Mark each of the statement T for true or F for false:___Flame ionization detecto
ID: 1018905 • Letter: M
Question
Mark each of the statement T for true or F for false:___Flame ionization detectors work only for analytes that are flammable.___Electroosmotic flow always occurs toward the cathode.___In capillary electrophoresis, cations and anions typically flow in opposite directions.___Isoelectric focusing separates molecules on the basis of their PI values.___In normal-phase chromatography, the largest molecules elute first.___All ions with a charge of + 1 accelerated across 1000 Volts will have the same velocity.___the m/z value passed by a quadrupole mass filter is scanned by changing the frequency applied to the quadrupole rods.___the m/z value passed by a quadrupole mass filter is scanned by changing the frequency applied to the quadrupole rods.___Electron Impact ionization is more likely to produce a molecular (parent) ion than Chemical Ionization.___MALDI is a type of mass analyzer that uses a magnetic field to disperse ions of different mass.Explanation / Answer
Flame ionization detectors is able to detect only organic compounds as most of them are flamable. It is unable to detect inorganic compounds.
Flame ionization detectors work only for analytes that are flammable - True
Q.2: Electroosmotic flow always occur towards the cathode - True
Q.3: Capillary electrophoresis cations and anions typically move in opposite direction - True.
Q.4: Isoelectric focusing is a technique developed to separate different species on the basis of their difference in isoelectric point(pI) values. Hence
Isoelectric focusing separates molecules on the basis of their pI values - True.
Q.5:
Q.6:The formulse for the accleration of a charged particle in uniform electric field is, a = qE / m
Since accleration (and hence velocity) also depends on mass of the charged particle along with charged, the velocity will not be uniform for all ions.
Hence the statement is false.
Q.7: The m/z value passed by a Quadrupole mass filter is scanned by changing the frequency applied to the quadrupole rods - True
Q.8: Electron impact ionization is more likely to produce a molecular(parent) ion than chemical ionization - True.
Q.9: False
Q.10: Retention time increases with increasing polarity of the solvent. Hence this statement is true
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