Gas chromatography flame ionization detector (FID) - why hydrogen gas?Why do batteries specifically vent *hydrogen* in the event of abuse?Reaction mechanism of combustion of hydrogenWhy is the ionization energy for Hydrogen non-zero?Why is the electronegativity of hydrogen 2.20?Why are hydrogen ions always associated with another molecule?Stability of ortho and para hydrogenIs water a possible fuel for jet engines?Hydrogen venting: Why no flame arrestors?Pre-Hydrogen Feature On the Output Of a Gas Chromatography Thermal Conductivity DetectorUse a solid or liquid stationary phase in gas chromatography
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Gas chromatography flame ionization detector (FID) - why hydrogen gas?
Why do batteries specifically vent *hydrogen* in the event of abuse?Reaction mechanism of combustion of hydrogenWhy is the ionization energy for Hydrogen non-zero?Why is the electronegativity of hydrogen 2.20?Why are hydrogen ions always associated with another molecule?Stability of ortho and para hydrogenIs water a possible fuel for jet engines?Hydrogen venting: Why no flame arrestors?Pre-Hydrogen Feature On the Output Of a Gas Chromatography Thermal Conductivity DetectorUse a solid or liquid stationary phase in gas chromatography
$begingroup$
Why is $ceH2$ used in an FID, apart from the fact its combustion does not contaminate the flame?
In other words, is the temperature of the flame important or critical? Is the stability of the temperature?
hydrogen chromatography
edited 5 hours ago
Peter Mortensen
216110
asked 13 hours ago
Dirk BruereDirk Bruere
612514
$endgroup$
add a comment |
$begingroup$
Why is $ceH2$ used in an FID, apart from the fact its combustion does not contaminate the flame?
In other words, is the temperature of the flame important or critical? Is the stability of the temperature?
hydrogen chromatography
edited 5 hours ago
Peter Mortensen
216110
asked 13 hours ago
Dirk BruereDirk Bruere
612514
$endgroup$
$begingroup$
What alternative would you suggest ? E.g.a methane-air flame in FID would be like e.g using methylchloride as the makeup gas in ECD.
$endgroup$
– Poutnik
12 hours ago
$begingroup$
@Poutnik One alternative would be electric arc ionization. Another extreme UV. What is special about H2?
$endgroup$
– Dirk Bruere
12 hours ago
1
$begingroup$
It would be even much worse than methane. The key is to keep as low baseline ionisation as possible. That does not happen with methane flame and definitely not with arc or UV ionisation. With the arc, there would be additionally very high noise, several orders higher than useful signal.
$endgroup$
– Poutnik
11 hours ago
add a comment |
$begingroup$
Why is $ceH2$ used in an FID, apart from the fact its combustion does not contaminate the flame?
In other words, is the temperature of the flame important or critical? Is the stability of the temperature?
hydrogen chromatography
edited 5 hours ago
Peter Mortensen
216110
asked 13 hours ago
Dirk BruereDirk Bruere
612514
$endgroup$
Why is $ceH2$ used in an FID, apart from the fact its combustion does not contaminate the flame?
In other words, is the temperature of the flame important or critical? Is the stability of the temperature?
hydrogen chromatography
hydrogen chromatography
edited 5 hours ago
Peter Mortensen
216110
asked 13 hours ago
Dirk BruereDirk Bruere
612514
edited 5 hours ago
Peter Mortensen
216110
asked 13 hours ago
Dirk BruereDirk Bruere
612514
edited 5 hours ago
Peter Mortensen
216110
edited 5 hours ago
Peter Mortensen
216110
edited 5 hours ago
Peter Mortensen
216110
216110
asked 13 hours ago
Dirk BruereDirk Bruere
612514
asked 13 hours ago
Dirk BruereDirk Bruere
612514
asked 13 hours ago
Dirk BruereDirk Bruere
612514
612514
$begingroup$
What alternative would you suggest ? E.g.a methane-air flame in FID would be like e.g using methylchloride as the makeup gas in ECD.
$endgroup$
– Poutnik
12 hours ago
$begingroup$
@Poutnik One alternative would be electric arc ionization. Another extreme UV. What is special about H2?
$endgroup$
– Dirk Bruere
12 hours ago
1
$begingroup$
It would be even much worse than methane. The key is to keep as low baseline ionisation as possible. That does not happen with methane flame and definitely not with arc or UV ionisation. With the arc, there would be additionally very high noise, several orders higher than useful signal.
$endgroup$
– Poutnik
11 hours ago
add a comment |
$begingroup$
What alternative would you suggest ? E.g.a methane-air flame in FID would be like e.g using methylchloride as the makeup gas in ECD.
$endgroup$
– Poutnik
12 hours ago
$begingroup$
@Poutnik One alternative would be electric arc ionization. Another extreme UV. What is special about H2?
$endgroup$
– Dirk Bruere
12 hours ago
1
$begingroup$
It would be even much worse than methane. The key is to keep as low baseline ionisation as possible. That does not happen with methane flame and definitely not with arc or UV ionisation. With the arc, there would be additionally very high noise, several orders higher than useful signal.
$endgroup$
– Poutnik
11 hours ago
$begingroup$
What alternative would you suggest ? E.g.a methane-air flame in FID would be like e.g using methylchloride as the makeup gas in ECD.
$endgroup$
– Poutnik
12 hours ago
$begingroup$
What alternative would you suggest ? E.g.a methane-air flame in FID would be like e.g using methylchloride as the makeup gas in ECD.
$endgroup$
– Poutnik
12 hours ago
$begingroup$
@Poutnik One alternative would be electric arc ionization. Another extreme UV. What is special about H2?
$endgroup$
– Dirk Bruere
12 hours ago
$begingroup$
@Poutnik One alternative would be electric arc ionization. Another extreme UV. What is special about H2?
$endgroup$
– Dirk Bruere
12 hours ago
1
1
$begingroup$
It would be even much worse than methane. The key is to keep as low baseline ionisation as possible. That does not happen with methane flame and definitely not with arc or UV ionisation. With the arc, there would be additionally very high noise, several orders higher than useful signal.
$endgroup$
– Poutnik
11 hours ago
$begingroup$
It would be even much worse than methane. The key is to keep as low baseline ionisation as possible. That does not happen with methane flame and definitely not with arc or UV ionisation. With the arc, there would be additionally very high noise, several orders higher than useful signal.
$endgroup$
– Poutnik
11 hours ago
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
The key to the answer is the understanding how FID works.
The hydrogen flame has a minimal flame ionisation, what is needed for the low signal baseline.
Incoming organic molecules from the HPGC column create in the flame a lot of ions and increase the flame electric conductivity.
Using alternatives causing higher ionisation would decrease FID sensitivity that is not great even at ideal conditions, compared to e.g. ECD.
answered 11 hours ago
PoutnikPoutnik
2,816617
$endgroup$
add a comment |
$begingroup$
Another fundamental aspect for using hydrogen in gas chromatography is the so-called van Deemter curve. The curve shows linear velocity of the gas on the x-axis and plate heights on the y-axis. It can be shown that by using hydrogen one can obtain the best efficiency as compared to any other gas.
And of course hydrogen is required for burning the organic molecules exiting the column. It is a clean flame (no carbon background).
answered 2 hours ago
M. FarooqM. Farooq
2,950316
$endgroup$
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The key to the answer is the understanding how FID works.
The hydrogen flame has a minimal flame ionisation, what is needed for the low signal baseline.
Incoming organic molecules from the HPGC column create in the flame a lot of ions and increase the flame electric conductivity.
Using alternatives causing higher ionisation would decrease FID sensitivity that is not great even at ideal conditions, compared to e.g. ECD.
answered 11 hours ago
PoutnikPoutnik
2,816617
$endgroup$
add a comment |
$begingroup$
The key to the answer is the understanding how FID works.
The hydrogen flame has a minimal flame ionisation, what is needed for the low signal baseline.
Incoming organic molecules from the HPGC column create in the flame a lot of ions and increase the flame electric conductivity.
Using alternatives causing higher ionisation would decrease FID sensitivity that is not great even at ideal conditions, compared to e.g. ECD.
answered 11 hours ago
PoutnikPoutnik
2,816617
$endgroup$
add a comment |
$begingroup$
The key to the answer is the understanding how FID works.
The hydrogen flame has a minimal flame ionisation, what is needed for the low signal baseline.
Incoming organic molecules from the HPGC column create in the flame a lot of ions and increase the flame electric conductivity.
Using alternatives causing higher ionisation would decrease FID sensitivity that is not great even at ideal conditions, compared to e.g. ECD.
answered 11 hours ago
PoutnikPoutnik
2,816617
$endgroup$
The key to the answer is the understanding how FID works.
The hydrogen flame has a minimal flame ionisation, what is needed for the low signal baseline.
Incoming organic molecules from the HPGC column create in the flame a lot of ions and increase the flame electric conductivity.
Using alternatives causing higher ionisation would decrease FID sensitivity that is not great even at ideal conditions, compared to e.g. ECD.
answered 11 hours ago
PoutnikPoutnik
2,816617
edited 10 hours ago
answered 11 hours ago
PoutnikPoutnik
2,816617
answered 11 hours ago
PoutnikPoutnik
2,816617
answered 11 hours ago
PoutnikPoutnik
2,816617
2,816617
add a comment |
add a comment |
$begingroup$
Another fundamental aspect for using hydrogen in gas chromatography is the so-called van Deemter curve. The curve shows linear velocity of the gas on the x-axis and plate heights on the y-axis. It can be shown that by using hydrogen one can obtain the best efficiency as compared to any other gas.
And of course hydrogen is required for burning the organic molecules exiting the column. It is a clean flame (no carbon background).
answered 2 hours ago
M. FarooqM. Farooq
2,950316
$endgroup$
add a comment |
$begingroup$
Another fundamental aspect for using hydrogen in gas chromatography is the so-called van Deemter curve. The curve shows linear velocity of the gas on the x-axis and plate heights on the y-axis. It can be shown that by using hydrogen one can obtain the best efficiency as compared to any other gas.
And of course hydrogen is required for burning the organic molecules exiting the column. It is a clean flame (no carbon background).
answered 2 hours ago
M. FarooqM. Farooq
2,950316
$endgroup$
add a comment |
$begingroup$
Another fundamental aspect for using hydrogen in gas chromatography is the so-called van Deemter curve. The curve shows linear velocity of the gas on the x-axis and plate heights on the y-axis. It can be shown that by using hydrogen one can obtain the best efficiency as compared to any other gas.
And of course hydrogen is required for burning the organic molecules exiting the column. It is a clean flame (no carbon background).
answered 2 hours ago
M. FarooqM. Farooq
2,950316
$endgroup$
Another fundamental aspect for using hydrogen in gas chromatography is the so-called van Deemter curve. The curve shows linear velocity of the gas on the x-axis and plate heights on the y-axis. It can be shown that by using hydrogen one can obtain the best efficiency as compared to any other gas.
And of course hydrogen is required for burning the organic molecules exiting the column. It is a clean flame (no carbon background).
answered 2 hours ago
M. FarooqM. Farooq
2,950316
answered 2 hours ago
M. FarooqM. Farooq
2,950316
answered 2 hours ago
M. FarooqM. Farooq
2,950316
answered 2 hours ago
M. FarooqM. Farooq
2,950316
2,950316
add a comment |
add a comment |
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$begingroup$
What alternative would you suggest ? E.g.a methane-air flame in FID would be like e.g using methylchloride as the makeup gas in ECD.
$endgroup$
– Poutnik
12 hours ago
$begingroup$
@Poutnik One alternative would be electric arc ionization. Another extreme UV. What is special about H2?
$endgroup$
– Dirk Bruere
12 hours ago
1
$begingroup$
It would be even much worse than methane. The key is to keep as low baseline ionisation as possible. That does not happen with methane flame and definitely not with arc or UV ionisation. With the arc, there would be additionally very high noise, several orders higher than useful signal.
$endgroup$
– Poutnik
11 hours ago