Analytical Chemistry & Spectroscopy
5 terms
Inductively Coupled Plasma Mass Spectrometry
Analytical Chemistry & Spectroscopy
ppb
A technique combining a plasma ion source with a mass spectrometer for ultra-trace multi-element analysis.
Infrared Spectroscopy
Analytical Chemistry & Spectroscopy
cm⁻¹
A technique that identifies functional groups from the infrared frequencies a molecule absorbs as its bonds vibrate.
ν̃ = (1/2πc)√(k/μ)
Integration in NMR
Analytical Chemistry & Spectroscopy
Dimensionless
The measurement of the area under each NMR signal, which is proportional to the number of nuclei giving rise to it.
area ∝ number of nuclei
Iodometry
Analytical Chemistry & Spectroscopy
mol/L
A redox titration in which iodine liberated by the analyte is titrated with standard thiosulfate.
I₂ + 2S₂O₃²⁻ → 2I⁻ + S₄O₆²⁻
Isotopic Peak
Analytical Chemistry & Spectroscopy
Da
A peak appearing at a higher mass than the main ion because the molecule contains a heavier isotope.
M+1, M+2