A Syringe Pipette Method for the Determination of Oxygen in the Field

Abstract

The method usually employed for the determination of oxygen in natural waters is that described in Standard Methods of Water Analysis (1925). The basis of this method is the Winkler chemical method for the estimation of dissolved oxygen. A sample of the water to be examined is collected in a bottle of about 250 c.c. capacity. The usual Winkler reagents are added and the iodine liberated is titrated against a standard sodium thiosulphate solution. The amount of oxygen originally present in the sample can then be deduced.1