HPLC
Which of the following statements is true for a refractive index detector in HPLC?

none of above
It is more sensitive than a UV detector
It does not respond to many solutes
It can only be used for isocratic elutions

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HPLC
HPLC methods include

liquid/solid (adsorption) chromatography
All of these
liquid/liquid (partition) chromatography
ion exchange and size exclusion chromatography

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HPLC
Void volume refers to the

total volume of eluent in the column the remainder being taken up by the packing material
the time required for the gradient to reach the column
the volume of solvent contained in a liquid chromatographic column
the volume of the column between the point at which solvents are mixed and the beginning of the column

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HPLC
HPLC stands for

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

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HPLC
Column efficiency is measured in terms of number of plates which is

directly related to the square of the peak width
inversely related to the cube root of the peak width
directly related to the square of the peak width
inversely related to the square of the peak width

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