than that of the resin and (ii) >=1 H-bonding liquid solvent whose coefft. delta is reasonably lower than that of the resin to be removed, the ratio (i):(ii) being such as to give a coefft. delta close to that of the resin to be eliminated. The solvent does not attack the metal or support nor lower adherence between them. Alcohol (i) may be MeOH, EtOH, methyl glycol or an alcohol hydrate. Solvent (ii) ma be MeEt ketone, Me i-Bu ketone or Et amyl ketone.</p> |
