GC-MS
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| methods for sample intro: | 1. Batch lnlet
2. Direct Probe
3. Chromatograph- Gc C & LC
4. Plasmas- ICP& MIP
🗑
|
||||
| interfacing GC to a MS depends on | the type of column that is being used
🗑
|
||||
| What is necessary to do if megaprobe or a standard packed column is used and how it is accomplished? | remove the bulk of the mobile phase b4 introducing the analyte into MS.
accomplished bu using "jet separator"
🗑
|
||||
| Methods of ionization in ionization chamber | 1. Gas-phase sources: sample is vaporized and then ionized. Used for thermally-stable species
2. Desorption sources: sample (liquid or solid) . used for non-volatile and thermally unstable species
🗑
|
||||
| Several methods for ionization: | 1. Electron-impact source(El)
2. Chemical lionization source(Cl)
3. Field lonization source(F l)
4. Desorption sources
🗑
|
||||
| Electron-impact source(El) | advantages: convenient to use; good sensitivity; good sensitivity; extensive fragmentation.
Disadvantages: no molecular ion.
limited sample : Molecular mass and boiling point
🗑
|
||||
| Mass analyzer: | 1. Magnetic sector
2.double focusing
3. Time-of-flight
4.Quadrupole.
🗑
|
||||
| detectors: | 1. Faraday Cup
2. Electron Multiplier
3.Photographic Plate
4. Scintillation-type
🗑
|
||||
| types of electron multiplier | 1.discrete dynode type
2.continuous dynode type
🗑
|
||||
| Does path depend on the kinetic energy or angular momentum of ions in quadruple mass ionizer? | NO- highr throuput of ions
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
K@t
Popular Chemistry sets