Total organic carbon and total nitrogen analyzer features high sensitivity
The Torch Combustion instrument from Teledyne Tekmar (Mason, OH) uses static pressure concentration to analyze total organic carbon and total nitrogen. Unlike a flow-through cell, the device’s detector outlet remains closed until all combusted carbon dioxide is in the detector. This technique provides a sensitive analysis because all carbon dioxide is read at once, says Tom Hartlein, the company’s product-line manager.
If a sample falls outside the instrument’s calibration range, an Intellidilution feature automatically dilutes the sample according to an algorithm to bring it within the calibration range. In addition, the machine automatically takes aliquots or dilutes from stock standards to generate calibration ranges. This feature reduces labor and removes the opportunity for human error.
The instrument’s software maintains sample logs and includes a leak-checking process. Operators can use the software to change flow and set the required pressures, thus improving test results’ reproducibility.