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electrode_construction

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electrode_construction [20/06/2016 12:53]
pieter [Electrode construction] 		electrode_construction [20/06/2016 13:03]
pieter
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-=====Electrode construction===== +=====pH Electrode construction===== 
-===Combination Electrode===+====Combination Electrode====
  
 {{:pictures/ph_junction2.jpg?200 }} {{:pictures/ph_junction2.jpg?200 }}
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-=====Junction Types=====+====Junction Types====
 Glass combination electrodes mostly feature an anti-fouling annular ceramic junction. The annular junction is formulated with a special ceramic which encircles the glass bulb. Numerous pores in the ceramic provide lower resistance and more stable pH readings. The epoxy body combination electrodes come standard with a specially formulated porous ceramic plug junction. Glass combination electrodes mostly feature an anti-fouling annular ceramic junction. The annular junction is formulated with a special ceramic which encircles the glass bulb. Numerous pores in the ceramic provide lower resistance and more stable pH readings. The epoxy body combination electrodes come standard with a specially formulated porous ceramic plug junction.
  
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 A double junction reference is constructed with an Ag/AgCl inner chamber and a chemically compatible reference solution in the outer chamber. It is recommended for samples containing organic compounds, proteins, heavy metals, and other compounds that interact with silver, such as bromides, iodides, cyanides, and sulphides. A double junction reference is constructed with an Ag/AgCl inner chamber and a chemically compatible reference solution in the outer chamber. It is recommended for samples containing organic compounds, proteins, heavy metals, and other compounds that interact with silver, such as bromides, iodides, cyanides, and sulphides.
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-=====Membrane Types=====+====Membrane Types====
   * General and low temperature glass is especially suited for low temperature, non aqueous solutions and pH measurements under 12 pH.   * General and low temperature glass is especially suited for low temperature, non aqueous solutions and pH measurements under 12 pH.
   * Universal glass is best suited for most pH measurements where minimal or no Na<sup>+</sup> is present. It is a low-resistant glass with a very fast and stable response and is designed for pH ranges of 0 to 13 and temperatures of 0° to 135°C.   * Universal glass is best suited for most pH measurements where minimal or no Na<sup>+</sup> is present. It is a low-resistant glass with a very fast and stable response and is designed for pH ranges of 0 to 13 and temperatures of 0° to 135°C.
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-=====Internal Reference Types=====+====Internal Reference Types====
  
 Calomel reference electrodes (Hg/Hg<sub>2</sub>Cl<sub>2</sub>) can give very accurate potentials. Both its reproducibility and potential stability are superior to those of the Ag/AgCl electrode, although only at a constant and relatively low temperature. Calomel is subject to a constant and relatively low temperature fluctuation with a temperature limitation of 80°C. Calomel reference electrodes (Hg/Hg<sub>2</sub>Cl<sub>2</sub>) can give very accurate potentials. Both its reproducibility and potential stability are superior to those of the Ag/AgCl electrode, although only at a constant and relatively low temperature. Calomel is subject to a constant and relatively low temperature fluctuation with a temperature limitation of 80°C.
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-=====Reference Construction=====+====Reference Construction====
  
 //**Refillable Reference Cell:**// selected for high accuracy, stability, and longer electrode life. Refillable types sacrifice convenience and ease of maintenance. //**Refillable Reference Cell:**// selected for high accuracy, stability, and longer electrode life. Refillable types sacrifice convenience and ease of maintenance.
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-=====Electrode Construction=====+====Electrode Construction====
  
 //**Glass Body Electrodes:**// ideally suited for most routine pH measurements for accuracy, high temperature, and ease of cleaning. //**Glass Body Electrodes:**// ideally suited for most routine pH measurements for accuracy, high temperature, and ease of cleaning.
electrode_construction.txt · Last modified: 18/10/2019 10:20 by pieter

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