Spectroscopy (OCR A-Level Chemistry A): Flashcards

📚Flashcards
Mass Spectrometry
Sign up to keep revising.Create a free account to study more flashcards and track your progress.

Practise the cards

10 cards from this deck

Show

Purpose of mass spectrometry

Identify organic compounds by determining molecular mass

How molecular ion (M+\text{M}^+) forms

Molecule loses one electron during ionisation

Location of M+\text{M}^+ peak in mass spectrum

Highest m/zm/z value on right side of spectrum

What M+\text{M}^+ peak reveals

Molecular mass of the compound

Cause of M+1 peak

13C^{13}\text{C} isotope present in molecule

Natural abundance of 13C^{13}\text{C}

Approximately 1.1%

Fragmentation in mass spectrometry

Molecular ions break into smaller fragment ions

What is detected after fragmentation

Positively charged fragment ions only, not radicals

Base peak definition

Tallest peak in the mass spectrum

m/zm/z value of CH3+\text{CH}_3^+ fragment

15

Join 100,000+ A-Level students studying Flashcards with us.

Select your subjects, and get access to A+ resources today.