Chemistry A-Level
comparison with a database
What comparison with a database means in Chemistry A-Level, as defined for AQA.
Definition of comparison with a database
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Reference: AQA
The spectrum of the unknown is compared with spectra of known compounds held in a database, and a match across the fingerprint region identifies the compound.
Topics that use comparison with a database
- Infrared spectroscopy (AQA A-Level)
Related terms
- absence as evidence
- below 1500 cm⁻¹
- bond vibration
- broad O–H shapes
- C=O near 1700 cm⁻¹
- characteristic wavenumbers
- fingerprint region
- units of cm⁻¹
Using comparison with a database in the exam
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