Reduction of Argon Consumption to Less than 2 L min(-1) by Gas Recycling in Inductively Coupled Plasma Optical Emission Spectrometry
| Autor: | Matthias Wolfgang, Paul Tirk, Helmar Wiltsche |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Detection limit
Torch Argon Chemistry 010401 analytical chemistry Analytical chemistry chemistry.chemical_element Rotational temperature 02 engineering and technology Plasma 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry law.invention law Inductively coupled plasma atomic emission spectroscopy Inductively coupled plasma Atomic physics 0210 nano-technology Excitation |
| Zdroj: | Analytical chemistry. 88(14) |
| ISSN: | 1520-6882 |
| Popis: | An innovative interface between the torch and the entrance optics for inductively coupled plasma optical emission spectrometry (ICP-OES) is proposed. This system is capable of collecting all argon which was initially supplied to the torch, cooling and cleaning it and feeding most of the argon back to the outer gas port of the torch. Thereby, the total argon consumption could be reduced from 14 to 1.4 L min(-1) using a standard torch and without restricting the rf power. The excitation- and rotational temperature of the plasma were identical when comparing the traditional setup with the enclosed plasma interface. However, the limits of detection (LOD) and limits of quantification (LOQ) of 27 elements investigated were degraded about 5-fold, though this fact can be expected to stem from a change of the observed zone in the plasma caused by the slight overpressure of 2000 Pa within the interface. Though the enclosed plasma interface was located close to the load coil, the rf power coupled to the interface was well below 1 W and no rf arcing was observed for two different rf generator designs. |
| Databáze: | OpenAIRE |
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