Expain the direction in which the retention time would change for a substance in a GC experiment when the experimental parameters as changed as shown below.
a). column temperature decreased.
b). carrier gas flow rate increased
c). concentration of stationary phase liquid increased
d). detector temperature increased 10 degrees C
e). amount of sample injected decreased 20%
2006-10-30 05:54:45 · 2 answers · asked by kelxcore09 1 in Science & Mathematics ➔ Chemistry
a. Increases - lowering temperature decreases the diffusion of the substance off of the column
b. Decreases
c. Increases - if the column is packed more tightly, the substance will have a harder time getting through
d. none
e. none
2006-10-30 10:24:32 · answer #1 · answered by davisoldham 5 · 0⤊ 0⤋
a. retention time longer
b. retention time shorter
c. retention time longer
d.maybe retention time will stay the same
e. retention time may stay the same or be a little bit shorter.
2006-10-30 16:25:54 · answer #2 · answered by redballoon 4 · 0⤊ 0⤋