The need of trace nitrogen in argon or helium analysis in the industry is not something new. Many instruments have been and still are on the market to achieve such measurement for different type of applications. The most popular use is without any doubt in air separation industry for the production of argon.The demand and the production of gas more and more pure require good analytical instrumentations. It is even more the case for the measurement of nitrogen. Small leakage, dead volume, change in temperature, bad accuracy, etc can all cause big headaches. In this document, information about the design of the LDetek LD8000 trace nitrogen in argon or helium analyzer will be described to explain how we achieve such good performance. Those results are also described to show that the LD8000 is now the solution for any applications that require such measurement.
Analyzer Components Plasma Emission Detector (PED) Detection principle The LD8000 is using a Plasma Emission Detector where the principle is based on a spectroscopic emission cell. This is actually not a new technique, but the unique design of LDetek in terms of frequency, intensity as well as the mechanical and electrodes conception make the system very stable and efficient.A luminous phenomenon, called electroluminescence, is created and is used as emission technique to quantify the nitrogen analyte. A plasma is created with the argon or helium flowing in the cell and when concentration of nitrogen changes, spectral lines emission change as well. The light is then directed in an optical filter that will discriminate the spectral lines. At the end, a photo-diode will convert light to current to make a proportional electric signal of nitrogen in the sample. With its unique design, LDetek achieves unsurpassed performance that provides now a reference trace nitrogen in argon or helium analyzer.
