During Calibration of a Clark Polarographic O₂ Analyzer, You Cannot

question 75

Multiple Choice

During calibration of a Clark polarographic O₂ analyzer, you cannot get the sensor to read 100% when exposed to 100% O₂, even after adjusting its calibration control. The unit has new batteries. Which of the following actions would be correct?

• A) Use it only with low FiO₂ values.
• B) Send the device out for repair.
• C) Replace the unit's batteries.
• D) Change the sensor or electrode.

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Definitions:

Chirality Centers

Specific atoms within a molecule that have four different groups attached, resulting in non-superimposable mirror images.

Chiral Molecule

A molecule that cannot be superimposed on its mirror image, often having a carbon atom bonded to four different groups.

Chiral

Describes a molecule that has a non-superimposable mirror image, often leading to molecules with distinct left-handed (S) and right-handed (R) configurations.

Achiral

Describing a molecule that is superimposable on its mirror image, indicating it has no handedness or enantiomers.