| 摘要 |
<p>proportion of the pptd. Ag is not >5 wt% (0.5 wt%) of the support. Support is diatomite, active carbon, water-insol. silicates (natural or synthetic), SiO2 hydrated with 30-85 wt% water or dried SiO2 contg. is not >30 wt% water, cellulose, polyamide, crosslinked polyvinyl pyrrolidone, asbestos, glass fibre, ceramic and is in the form of a filter plate, candle, cylinder or sponge. Metallic Cu or Au or insol. Cu or Au cpds. are alternatives to silver.</p> |
