水体中DO(溶氧的简称,下同)是一个很重要养鱼指标。在无测氧仪的条件下,常规测氧法太繁复,不易推广。今介绍一种简单而又实用的方法: 用虹吸法吸取水样250毫升,注入250毫升容量瓶中,立即明MnSO_4和碱性KI各0.5毫升固定水中溶氧,使其成絮状沉淀到中部,然后用浓硫酸(P=1.84)0.5毫升将沉淀物 DO (dissolved oxygen short name, the same below) is a very important indicator of fish culture. In the absence of oxygen meter conditions, the conventional oxygen method is too complicated, not easy to promote. Now introduce a simple and practical method: Siphon method to absorb water samples 250 ml, into a 250 ml volumetric flask, and immediately clear MnSO_4 and basic KI 0.5 ml of fixed water dissolved oxygen, making it flocculent precipitate to the middle , Followed by 0.5 ml of concentrated sulfuric acid (P = 1.84) to precipitate