An Analyst Sets Up an SPE Separation Using a Solid

question 2

Multiple Choice

An analyst sets up an SPE separation using a solid phase containing C-18 (non-polar) . After conditioning and rinsing steps, the elution solvent they use is methanol. This is an example of

• A) normal phase (NP)
• B) reversed phase (RP)
• C) cation exchange (AX)
• D) anion exchange (CX)
• E) none of the above

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Definitions:

Glossopharyngeal Nerve

The ninth cranial nerve, responsible for sensory and motor functions in the throat, including taste sensation and swallowing.

Mastication

The activity of processing food by chewing, aimed at preparing it for swallowing and digestion.

Chemical Bonds

The attraction between atoms that allows the formation of chemical substances containing two or more atoms.

Contact Digestion

The process by which nutrients are broken down in the small intestine where enzymes directly act on the food.