CRM
Definition
Certified reference material. A matrix-matched material of known composition (NIST SRM 955c lead in caprine blood, SRM 1577c bovine liver) used to verify accuracy in every batch.
Related terms
- AAS
- Atomic absorption spectrometry. Free ground-state atoms in a vapour absorb a characteristic resonance wavelength from a hollow-cathode lamp, and Beer-Lambert converts the...
- GFAAS
- Graphite-furnace AAS, also called electrothermal AAS. A graphite tube heated electrically through a programmed ramp atomises a microlitre aliquot, giving roughly 100...
- ICP-MS
- Inductively coupled plasma mass spectrometry: the laboratory reference method for trace element quantification in food matrices. Uses high-temperature argon plasma to atomise...
- ICP-OES
- Inductively coupled plasma optical emission spectrometry: the plasma excites atoms which emit element-specific wavelengths of light on returning to ground state; suited...
- Ion Chromatography
- Ion-exchange separation with conductivity detection after a suppressor, used to quantitate inorganic anions and cations such as fluoride, oxalate, sodium and calcium.
Explained in
- Inorganic Poison Analysis: AAS, ICP-OES, ICP-MS and Ion ChromatographyCertified reference material. A matrix-matched material of known composition (NIST SRM 955c lead in caprine blood, SRM 1577c bovine liver) used to verify accur...