- Continuous flow system for the detection and analysis of inorganic nitrogen in aqueous solutions.
- Ultra-sensitive ammonia detection down to the ppb level is easily achievable with a cycle time of 1.5-2.5 minute per sample.
- The optional activated zinc reduction cartridge allows for the analysis of nitrate in addition to ammonia.
- Patented gas diffusion / conductivity principle provides results unaffected by sample turbidity or color.
- Low maintenance sample introduction via peristaltic pump.
- Soil and Plant Tissue Extracts
- Wastewater (EPA Approved Method for Clean Water Act Applications)
- Kjeldahl Digestates (no distillation step required)
- Manure Samples
- Drinking Water
- Urea Analysis via conversion with urease
Software & Automated Operation
- Built in Windows 10 computer
- Software runs on Microsoft Windows 7 operating system or higher
- Easy connection to networks, printers, or external USB drives
- The TL-2800 is typically paired with an autosampler to facilitate automated operation. Three autosampler options are available to accommodate a wide range of sample volumes.
Principle of Operation
The Timberline TL-2800 Ammonia Analyzer is based on the principle of gas diffusion across a membrane coupled with electrical conductivity measurement as first described by Carlson.1 The peristaltic pump directs the sample, caustic, and absorbing solutions into the diffusion membrane cell where the sample is mixed with the caustic. The resulting solution has a pH sufficiently high (pH 11-13) to convert virtually all the ammonium ion present in the sample to dissolved ammonia gas. The dissolved ammonia gas in the sample / caustic mixture diffuses across the hydrophobic membrane where it is absorbed by a buffered solution flowing on the inside. The buffered solution then flows into the conductivity detector. The change in electrical conductance of the absorbing solution is proportional to the concentration of ammonium in the original sample. Passing the sample/caustic mixture through an optional zinc reduction cartridge reduces nitrate and nitrite ions to ammonium, allowing measurement of the total inorganic nitrogen concentration.2