Analytical Chemistry & Spectroscopy
8 terms
Calibration Curve
Analytical Chemistry & Spectroscopy
Various
A plot of instrument response against known analyte concentration, used to determine unknowns.
y = mx + c
Carbon-13 NMR
Analytical Chemistry & Spectroscopy
ppm
An NMR technique that detects the carbon-13 nucleus to reveal the carbon skeleton of a molecule.
δ 0–220 ppm
Chemical Shift
Analytical Chemistry & Spectroscopy
ppm
The position of an NMR signal relative to a reference, expressed in parts per million of the operating frequency.
δ = (ν_sample − ν_ref) × 10⁶ / ν_spectrometer
Chromatography
Analytical Chemistry & Spectroscopy
Dimensionless
A family of separation techniques that partition components between a stationary and a mobile phase.
Chromophore
Analytical Chemistry & Spectroscopy
nm
The part of a molecule responsible for absorbing light at a particular wavelength.
Column Chromatography
Analytical Chemistry & Spectroscopy
g
A preparative technique in which a mixture is separated by passing it down a vertical column packed with stationary phase.
Complexometric Titration
Analytical Chemistry & Spectroscopy
mol/L
A titration based on the formation of a stable complex between the analyte metal ion and a chelating titrant.
M²⁺ + EDTA⁴⁻ → [M(EDTA)]²⁻
Confidence Interval
Analytical Chemistry & Spectroscopy
Various
The range within which the true value of a measured quantity is expected to lie with a stated probability.
μ = x̄ ± ts / √n