MCQs on Solid Phase Extraction

What does SPE stand for?

• Solid Particle Emission

• Solid Phase Extraction

• Sample Phase Evaluation

• Silica Particle Extraction

SPE is primarily used to:

• Boil the samples

• Remove analytes from gas phase

• Clean and concentrate samples

• Freeze samples

In SPE, the sample is passed through a:

• Vacuum chamber

• Stationary phase

• Centrifuge

• Electrode

Which type of interaction is involved in normal phase SPE?

• Ionic bonds

• Polar interactions

• Covalent bonds

• Magnetic attraction

Reversed phase SPE uses which type of stationary phase?

• Polar

• Hydrophilic

• Non-polar

• Radioactive

Which phase is usually polar in reversed phase SPE?

• Stationary phase

• Mobile phase

• Both phases

• None

Ion exchange SPE is based on:

• Hydrogen bonding

• Electrostatic attraction

• Hydrophobic interactions

• Dipole-dipole bonding

Which group is found in strong anion exchanger (SAX)?

• Sulfonic acid

• Quaternary amine

• Carboxylic acid

• Alcohol

What does SCX stand for?

• Silica coated exchange

• Strong cation exchanger

• Simple cation exchange

• Solid carbon extractor

The first step in SPE procedure is:

• Add the sample

• Elute the sample

• Select the proper tube or disk

• Wash the packing