ConceptConceptDocsDocuments

Edexcel IAL Chemistry HPLC and GC

Practise Edexcel IAL Chemistry HPLC and GC through retention times, chromatogram peaks, carrier gases, column phases and mass spectrometry links.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
A2

Exam points

  • Interpret HPLC or GC chromatograms using retention time, peak area and time-versus-absorption axes.
  • Explain separation by mobile and stationary phases, linking stronger column attraction to longer retention time.
  • Recognise carrier gases and GC/HPLC with mass spectrometry for drug testing, forensics or compound identification.

15.23—High-performance liquid chromatography, HPLC, and gas chromatography, GC, are types of column chromatography that separate question 1

[Maximum number: 2]

High-performance liquid chromatography (HPLC) is used to separate a mixture into its three components.

The resulting chromatogram is shown.

Figure for Question 15.23—High-performance liquid chromatography, HPLC, and gas chromatography, GC, are types of column chromatography that separate question 1 — Edexcel A-Level Chemistry A2

Question (a)

(a)

Which is correct for the labels on the axes?
□ A
□ B
□ C
□ D

Table for Question (a) — Edexcel A-Level Chemistry A2
[ 1 ]

Question (b)

(b)

Which is correct for the components E, F and G?

Figure for Question (b) — Edexcel A-Level Chemistry A2
A

E most attracted to stationary phase; E most abundant

B

G most attracted to stationary phase; E most abundant

C

E most attracted to stationary phase; F most abundant

D

G most attracted to stationary phase; F most abundant

[ 1 ]
All question bank results loaded