Question

The purpose of use of C18 in extraction process is to
A Absorbs residual water
B Absorbs inorganic impurities
co Retains fatty acids and cholesterol
0 Removes organic acids and carbohydrates
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Answer 1

Answer:

Reversed-Phase: C18 strongly hydrophobic silica-based bonded phase; used to adsorb analytes of even weak hydrophobicity from aqueous solutions; typical applications include drugs and their metabolites in serum, plasma or urine, desalting of peptides, trace organics in environmental water samples, organic acids

Answer 2

Answer:

0 Removes organic acids and carbohydrates