Which of the following statements are true for GC columns?
I GC columns are capillaries composed of fused silica and coated with a polyimide.
II Column inner diameters are typically 0.10 cm to 0.53 cm and the columns are 15 cm to 100 cm in length,with 30 cm the most common.
III A wall-coated open tubular column has a liquid stationary phase coating the inside wall of the column.
IV A porous-layer column is filled with a highly porous stationary phase.
V A packed column is a column filled with a solid stationary support coated in liquid stationary phase.
A)I,III,and V
B)II and IV
C)III,IV,and V
D)I and II
E)I,II,III,IV,and V

Question

Quizplus · Accepted Answer

Statement I, III, and V are true. GC columns are typically capillaries made of fused silica (I), wall-coated open tubular columns have a liquid stationary phase on the wall (III), and packed columns have a solid support coated with a liquid stationary phase (V). Statement II is incorrect because the typical lengths and diameters mentioned are not accurate for GC columns. Statement IV is incorrect because porous-layer columns have a porous layer, not a highly porous stationary phase.

Which of the Following Statements Are True for GC Columns