Question: multiple choices 6. Gradient techniques: (A) Temperature programming is commonly used in HPLC, (B) pH Gradient is useful for the separation of the metal ion

multiple choices

6. Gradient techniques: (A) Temperature programming is commonly used in HPLC,

(B) pH Gradient is useful for the separation of the metal ion by HPLC using

a cation exchanger, (C) Change in salt concentration is commonly used to

improve the separation of proteins by HPLC, (D) Change in solution polarity

is useful for the separation of neutral compounds by reversed phase HPLC,

(E) Change in temperature is useful to improve the separation of DNA in CE.

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