Question
Q1. In a time of flight mass spectrometer molecule X is ionised using electrospray ionisation. What is the equation for this ionisation? A X(I)+e^-arrow X^+(g)+2e^- square B X(g)+e^-arrow X^+(g)+2e^- square C X(I)+H^+arrow XH^+(g) square D X(g)+H^+arrow XH^+(g) square
Answer
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Heledd
Professional · Tutor for 6 years
Answer
DThe option that correctly shows the ionization process with electrospray ionization in a time of flight mass spectrometer is D \( X(g)+H^+ \rightarrow XH^{+}(g) \).
Explanation
## Step 1: Define the electrospray ionisation processElectrospray ionisation is a technique used in mass spectrometry to ionise a molecule. The reaction involves adding a proton (H+) to the analyte.## Step 2: Evaluate option COption C \( X(I)+H^+ \rightarrow XH^{+}(g) \) shows an atom X in the state of iodine (I) getting ionized by adding a proton (H+), and then forming an ionised hydrogen molecule in gaseous state. However, it is a mistake because X should be in gaseous state (as the process we are analyzing takes place within a mass spectrometer).## Step 3: Evaluate option D.Option D \( X(g)+H^+ \rightarrow XH^{+}(g) \) shows a gaseous X atom getting ionised by adding a hydrogen proton (H+), and then forming an ionised hydrogen molecule in gaseous state. This is the correct representation of an electrospray ionization process.