抽气预处理法测定氰化物

Pretreatiment Method by Gas Suction for Determination of Cyanide

作为水质全分析中的一项毒性含量指标,水中氰化物的测定是衡量水体中生物生存、人类饮用用水、工业生产用水安全的重要参数。但其含量监测方法水样预处理步骤繁琐、费时。论文提出用抽气预处理法测定氰化物,并通过对比试验证明,抽气法预处理法操作简便、省时、能耗小;通过在抽气过程中将整个装置处于常温负压条件下,基本解决了HCN外逸、瓶爆裂等问题。论文除了对抽气法预处理一些操作条件进行了摸索并确定了最佳操作条件外还着重探讨了抽气法对复杂水体,如地表水、工厂处理后废水的适用性。

As a criterion of toxicity content in whole analysis of water quality, aqueous cyanide is an important factor to evaluate the applicability to biological living in water, drinking water and water supply for industry. But the pretreatment method for determination of cyanide has complicated steps and needs long time. Pretreatment by gas suction is provided in this paper. Compari- son experiment indicated that this method has such advantages as easy operation, time - saving and low energy consumption. The common problems due to HCH release and bottle - explodition are overcome by putting the whole facilities under the conditions of common temperature and negative pressure. Some operation conditions are discussed and optimal operation condition is found. Besides, the applicability to complex water body like surface water, treated wastewater is also discussed.