Please choose the correct answer !! 2. for the gas chromatography technique, the mobile phase must be hot a. low boiling
Posted: Fri May 06, 2022 7:45 am
Please choose the correct answer !!
2. for the gas chromatography technique, the mobile
phase must be hot
a. low boiling
point
b.hot
c.any gas
d.chemically
inert
3. When an analyte with a value of Kd=1.2
will take _______ time to elute from the column than one with a
value of Kd=0.3
a. plus
b.less
c. Same
d. cannot be determined
4. Which of the following is not a material used to
construct GC columns?
a. diatomaceous earth
b.silica
c. refractory brick
d.stainless steel
5. An elution profile is given
by
a. the time it takes for the analytes to
elute
b. the first analyte to elute from the
column
c.the order in which the analytes elute from the
column
d. the time required for the solvent to leave the
column
a. ion exchange
b. size exclusion
c. affinity
d. partition
7. In a gas chromatograph the temperature of the column
is __________ that of the injection port for _____
a. Minor; condense sample
b. Minor; avoid condensation
c. high; condense sample
d. high; avoid condemnation
8. The number of theoretical plates can be obtained from
a chromatogram
a. TRUE
b. false
9. All samples that are analyzed on the gas
chromatograph must be in the gas phase before entering the
instrument.
a. TRUE
b. false
10. A fritted glass HPLC column is chemically inert
except
a. for concentrated salts
b. strong acids
c. strong base
d. at high temperatures
11. The major difference between gas chromatography and
liquid chromatography is
a. the type of sample that can be analyzed
b. the status of the samples being analyzed
c. The state of the mobile phase
d. detector type
12. The selectivity factor of a method tells
me
a. The distribution of the analyte between the mobile
phase and the stationary phase
b. The equilibrium state of the mobile
phase
c. The ability of the stationary phase to separate the
samples
d. The relationship between the mobile phase and the
stationary phase
13. A HPLC column resists
a. High temperatures
b. high sample volume
c. large sample concentration
d. high pressure
14. The efficiency of a chromatographic column is
defined according to
a. the mobile phase
b. the stationary phase
c. the number of theoretical plates
d. the material of the column
A Diffusive pore 12 μm Perfusion particle Through pore
2. for the gas chromatography technique, the mobile
phase must be hot
a. low boiling
point
b.hot
c.any gas
d.chemically
inert
3. When an analyte with a value of Kd=1.2
will take _______ time to elute from the column than one with a
value of Kd=0.3
a. plus
b.less
c. Same
d. cannot be determined
4. Which of the following is not a material used to
construct GC columns?
a. diatomaceous earth
b.silica
c. refractory brick
d.stainless steel
5. An elution profile is given
by
a. the time it takes for the analytes to
elute
b. the first analyte to elute from the
column
c.the order in which the analytes elute from the
column
d. the time required for the solvent to leave the
column
- Please Choose The Correct Answer 2 For The Gas Chromatography Technique The Mobile Phase Must Be Hot A Low Boiling 1 (154.31 KiB) Viewed 30 times
b. size exclusion
c. affinity
d. partition
7. In a gas chromatograph the temperature of the column
is __________ that of the injection port for _____
a. Minor; condense sample
b. Minor; avoid condensation
c. high; condense sample
d. high; avoid condemnation
8. The number of theoretical plates can be obtained from
a chromatogram
a. TRUE
b. false
9. All samples that are analyzed on the gas
chromatograph must be in the gas phase before entering the
instrument.
a. TRUE
b. false
10. A fritted glass HPLC column is chemically inert
except
a. for concentrated salts
b. strong acids
c. strong base
d. at high temperatures
11. The major difference between gas chromatography and
liquid chromatography is
a. the type of sample that can be analyzed
b. the status of the samples being analyzed
c. The state of the mobile phase
d. detector type
12. The selectivity factor of a method tells
me
a. The distribution of the analyte between the mobile
phase and the stationary phase
b. The equilibrium state of the mobile
phase
c. The ability of the stationary phase to separate the
samples
d. The relationship between the mobile phase and the
stationary phase
13. A HPLC column resists
a. High temperatures
b. high sample volume
c. large sample concentration
d. high pressure
14. The efficiency of a chromatographic column is
defined according to
a. the mobile phase
b. the stationary phase
c. the number of theoretical plates
d. the material of the column
A Diffusive pore 12 μm Perfusion particle Through pore