U3-5-2 - Mass Spectrometry

Question 1

Parent ion

Answer 1

The molecule being analysed (in mass spec) with one electron removed (so a 1+ charge).

Question 2

How do you get the GFM from mass spec data?

Answer 2

m/z of the parent ion is equal to GFM

Question 3

Identify the parent ion peak

Answer 3

Question 4

Base peak

Answer 4

The most abundant peak (in a mass spectrum)

Question 5

Identify the base peak

Answer 5

Question 6

(Mass spec) fragment with m/z of 15

Answer 6

[CH₃]⁺

Question 7

(Mass spec) fragment with m/z of 17

Answer 7

[OH]⁺

Question 8

(Mass spec) fragment with m/z of 28

Answer 8

[C=O]⁺

Question 9

(Mass spec) fragment with m/z of 29

Answer 9

[C₂H_{<span>5</span>}]⁺

Question 10

(Mass spec) fragment with m/z of 77

Answer 10

[C₆H_{<span>5</span>}]⁺