Concept
Tekran 2500 CVAFS mercury detector
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1089/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | Tekran 2500 fluorescence mercury detector | ||
| Definition | A cold vapour atomic fluorescent spectrophotometer (CVAFS) used for quantitative determination of volatile heavy metals, such as mercury. It is used for total and speciated mercury analysis in university, government and commercial laboratories. It makes use of the characteristic of mercury that allows vapour measurement at room temperature. Mercury atoms in an inert carrier gas are excited by a collimated UV light source at a particular wavelength. As the atoms return to their non-excited state they re-radiate their absorbed energy at the same wavelength. The fluorescence may be detected using a photomultiplier tube or UV photodiode. The system is available with either an adjustable ball flow meter or precision mass flow meter (MFM). The latter option allows remote control and readout of the carrier flow rate and is used in applications where precise gas flow is necessary, such as configurations that include gas chromatography. The detector can be used with any analytical system capable of producing mercury vapour in an inert gas stream. It has an absolute detection limit of less than 0.1 picograms of mercury. | ||
| Date | 2016-11-15T16:57:37 | ||
| Identifier | SDN:L22::TOOL1089 | ||
| Note | accepted | ||
| Is Version Of | TOOL1089 | ||
| version | 1 | ||
| Broader | L05:LAB49 |
Atomic fluorescence spectrometers | |
| Related | B75:ORG01032 |
Tekran Instruments Corporation | |
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