The Platinum-Cobalt Scale (Pt/Co scale or Apha-Hazen Scale ) is a color scale that was introduced in 1892 by chemist Allen Hazen (1869–1930). The index was developed as a way to evaluate pollution levels in waste water. It has since expanded to a common method of comparison of the intensity of yellow-tinted samples. It is specific to the color yellow and is based on dilutions of a 500 ppm platinum cobalt solution. The colour produced by one milligram of platinum cobalt dissolved in one liter of water is fixed as one unit of colour in platinum-cobalt scale. The ASTM has detailed description and procedures in ASTM Designation D1209, "Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)".
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| - Platin-Cobalt-Farbzahl (de)
- Échelle de couleur platine-cobalt (fr)
- Pt/Co scale (en)
- Skala Pt/Co (pl)
- Escala de platina-cobalto (pt)
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| - Die Platin-Cobalt-Farbzahl (kurz Pt/Co), auch APHA-Hazen-Farbzahl nach ihrem Erfinder Allen Hazen, wurde 1892 zu Untersuchung von Abwässern entwickelt. Die Proben werden kolorimetrisch in genormten Gefäßen gegen eine saure Lösung von Kaliumhexachloroplatinat(IV) und Cobalt(II)-chlorid verglichen, die einer Farbzahl entsprechend ihrem Platingehalt zwischen 0 und 500 (mg/l) zugeordnet sind. Die Methode ist spezifisch für gelbliche Färbungen. (de)
- L’échelle de couleur platine-cobalt, également connue sous les noms d’échelle Pt-Co, échelle Hazen (d'après , son inventeur) ou échelle APHA (de l' American Public Health Association) est une échelle de comparaison visuelle de la couleur des liquides clairs et transparents. Les deux premiers noms sont préférés aux deux autres. L'échelle va de 0 (eau distillée) à 500 (jaune clair) unités Hazen équivalents à parties par million de platine-cobalt dans l'eau. D'autres échelles, telles que l'échelle de couleur Saybold et l'échelle de couleur Gardner, peuvent être utilisées selon la clarté de l'échantillon. (fr)
- The Platinum-Cobalt Scale (Pt/Co scale or Apha-Hazen Scale ) is a color scale that was introduced in 1892 by chemist Allen Hazen (1869–1930). The index was developed as a way to evaluate pollution levels in waste water. It has since expanded to a common method of comparison of the intensity of yellow-tinted samples. It is specific to the color yellow and is based on dilutions of a 500 ppm platinum cobalt solution. The colour produced by one milligram of platinum cobalt dissolved in one liter of water is fixed as one unit of colour in platinum-cobalt scale. The ASTM has detailed description and procedures in ASTM Designation D1209, "Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)". (en)
- Skala platynowo-kobaltowa (skala Pt/Co lub skala Apha-Hazena) – jest skalą barwną wprowadzoną w 1892 roku przez chemika (1869-1930). Skala została opracowana jako sposób na określanie poziomu zanieczyszczeń w ściekach wodnych. Od tego czasu skala została upowszechniona do opisywania intensywności żółtego zabarwienia próbek, służy do opisywania koloru żółtego i jest oparta o rozcieńczaniu 500 ppm roztworu platynowo-kobaltowego. Roztwór powstaje w reakcji heksachloroplatynianu potasu (K2PtCl6) z uwodnionym chlorkiem kobaltu (CoCl2•H2O) w środowisku kwasu chlorowodorowego. (pl)
- A Escala platina-cobalto, também designada por escala Pt/Co ou escala APHA-Hazen, é uma escala padronizada de avaliação da cor da cor da água especificamente concebida para detectar os tons de amarelo típicos de efluentes urbanos e de águas contendo matéria orgânica. (pt)
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| - Die Platin-Cobalt-Farbzahl (kurz Pt/Co), auch APHA-Hazen-Farbzahl nach ihrem Erfinder Allen Hazen, wurde 1892 zu Untersuchung von Abwässern entwickelt. Die Proben werden kolorimetrisch in genormten Gefäßen gegen eine saure Lösung von Kaliumhexachloroplatinat(IV) und Cobalt(II)-chlorid verglichen, die einer Farbzahl entsprechend ihrem Platingehalt zwischen 0 und 500 (mg/l) zugeordnet sind. Die Methode ist spezifisch für gelbliche Färbungen. (de)
- L’échelle de couleur platine-cobalt, également connue sous les noms d’échelle Pt-Co, échelle Hazen (d'après , son inventeur) ou échelle APHA (de l' American Public Health Association) est une échelle de comparaison visuelle de la couleur des liquides clairs et transparents. Les deux premiers noms sont préférés aux deux autres. L'échelle va de 0 (eau distillée) à 500 (jaune clair) unités Hazen équivalents à parties par million de platine-cobalt dans l'eau. D'autres échelles, telles que l'échelle de couleur Saybold et l'échelle de couleur Gardner, peuvent être utilisées selon la clarté de l'échantillon. (fr)
- The Platinum-Cobalt Scale (Pt/Co scale or Apha-Hazen Scale ) is a color scale that was introduced in 1892 by chemist Allen Hazen (1869–1930). The index was developed as a way to evaluate pollution levels in waste water. It has since expanded to a common method of comparison of the intensity of yellow-tinted samples. It is specific to the color yellow and is based on dilutions of a 500 ppm platinum cobalt solution. The colour produced by one milligram of platinum cobalt dissolved in one liter of water is fixed as one unit of colour in platinum-cobalt scale. The ASTM has detailed description and procedures in ASTM Designation D1209, "Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)". (en)
- Skala platynowo-kobaltowa (skala Pt/Co lub skala Apha-Hazena) – jest skalą barwną wprowadzoną w 1892 roku przez chemika (1869-1930). Skala została opracowana jako sposób na określanie poziomu zanieczyszczeń w ściekach wodnych. Od tego czasu skala została upowszechniona do opisywania intensywności żółtego zabarwienia próbek, służy do opisywania koloru żółtego i jest oparta o rozcieńczaniu 500 ppm roztworu platynowo-kobaltowego. Roztwór powstaje w reakcji heksachloroplatynianu potasu (K2PtCl6) z uwodnionym chlorkiem kobaltu (CoCl2•H2O) w środowisku kwasu chlorowodorowego. (pl)
- A Escala platina-cobalto, também designada por escala Pt/Co ou escala APHA-Hazen, é uma escala padronizada de avaliação da cor da cor da água especificamente concebida para detectar os tons de amarelo típicos de efluentes urbanos e de águas contendo matéria orgânica. (pt)
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