Chemistry A-Level
independence of field strength
What independence of field strength means in Chemistry A-Level, as defined for AQA.
Definition of independence of field strength
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Reference: AQA
Dividing by the operating frequency makes delta a ratio, so a sample run on a low-field machine gives the same delta values as one run at high field.
Topics that use independence of field strength
- Nuclear magnetic resonance spectroscopy (A-level only) (AQA A-Level)
Related terms
- assignment from the Data Booklet
- electron-withdrawing neighbours
- from evidence to structure
- integration ratios
- shielding and deshielding
- the n+1 rule
- carbon environments
- combining techniques
Using independence of field strength in the exam
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