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

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

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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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HPLC
HPLC methods include

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

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