Total N is measured in the same device with UV digestion + UV reduction for Total Nitrogen. Colorimetric, acidic digestion and UV Digestion is used for Total Phosphorus.
On-line Analyser Total Nitrogen & Total Phosphorus
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Applications
On-line monitoring of run-off organics
After a prolonged dry period, heavy rainfall in a catchment area can yield unacceptably high levels of organics and toxic analytes in a river system flash flood. Water-treatment plants that process this raw water with high agricultural analytes, then have flocculants...
Safe digestion of Sulphide Ores
The digestion of sulphide ores for analysis by AAS ,ICP or ICP-MS creates two potential problems. 1. Sulphide ores can contain silicates which are difficult to digest by aqua regia and require use of HF which requires special handling and safety...
What is an Atomic Absorption Spectrophotometer (AAS)
History of the AAS In 1940 Alan Walsh was a young physicist working at the British Non Ferrous Metals Laboratories during World War II. His work included determination of metal composition from the debris of enemy bombers. He developed a number of methods for rapid...
Spectrometers: Emission vs. Absorption Instruments
For analytical spectroscopy, there are two main categories of instruments – based on either atomic absorption or atomic emission. An example of an instrument using atomic emission is an Inductively Coupled Plasma (ICP) Spectrometer, whilst an example of one...
Remote Measurements
The Alec range of equipment can be either powered by on board lithium battery or cabled power. The battery option means that difficult measuring locations such as tidal flow past reef atolls can be measured by merely anchoring the instrument against the coral. Most...
What is Zeta Potential?
Zeta potential indicates the stability of a colloidal dispersion. A colloid is a particle, 10-8 to 10-6m in size which when mixed in a dispersing medium is termed a colloidal dispersion. Aerosols (solid or liquid colloids) in a gas (dispersing medium), emulsions...
Digestion of Volatile Metals in memory-free Digestion Vessels
Various Microwave Digestion Vessels have a history of accumulating volatile metals on the surface of the vessel with repeated microwave digestions. Quartz lined vessels are one such surface that needs special preparation to try and remove such accumulations. A special...
What is a monochromator? Resolution versus sensitivity.
A typical spectrometer will process wavelength spectra to provide some measure of the analytical makeup of a sample. Within that spectrometer will be some separating device such as a monochromator or polychromator to measure the strength of the wavelength of...
Microwave Vessel Age
With the continued use of conventional microwave vessels, the vessel and sub components quality, will progressively degrade with aggressive acid attack and need to be replaced. TFM-PTFE has demonstrated a superior resistance to strong acid attack allowing aging...
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