Chemistry A-Level
comparison with standards
What comparison with standards means in Chemistry A-Level, as defined for AQA.
Definition of comparison with standards
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Reference: AQA
Running a known sample alongside on the same plate, because an Rf value is only fixed for a given solvent and stationary phase.
Topics that use comparison with standards
- Proteins (A-level only) (AQA A-Level)
Related terms
- building peptides
- condensation
- hydrogen bonding
- hydrolysis of the peptide link
- hydrolysis products
- identifying protein structure
- mobile phase
- product form and pH
Using comparison with standards in the exam
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