TERMIUM Plus®

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COLORIMETRIC METHOD [1 record]

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Record 1 2003-01-16

English

Subject field(s)
  • Analytical Chemistry
CONT

The two general methods available for the determination of hydrogen-ion activities and the pH values of solutions are the potentiometric procedures and the colorimetric procedures. ... Colorimetric procedures are based on the fact that definite hydrogen-ion concentrations give definite shades of color to solutions of various organic substances termed acid-base indicators.

French

Domaine(s)
  • Chimie analytique
CONT

La détermination expérimentale du pH [...] s'effectue principalement : 1) par la méthode colorimétrique, rapide mais relativement peu précise; elle est fondée sur l'observation de la teinte prise dans la solution par un indicateur coloré dont la zone de virage comprend le pH cherché; 2) par la méthode électrométrique, précise mais nécessitant un matériel plus important; [...]

Spanish

Campo(s) temático(s)
  • Química analítica
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