English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse
  1. Search Results / 
  2. Item Summary

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary
 PreviousNext  

Released
Journal Article

Cryoflow: Cryofocusing nanomole amounts of CO2, N2, and SO2 from an elemental analyzer for stable isotopic analysis

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Fry, B., Ganitt, R., Tholke, K., Neill, C., Michener, R. H., Mersch, F. J., et al. (1996). Cryoflow: Cryofocusing nanomole amounts of CO2, N2, and SO2 from an elemental analyzer for stable isotopic analysis. Rapid Communications in Mass Spectrometry, 10(8), 953-958. doi:10.1002/(SICI)1097-0231(19960610)10:8<953:AID-RCM534>3.0.CO;2-0.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-4449-F
Abstract
A manual "cryoflow' system is described for measuring C, N and S isotopic compositions of small gas samples in the 10–1000 nmol range. Using a continuous flow system with helium as the carrier gas, sample gases are injected or produced via combustion in an elemental analyzer, purified, separated and collected in separate traps with cryogens, then degassed into a slowly flowing helium stream (1–4 mL/min) for measurement with an isotope rato mass spectrometer. Blanks associated with combustion of organics in an elemental analyzer were 5–20 nmol for N and C, and not detectable for S, so that samples of >50 nmol C, N or S could be routinely analyzed with a precision of better than 0.3‰ after blank correction. In some cases, slow degassing of sample gases from traps over several minutes gave broad, low-amplitude peaks that yielded high-precision measurements (e.g., <0.05‰ δ13C differences between replicates). Work with this manual prototype showed that it is possible to routinely obtain high precision isotope measurements for C, N and S isotopes from the same small sample.