Britton–Robinson buffer (aka BRB aka PEM) is a "universal" pH buffer used for the pH range from 2 to 12. Universal buffers consist of mixtures of acids of diminishing strength (increasing pKa), so that the change in pH is approximately proportional to the amount of alkali added. It consists of a mixture of 0.04 M boric acid, 0.04 M phosphoric acid and 0.04 M acetic acid that has been titrated to the desired pH with 0.2 M sodium hydroxide. Britton and Robinson also proposed a second formulation that gave an essentially linear pH response to added alkali from pH 2.5 to pH 9.2 (and buffers to pH 12). This mixture consists of 0.0286 M citric acid, 0.0286 M monopotassium phosphate, 0.0286 M boric acid, 0.0286 M veronal and 0.0286 M hydrochloric acid titrated with 0.2 M sodium hydroxide.
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| - Britton–Robinson buffer (en)
- Tampón de Britton-Robinson (es)
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| - Britton–Robinson buffer (aka BRB aka PEM) is a "universal" pH buffer used for the pH range from 2 to 12. Universal buffers consist of mixtures of acids of diminishing strength (increasing pKa), so that the change in pH is approximately proportional to the amount of alkali added. It consists of a mixture of 0.04 M boric acid, 0.04 M phosphoric acid and 0.04 M acetic acid that has been titrated to the desired pH with 0.2 M sodium hydroxide. Britton and Robinson also proposed a second formulation that gave an essentially linear pH response to added alkali from pH 2.5 to pH 9.2 (and buffers to pH 12). This mixture consists of 0.0286 M citric acid, 0.0286 M monopotassium phosphate, 0.0286 M boric acid, 0.0286 M veronal and 0.0286 M hydrochloric acid titrated with 0.2 M sodium hydroxide. (en)
- El tampón de Britton-Robinson (también conocido como BRB, también conocido como PEM) es un tampón de pH "universal" utilizado para el rango de pH 2 a pH 12. Los tampones universales consisten en mezclas de ácidos de fuerza decreciente (que aumentan el pKa), de modo que el cambio en el pH es aproximadamente proporcional a la cantidad de álcali agregado. Se compone de una mezcla de 0,04 M de H3BO3, 0,04 M de H3PO4 y 0,04 M de CH3COOH que ha sido valorada al pH deseado con 0,2 M de NaOH. Britton y Robinson también propusieron una segunda formulación que dio una respuesta de pH esencialmente lineal al álcali agregado de pH 2.5 a pH 9.2 (y tampones a pH 12). Esta mezcla se compone de 0,0286 M de ácido cítrico, 0,0286 M , 0,0286 MH3BO3, 0,0286 M barbital y M 0,0286 HCl titula con NaOH 0,2 M. (es)
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| - Britton–Robinson buffer (aka BRB aka PEM) is a "universal" pH buffer used for the pH range from 2 to 12. Universal buffers consist of mixtures of acids of diminishing strength (increasing pKa), so that the change in pH is approximately proportional to the amount of alkali added. It consists of a mixture of 0.04 M boric acid, 0.04 M phosphoric acid and 0.04 M acetic acid that has been titrated to the desired pH with 0.2 M sodium hydroxide. Britton and Robinson also proposed a second formulation that gave an essentially linear pH response to added alkali from pH 2.5 to pH 9.2 (and buffers to pH 12). This mixture consists of 0.0286 M citric acid, 0.0286 M monopotassium phosphate, 0.0286 M boric acid, 0.0286 M veronal and 0.0286 M hydrochloric acid titrated with 0.2 M sodium hydroxide. This buffer was invented in 1931 by the English chemist Hubert Thomas Stanley "Kevin" Britton (1892–1960) and the New Zealand chemist Robert Anthony Robinson (1904–1979). (en)
- El tampón de Britton-Robinson (también conocido como BRB, también conocido como PEM) es un tampón de pH "universal" utilizado para el rango de pH 2 a pH 12. Los tampones universales consisten en mezclas de ácidos de fuerza decreciente (que aumentan el pKa), de modo que el cambio en el pH es aproximadamente proporcional a la cantidad de álcali agregado. Se compone de una mezcla de 0,04 M de H3BO3, 0,04 M de H3PO4 y 0,04 M de CH3COOH que ha sido valorada al pH deseado con 0,2 M de NaOH. Britton y Robinson también propusieron una segunda formulación que dio una respuesta de pH esencialmente lineal al álcali agregado de pH 2.5 a pH 9.2 (y tampones a pH 12). Esta mezcla se compone de 0,0286 M de ácido cítrico, 0,0286 M , 0,0286 MH3BO3, 0,0286 M barbital y M 0,0286 HCl titula con NaOH 0,2 M. Esto fue inventado en 1931 por el químico inglés Hubert Thomas Stanley "Kevin" Britton (1892 – 1960) con el químico neozelandés Robert Anthony Robinson (1904-1979). (es)
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