An Apparatus for Oxygenating Test Solutions in which Fish are used as Test Animals for Evaluating Toxicity

Abstract

An apparatus is described which may be used to supply adequate concentrations of dissolved oxygen to fish test jars without “blowing out” volatile toxic components. The apparatus provides for an interface contact between pure oxygen and the sample for gentle agitation to facilitate adequate oxygen absorption and diffusions. Experimental data prove that the use of the apparatus has no apparent detrimental effect on the test animals and prove that the rate of loss of a volatile toxic component such as carbon dioxide is no greater than may be expected from a gentle flowing stream such as the Ohio River.