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Analytical Chemistry & Spectroscopy

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Analytical Chemistry & Spectroscopy

Inductively Coupled Plasma Mass Spectrometry

A technique combining a plasma ion source with a mass spectrometer for ultra-trace multi-element analysis.

ppb
Analytical Chemistry & Spectroscopy

Infrared Spectroscopy

A technique that identifies functional groups from the infrared frequencies a molecule absorbs as its bonds vibrate.

ν̃ = (1/2πc)√(k/μ) cm⁻¹
Analytical Chemistry & Spectroscopy

Integration in NMR

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 Dimensionless
Analytical Chemistry & Spectroscopy

Iodometry

A redox titration in which iodine liberated by the analyte is titrated with standard thiosulfate.

I₂ + 2S₂O₃²⁻ → 2I⁻ + S₄O₆²⁻ mol/L
Analytical Chemistry & Spectroscopy

Isotopic Peak

A peak appearing at a higher mass than the main ion because the molecule contains a heavier isotope.

M+1, M+2 Da