Improvements in a fast potentiometric seawater alkalinity determination
In the present paper, we introduce some methodological improvements in a potentiometric technique for determining seawater alkalinity. This fast method (about two minutes per sample) uses open flasks and an ordinary titration system without thermostatic bath. A new potassium hydrogen phtha...
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| Autores principales: | , , , |
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| Formato: | Online |
| Lenguaje: | eng |
| Publicado: |
Iniversidad Autónoma de Baja California
2000
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| Acceso en línea: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/592 |
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| Sumario: | In the present paper, we introduce some methodological improvements in a potentiometric technique for determining seawater alkalinity. This fast method (about two minutes per sample) uses open flasks and an ordinary titration system without thermostatic bath. A new potassium hydrogen phthalate-borax 4.4 buffer is proposed to calibrate the electrode near the end point of the titration. The pH values of this new buffer at different pH-scales and temperatures were determined using spectrophotometry. The combined use of this easy and improved two end-point method for alkalinity determination and certified reference material enables the alkalinity to be determined with an accuracy lower than 1µmolkg–1(0.05%). |
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