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EspañolAMERICAN PUBLIC HEALTH ASSOCIATION
The 'American Public Health Association' (APHA) is Washington, D.C.-based professional organization for public health professionals in the United States. Founded in 1872 by Dr. Stephen Smith, APHA has more than 30,000 members worldwide. The Association defines itself as being "the oldest, largest and most diverse organization of public health professionals in the world." It defines its mission as: "The association works to protect all Americans and their communities from preventable, serious health threats. APHA represents a broad array of health officials, educators, environmentalists, policy-makers and health providers at all levels working both within and outside governmental organizations and educational institutions."[1]
The 'Platinum-Cobalt Scale' (or 'Pt/Co scale') is a color scale that was introduced in 1892 by chemist A. Hazen. 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 off of dilutions of a 500 ppm platinum cobalt solution. The ASTM has detailed description and procedures in ASTM Designation D1209, "Standard Test Method doe Color of Clear Liquids (Platinum-Cobalt Scale)."[2][3][4]
The APHA is a partner in the Campaign for Children's Health Care, a multi-year campaign to raise awareness about the problem of uninsured children in America - a growing social concern.
1. http://www.apha.org
2. http://www.hunterlab.com/appnotes/an11_96br3.pdf
3. Designation D1209-00, "Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)," ASTM International, West Conshohocken, PA, 2000
4. Hazen, A., "The Measurement of the Colors of Natural Waters," American Chemist Journal (18:264), 1896
★ American Public Health Association - APHA
★ Campaign for Children's Health Care
★ American Journal of Public Health - AJPH
★ The Nation's Health
★ Get Ready Campaign
| Contents |
| APHA Color Scale |
| Campaign for Children's Health Care |
| References |
| External links |
APHA Color Scale
The 'Platinum-Cobalt Scale' (or 'Pt/Co scale') is a color scale that was introduced in 1892 by chemist A. Hazen. 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 off of dilutions of a 500 ppm platinum cobalt solution. The ASTM has detailed description and procedures in ASTM Designation D1209, "Standard Test Method doe Color of Clear Liquids (Platinum-Cobalt Scale)."[2][3][4]
Campaign for Children's Health Care
The APHA is a partner in the Campaign for Children's Health Care, a multi-year campaign to raise awareness about the problem of uninsured children in America - a growing social concern.
References
1. http://www.apha.org
2. http://www.hunterlab.com/appnotes/an11_96br3.pdf
3. Designation D1209-00, "Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)," ASTM International, West Conshohocken, PA, 2000
4. Hazen, A., "The Measurement of the Colors of Natural Waters," American Chemist Journal (18:264), 1896
External links
★ American Public Health Association - APHA
★ Campaign for Children's Health Care
★ American Journal of Public Health - AJPH
★ The Nation's Health
★ Get Ready Campaign
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