Study on the Determination of Dissolved Oxygen in Water by Iodometric Method
The determination of dissolved oxygen content in water can effectively judge the degree of water pollution,therefore,dissolved oxygen is an important indicator for evaluating water quality.This article explores and analyzes the influencing factors of iodometric determination of dissolved oxygen,and analyzes the detection limit and actual samples of dissolved oxygen determination.The results showed that the water sample collection process,on-site fixation,fixed reagent amount,inverted shaking process after fixation,and concentrated sulfuric acid addition all affect the determination of dissolved oxygen.The detection limit for dissolved oxygen determination is 0.2 mg/L.The relative standard deviations of actual samples from three different locations were 4.4%,2.6%,and 0.8%,respectively,meeting the quality control requirements.
NETL
NSTL
万方数据
