【摘要】 <正> 溶解氧是水区水污染与自净的重要指标关于溶解氧的測定方法,到目前为止,較普遍的,还是采用Winkler氏法,应用此法测定时,操作步驟較多而且終点不易掌握;自从捷克学者Heyrovcky氏提出极譜分析以后,在卫生学的領域里,这一方法也逐漸得到了广泛的应用。同样,利用极譜分析方法来测定溶解氧,也曾做过一些工作。但是这些討論,或則是涉及到某些理論上的問題,或者是只談到生活污水工业污水中溶解氧的测定或自动記录。而天然水区水中溶解氧的测定,目前还是沿用着Winkler氏的方法。更多还原

【Abstract】 In our experiments, polagraphic method has been used for the quanitative determination of dissolved oxygen in the water reserviors. The results thus obtained quite agree with the Winkler’s method. A simple instrument was designed, in which a 40,000 ohms resistance is connected to the terminals of the electrolytic cell in series. Instead of observing the diffusion curreut in the usual manner, potential difference across the constant resistance is measured.In addition, after a series of experiments, an interested result has been obtained, with or without bubbling the purified hydrogen through the cell to remove oxygen, the final calculated results almost remain unchanged.更多还原