Arystarhova E. O.
Pages: 50–54.

Full article: 

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Abstract

The purpose. Increase of selfdescriptiveness of biotesting waters of surface sources of water service and drinking water on shellfishes Daphnia magna S. due to use of the test-attribute of frequency of cordial beatings (FCB). Methods. Biotesting by determination of immobilization of D. magna during 48-hour exposure and FCB – in conditions of 3-hour exposure. Results. Toxicity of water is not fixed at absence of immobilization of D. magna. By index of FCB their low level of toxicity (26,2 — 35,4%) is determined. Conclusions. Express-assessment of toxicity of waters of surface sources of water service and drinking water is expedient to conduct on D. magna using test-attribute FCB after 3-hour exposure. The high performance of the offered method is proved in conditions CF «Zhytomyrvodokanal». Use of test-attribute FCB in comparison to standard index (immobilization of D. magna) promoted increase of responsivity of biotesting for 28,33% and decrease of its duration for 73,11%.

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Key words: water biotesting, Daphnia magna S., immobilization, FCB, toxicity level.

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