English to Polish Other Environment & Ecology general

Tekst o badaniach mikrobiologicznych wody.

Remove a small quantity of the cooled tap water and determine the concentration of free and total chlorine in a suitable aliquot. This determination is used to calculate the amount of chlorine that should be added to the remaining volume of tap water, to produce a free chlorine concentration of approximately 0.1 - 0.5 mg/l. The calculated amount of chlorine can be added using a solution prepared from sodium hypochlorite or chlorine-generating tablets. The chlorinated tap water should be stoppered or capped and thoroughly mixed. Store the chlorinated tap water at 5 ± 3°C.