Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1080/10256010208033267 |
| Title (Primary) | A new approach to determining the content and 15N abundance of total dissolved nitrogen in aqueous samples: toc analyser-QMS coupling |
| Author | Russow, R.; Kupka, H.J.; Götz, A.; Apelt, B. |
| Source Titel | Isotopes in Environmental and Health Studies |
| Year | 2002 |
| Department | BOPHY |
| Volume | 38 |
| Issue | 4 |
| Page From | 215 |
| Page To | 225 |
| Language | englisch |
| Abstract | The standard method for determining the 15N abundance of total dissolved nitrogen (TDN) in aqueous samples (e.g., soil leachate, sewage, urine) is currently Kjeldahl digestion followed by steam distillation or diffusion to isolate the ammonium, and then 15N measurement using IRMS. However, this technique is both time-consuming and laborious. One way of overcoming these disadvantages could be to couple a TOC analyser to determine the TDN with a sufficient quadrupole MS to determine the 15N abundance. The highTOC analyser (Elementar Analysensysteme Hanau, Germany), which catalytically oxidises the sample's total nitrogen with a high, constant yield to nitrogen monoxide (NO), appeared particularly suitable. The quadrupole-MS ESD 100 (InProcess Instruments Bremen, Germany) proved to be a suitable mass spectrometer for the 15N determination of NO. This combination of instruments was found to provide a workable method in numerous measurements of standard and actual samples. The detection limit concerning the N amount required per analysis is 2 μg, corresponding to an N concentration of 0.7mg/l in a maximum sample volume of 3ml. Depending on the N concentration, 15N abundances starting from 0.5 at.% can be measured with the required precision of better than 3% (simple standard deviation). For example, measuring the abundance of 0.5 at.% requires about 50 μg N, whereas for 1 at.% or more only about 5 μg N is needed per analysis. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=5952 |
| Russow, R., Kupka, H.J., Götz, A., Apelt, B. (2002): A new approach to determining the content and 15N abundance of total dissolved nitrogen in aqueous samples: toc analyser-QMS coupling Isot. Environ. Health Stud. 38 (4), 215 - 225 10.1080/10256010208033267 |
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