Chem 287_Chapter 15

Chem 287_Chapter 15 - 287 Chapter 15: Electrode...

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287 Chemistry Salin Ch 15 Page 1 287 Chapter 15: Electrode Measurements Silver Electrode Warm up Junction Potential? What is it? Ion-Selective Electrodes Important! pH Measurement with a glass electrode The most important ion-selective electrode 287 Chemistry Salin Ch 15 Page 2 Ion Selective Electrodes Na + , K + , Cl - , pH First three are part of the “Chem 7” which is 70% of hospital lab test load pH probably the single most commonly done test.
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287 Chemistry Salin Ch 15 Page 3 287 Chemistry Salin Ch 15 Page 4 Multispecies sensor for monitoring hearts
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287 Chemistry Salin Ch 15 Page 5 Structure of ion sensing dot used in the “Flexible Sensor Array” 287 Chemistry Salin Ch 15 Page 6 Blood flow to the heart is stopped at time 0, then picks up at about 10 minutes. Extracellular means “outside the cell”
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287 Chemistry Salin Ch 15 Page 7 Junction Potential due to difference in ion mobilities Basis for ion-selective electrodes Not balanced! Small Potential 287 Chemistry Salin Ch 15 Page 8 Junction Potential in a Salt Bridge Figure 14-3 What happens if the Cl- and K+ don’t have the same mobility? Junction Potential
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287 Chemistry Salin Ch 15 Page 9 287 Chemistry Salin Ch 15 Page 10 15-5. Response of 14 different Ca ion sensors. Differences in part due to
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This note was uploaded on 07/15/2011 for the course CHEM 287 taught by Professor Burns during the Fall '08 term at McGill.

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Chem 287_Chapter 15 - 287 Chapter 15: Electrode...

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