Questions from General Chemistry

Q: How do electron and electrospray ionization sources differ? What are the

How do electron and electrospray ionization sources differ? What are the advantages and disadvantages of each?

Q: For the data given in Example 30-1, compare the

For the data given in Example 30-1, compare the method of external standards to the internal standard method. Plot the analyte peak height versus percent analyte, and determine the unknown without usi...

Q: How do gas-liquid and gas-solid chromatography differ?

How do gas-liquid and gas-solid chromatography differ?

Q: Why is gas-solid chromatography not used as extensively as gas

Why is gas-solid chromatography not used as extensively as gas-liquid chromatography?

Q: What kind of mixtures are separated by gas-solid chromatography?

What kind of mixtures are separated by gas-solid chromatography?

Q: Indicate the order of elution of the following compounds from a normal

Indicate the order of elution of the following compounds from a normal-phase packed HPLC column: a) Ethyl acetate, acetic acid, dimethylamine. b) Propylene, hexane, benzene, dichlorobenzene.

Q: Describe the fundamental difference between adsorption and partition chromatography.

Describe the fundamental difference between adsorption and partition chromatography.

Q: Describe the fundamental difference between ion exchange and size-exclusion chromatography

Describe the fundamental difference between ion exchange and size-exclusion chromatography.

Q: Describe the difference between gel-filtration and gel-permeation chromatography

Describe the difference between gel-filtration and gel-permeation chromatography.

Q: What types of species can be separated by GC but not by

What types of species can be separated by GC but not by HPLC?