What is the point of ionizing a sample for mass analyses? Why must the “separati

Question

What is the point of ionizing a sample for mass analyses?
Why must the “separation” chamber of a mass spectrum require evacuation?
Using the IR spectrum of atmospheric gases, which (if any) greenhouse gas protects us the most against each of these IR frequencies? You will need to convert the cm-1 to microns.
A. 3400 cm-1 -
B. 1500 cm-1 -
C. 950 cm-1 -   
Air molecules can also absorb IR radiation. How might you expect we could correct for this during our sample collection? (Hint it will require taking two IR readings).

Explanation / Answer

Answer:

On ionising the molecule will converts into its molecular ion(mass equal to molecule)with positive charge and a radical.

Seperation chamber require evacuation otherwise the ions produced are reacted with atmospheric gases,to give different m/z values than normal m/z values.

CO2 is proct us from most against from 3400,1500 and 950cm-1 freequencies.

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