Effect of Algicidal Quaternaries on the Germicidal Activity of Chlorine on Swimming Pool Water
AUTOR(ES)
Koski, T. A.
RESUMO
The Swimming Pool Water Disinfectant Test Method of the Association of Official Analytical Chemists was used to determine the effect of the accepted level of 2 ppm of some commercial quaternary ammonium algicides on the germicidal activity of chlorine. Accurate determinations on the amounts of residual available chlorine in chlorine-quaternary mixtures could not be made by the usual chemical methods. This made it necessary to base all comparisons on the starting concentrations of available chlorine rather than the final concentration as specified in the method employed. No evidence was obtained to support the use of lower concentrations of residual available chlorine for disinfection in the presence of algicidal quaternaries than those commonly recognized as effective by the American Public Health Association. The rate of kill against the gram-positive test organism Streptococcus faecalis was faster in quaternary-chlorine mixtures than in the sodium hypochlorite control solutions. The practical significance of this result in the bench method identified cannot be ascertained in the absence of more sensitive and precise chemical procedures for determining concentrations of residual available chlorine in the presence of quaternaries or in actual swimming pool tests.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=547185Documentos Relacionados
- Comparison of Chlorine, Bromine, and Iodine as Disinfectants for Swimming Pool Water
- Algicidal Effect of Bromine and Chlorine on Chlorella pyrenoidosa
- Loss of Algicidal Chemicals in Swimming Pools
- THE HYGIENE OF THE SWIMMING POOL
- Effect of ionic environment on the inactivation of poliovirus in water by chlorine.