| Autor: |
Alfred Golloch, E. Denkhaus, H.m. Kuss |
| Rok vydání: |
1994 |
| Předmět: |
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| Zdroj: |
Analytical and bioanalytical chemistry. 353(2) |
| ISSN: |
1618-2650 |
| Popis: |
A microwave induced plasma emission spectrometer operating at low energy (30 W) and low plasma gas pressure (2.5.10(-2) Pa) has been used for the quantitative measurement of molecular nitrogen in natural gases. The samples have been introduced into the plasma using a counterflow principle to produce emission spectra of diatomic molecular fragments in low excitation states (advantage: minimized interferences). The N(2) concentration has been determined by measuring the intensity of the N(2)-line at 337.13 nm (C(3)Pi(u)-B(3)Pi(g)-system; (0,0)vibrational transition) and of the NH-line at 336.03 nm (A(3)Pi(i)-X(2)Sigma(-)-system; (0,0)-vibrational transition). A linear correlation between concentration and signal intensities has been obtained in the range of 0.00% to 14.24% (v/v). The method possesses a detection limit of 0.01 ppm (v/v) for the determination of N(2), and a reproducibility of 1.33% (RSD). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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