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漏斗是化学分析工作中广泛采用的基本玻璃仪器之一,对过滤效率起着决定性的作用。漏斗的质量主要看它的形状是否合乎科学.长期实践得出的结论主要有以下五点:1.锥部内壁的夹角应为60°;2.柄部内径应为3毫米;如果大于此值就难以保持水柱;3.柄部下端应为斜口;4.柄部不宜太短.因为柄部所保持的水柱愈高,过滤也愈快;
Funnel is one of the basic glass instruments widely used in chemical analysis work, plays a decisive role in the filtration efficiency. Funnel quality depends mainly on its shape is scientific. Long-term practice concluded that the following five points: 1. The cone angle between the inner wall should be 60 °; 2. Shank diameter should be 3 mm; if larger than this The value of it is difficult to maintain the water column; 3 handle the lower end of the ramp should be; 4 shank should not be too short .Because the water held by the handle is higher, the filter is also faster;