Made of shaping Polytetrafluorethylene Resin by moulding in ordinary temperature then through high heat sintering.

将聚四氟乙烯常温下用模压法成型后再经高温结制成。

Sample was digested in polytetrafluorethylene sealed vesssle by nitric acid-perhydrol or high chloric acid-perhydrol, Hg As Pb were simultaneously determinated by ICP-AES.

采用高压溶样弹，将样品用-氧化氢或高氯-氧化氢溶解后，用ICP-AES法对汞砷铅连续测定。