| 摘要 |
<p>A funnel comprising a reservoir (1) for a liquid and an outlet tube (2), wherein the outlet tube includes a constriction (9) to limit the flow rate of a liquid through the outlet tube (2). The intended primary use of the funnel is to form a discrete layer of a liquid at the bottom of a mixture of a less dense liquid with a more dense solid material in a receptacle. This requires a substantially non-turbulent flow from the outlet (4) of the outlet tube (2) as is provided by the described funnel. A funnel apparatus (not shown) is also described which comprises at least one reservoir for a liquid and two or more outlet tubes wherein the outlet tubes are constricted to limit the flow rate of liquid passing through the tubes. A separation method employing the funnel and a funnel are also described. </p> |
