Forensic analysis of explosives using isotope ratio mass spectrometry (IRMS) — Discrimination of ammonium nitrate sources

2009 ◽  
Vol 49 (2) ◽  
pp. 73-80 ◽  
Author(s):  
Sarah J. Benson ◽  
Christopher J. Lennard ◽  
Philip Maynard ◽  
David M. Hill ◽  
Anita S. Andrew ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Ammonium Nitrate ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Forensic Analysis ◽  
Nitrate Sources

Measurement of 15N and 18O Isotope Abundance of Nitrate Using Denitrifier Method on Tracegas-Isotope Ratio Mass Spectrometry

2013 ◽  
Vol 726-731 ◽  
pp. 1346-1349 ◽  
Author(s):  
Chun Ying Xu ◽  
Yu Zhong Li ◽  
Qiao Zhen Li ◽  
Yi Wei Dong ◽  
Fu Li Fang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Nitrate Contamination ◽  
Nitrate Sources ◽  
Trapping Time ◽  
Animal Wastewater ◽  
Denitrifier Method ◽  
Oxygen Isotopic ◽  
O Isotope

A modified denitrifier method on Tracegas-isotope ratio mass spectrometry (IRMS) was developed to determine the nitrogen and oxygen isotopic compositions of nitrate (NO3-) in water samples. The protocol presented in our previous publication was modified in several aspects. Then, the incubation time, amount of NO3-sample, and effect of trapping time in the Tracegas system were analyzed using the standard reference USGS34. Both δ15N and δ18O values demonstrated accurate and reproducible at incubation times exceeding 12 h or overnight as well as added 0.2 μg to 0.4 μg NO3--N samples. Our data also showed that 100 s for trapping time in Tracegas system was adequate to achieve accurate and reproducible results. Finally, the δ15N and δ18O values of nitrate in animal wastewater were measured using this method. The results indicate that the denitrifier method can be used widely for tracing nitrate sources and controlling nitrate contamination in China.

Forensic analysis of explosives using isotope ratio mass spectrometry (IRMS) — Preliminary study on TATP and PETN

2009 ◽  
Vol 49 (2) ◽  
pp. 81-86 ◽  
Author(s):  
Sarah J. Benson ◽  
Christopher J. Lennard ◽  
Philip Maynard ◽  
David M. Hill ◽  
Anita S. Andrew ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Forensic Analysis ◽  
Preliminary Study
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