Concept
Plymouth Marine Laboratory [custom] waveguide nutrient analyser
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1716/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | PML waveguide analyser | ||
| Definition | A custom-made segmented flow colorimetric analytical system designed to measure nanomolar concentrations of nitrate, nitrite and phosphate in water. It was designed and built by Malcolm Woodward at Plymouth Marine Laboratory, and is based on the methodology of Woodward and Rees (2001). It is a hybrid system; the fiber optic light source (FO-6000) and liquid waveguide flow cells are designed by World Precision Instruments (WPI), and the detector is home-manufactured at PML. The light source is passed through a filter at the required wavelength for the detection of colours formed during chemical segmented flow reactions. The light then passes through the waveguide via fiber optic cables, and then through the water sample. The output wavelength of light is detected, and then monitored on either a computer or chart recorder to determine the nutrient concentrations within the samples. Nitrate and nitrite are measured at 540 nm and phosphate at 710 nm. The system has a detection limit of 0.5 nanomoles/litre for nitrate and 1 nanomole/litre for nitrite and phosphate. | ||
| Date | 2021-07-15T10:42:39 | ||
| Identifier | SDN:L22::TOOL1716 | ||
| Note | accepted | ||
| Is Version Of | TOOL1716 | ||
| version | 1 | ||
| Broader | |||
| L05 SeaDataNet device categories - (3) | |||
| Related | B75:ORG00023 |
Plymouth Marine Laboratory | |
L35:MAN0184 |
Plymouth Marine Laboratory | ||
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