Electrodes
Electrode Selection
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Select proper reference for application
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Select proper junction for application
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Select appropriate body and membrane profile
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Standard
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semi-micro
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micro
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rugged bulb
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spear tip
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flat surface
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Select appropriate body type
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Select refillable or gel filled
Advantages of Thermo's ROSS pH electrodes:
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Variety of body styles
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Very stable reference
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Fast response
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Stable to 0.01 pH in 30 seconds over 50 oC temperature change
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Drift less than .002 pH units/day
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0.01 pH precision
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No Ag/Cl in reference system
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Can measure samples containing Cysteine ( milk & milk related products )
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Better for TRIS buffers
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Ag+ is toxic – Ross is preferred choice for biological samples & culture media
Ross electrodes are all double junction – popular choice for non aqueous pH measurements such a titration.