Analytical Chemistry & Spectroscopy
60 terms · page 2 of 3
High-Resolution Mass Spectrometry
Mass spectrometry capable of measuring mass to four or more decimal places, allowing molecular formulae to be determined.
Analytical Chemistry & SpectroscopyInductively Coupled Plasma Mass Spectrometry
A technique combining a plasma ion source with a mass spectrometer for ultra-trace multi-element analysis.
Analytical Chemistry & SpectroscopyInfrared Spectroscopy
A technique that identifies functional groups from the infrared frequencies a molecule absorbs as its bonds vibrate.
Analytical Chemistry & SpectroscopyIntegration in NMR
The measurement of the area under each NMR signal, which is proportional to the number of nuclei giving rise to it.
Analytical Chemistry & SpectroscopyIodometry
A redox titration in which iodine liberated by the analyte is titrated with standard thiosulfate.
Analytical Chemistry & SpectroscopyIsotopic Peak
A peak appearing at a higher mass than the main ion because the molecule contains a heavier isotope.
Analytical Chemistry & SpectroscopyLimit of Detection
The smallest concentration of analyte that can be reliably distinguished from the blank.
Analytical Chemistry & SpectroscopyLimit of Quantitation
The lowest concentration at which the analyte can be measured with acceptable precision and accuracy.
Analytical Chemistry & SpectroscopyMass Spectrometry
A technique that separates ionised molecules and fragments according to their mass-to-charge ratio.
Analytical Chemistry & SpectroscopyMatrix
Everything in a sample other than the analyte itself.
Analytical Chemistry & SpectroscopyMobile Phase
The fluid that carries the sample through the stationary phase during chromatography.
Analytical Chemistry & SpectroscopyMolar Absorptivity
The absorbance of a one molar solution measured over a one centimetre path length.
Analytical Chemistry & SpectroscopyMolecular Ion Peak
The peak in a mass spectrum corresponding to the intact molecule after loss of a single electron.
Analytical Chemistry & SpectroscopyNuclear Magnetic Resonance Spectroscopy
A technique that probes molecular structure using the resonance of atomic nuclei in a strong magnetic field.
Analytical Chemistry & SpectroscopyOutlier Test
A statistical procedure for deciding whether a suspect result differs enough from the others to be rejected.
Analytical Chemistry & SpectroscopyPrecipitation Titration
A titration in which the analyte and titrant combine to form an insoluble product.
Analytical Chemistry & SpectroscopyPrimary Standard
A highly pure, stable substance that can be weighed accurately and used directly to prepare a solution of known concentration.
Analytical Chemistry & SpectroscopyQualitative Analysis
Analysis carried out to establish which species are present in a sample.
Analytical Chemistry & SpectroscopyQuantitative Analysis
Analysis carried out to determine the amount or concentration of a species in a sample.
Analytical Chemistry & SpectroscopyRaman Spectroscopy
A vibrational technique based on the small shift in frequency of light scattered inelastically by molecules.
Analytical Chemistry & SpectroscopyRandom Error
An error that varies unpredictably in size and direction between repeated measurements.
Analytical Chemistry & SpectroscopyRedox Titration
A titration in which the reaction between titrant and analyte involves electron transfer.
Analytical Chemistry & SpectroscopyRetention Factor
The ratio of the distance travelled by a component to the distance travelled by the solvent front.
Analytical Chemistry & SpectroscopySampling
The process of selecting a small portion of material that genuinely represents the bulk being analysed.