Popular lines of products used in this technique include the Phenomenex Luna and the Agilent Zorbax, which are partially named in reference to the octadecyl group. Depending on whether the composition of a constituent in this technique changes, its mode is termed “isocratic” or “gradient.” Changing the polarity of substances involved (10[1])in one form of this (10[1])technique results in its “reverse-phase” variant. (10[1])Porous silica gel (10[1])is used (10[1])to “pack” the walls of columns in one form (10[1]-5[1])of (10[1])this technique (10[2])named for (-5[1])being (10[1])“high-performance.” Pigments (10[1])can be distinguished (10[1])in one form of this technique by submerging traces of them placed on cellulose-based paper. For 10 points, name this technique that dissolves a mixture in a mobile phase before moving it (10[1])through a stationary phase (-5[1])to separate its components. ■END■