Поиск

Air quality -- Determination of mass concentration of sulphur dioxide in ambient air -- Thorin spectrophotome…

Overview ISO 4221:1980 - "Air quality - Determination of mass concentration of sulphur dioxide in ambient air - Thorin spectrophotometric method" - specifies a wet-chemical spectrophotometric procedu…

Photographic grade p-methylaminophenol sulphate — Specification

Photography — Processing chemicals — Specifications for p-methylaminophenol sulfate

Overview ISO 422:1994 - Photography - Processing chemicals - Specifications for p‑methylaminophenol sulfate - defines purity criteria and test methods for photographic‑grade p‑methylaminophenol sulfa…

Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometr…

Overview ISO 4221:1980 - "Air quality - Determination of mass concentration of sulphur dioxide in ambient air - Thorin spectrophotometric method" - specifies a wet-chemical spectrophotometric procedu…