HPLC
Which of the following(s) is/are the advantage of HPLC over traditional LPLC (low-pressure liquid chromatography)?

Sample recovery
Greater sensitivity and reusable columns
Ideal for ionic species and large molecules
All of these

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HPLC
HPLC stands for

both (a) and (b)
High Pressure Liquid Chromatography
Highly Placed Liquid Chromatography
High Performance Liquid Chromatography

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HPLC
Dwell volume is defined as

the volume of the column between the point at which solvents are mixed and the beginning of the column
the volume of solvent contained in a liquid chromatographic column
none of these
the time required for the gradient to reach the column

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