Water quality; determination of total arsenic; silver diethyldithiocarbamate spectrophotometric method (ISO 6595:1982); german version EN 26595:1992— 12 стр.
Treatment of water of swimming pools and baths - Part 4: Combination of process: Flocculation, ozonisation, multilayer filtration, chlorination— 10 стр.
Treatment of water of swimming pools and baths - Part 5: Combination of process: Flocculation, filtration, adsorption at granular activated carbon; chlorination— 9 стр.