WorksheetsCHM 260 GC
Total questions: 10
Worksheet time: 5mins
what is gas chromatigraphy?
separation components by molecular weight
separation components based on volatility
separation components based on size
separation components based on type of gas
What is the basic principle for GC?
sample being injected into column, transported by column flow and detected by detector
sample being analyzed using gas and separated using funnel separation
sample being purged using gas until it fully dried
sample being injected to mobile phase through until reach stationary phase
which one is NOT capillary column?
Fused silica wall coated
Wall coated
support coated
diamond coated
Which one is the gc column?
packed column
thick column
capillary column
stationary column
What is the ideal characteristics for detectors?
high relialibility and ease to use
good stability and reproducibility
short response time and independent flow rate
all of above
Which one is NOT the types of detectors?
Flame ionization detector
thermal conductivity
electron repulsive conductivity
electron captured detector
What is the factor that NOT affected GC separation?
volatility of the compound
polarity of compounds
size of compounds
flow rate of the gas
What is the desirable properties of immobilized liquid stationary phase?
Low volatility
High concentration
thermal stability
chemically inert or inreactive
what is the advantages of thermal conductivity detector?
non destructive
low sensitivity
large thermal stability
low molecular weight
What is the disadvantages of thermal conductivity detector?
simplicity
low sensitivity
non destructive
large linear dynamic range
