This technique is performed in a barrel insert and needle assembly in MEPS ("meps") devices that can process 10 microliter samples. Frozen samples are ground up and mixed with CTAB (see-tab) in a form of this technique preferred when limited results are sufficient. Inputs for this technique are placed in a porous thimble in Soxhlet ("SOAKS"-"late")-type setups. Adding brine may be necessary in this technique if two inputs have similar log P values. Magnetic beads prevent nucleic acids from being washed away in an equipment-free form of this technique, though its phenol-chloroform type is more used for DNA. Halogenated (HAL-uh-gen-ay-tid) solutions form heavier organic phases in this technique after a piece of conical glassware undergoes cycles of shaking, flipping, and venting. For 10 points, name this technique in which a separatory funnel is used to partition solvents of different densities. ■END■
ANSWER: extraction [or liquid-liquid extraction; or solid-phase microextraction; or solvent partitioning until "partition" is read; prompt on LLE or SPME; prompt on isolation or separation or purification]
<Sean Farrell , Science - Chemistry - Analytical/Lab>
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