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electrode_construction [20/06/2016 12:53] pieter [Electrode construction] |
electrode_construction [19/02/2018 13:26] pieter [Junction Types] |
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- | =====Electrode construction===== | + | =====pH Electrode construction===== |
- | ===Combination Electrode=== | + | ====Combination Electrode==== |
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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. | ||
Sleeve junctions provide the highest flow rate for difficult samples. | Sleeve junctions provide the highest flow rate for difficult samples. | ||
- | 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, | * General and low temperature glass is especially suited for low temperature, | ||
* Universal glass is best suited for most pH measurements where minimal or no Na< | * Universal glass is best suited for most pH measurements where minimal or no Na< | ||
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- | =====Internal Reference Types===== | + | ====Internal Reference Types==== |
Calomel reference electrodes (Hg/ | Calomel reference electrodes (Hg/ | ||
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- | =====Reference Construction===== | + | ====Reference Construction==== |
// | // | ||
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- | =====Electrode Construction===== | + | ====Electrode Construction==== |
//**Glass Body Electrodes: | //**Glass Body Electrodes: |