PMID- 22468325
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20120625
LR  - 20191112
IS  - 1097-0231 (Electronic)
IS  - 0951-4198 (Linking)
VI  - 25
IP  - 24
DP  - 2011 Dec 30
TI  - Continuous analysis of delta(1)(8)O and deltaD values of water by diffusion sampling cavity 
      ring-down spectrometry: a novel sampling device for unattended field monitoring 
      of precipitation, ground and surface waters.
PG  - 3706-12
AB  - A novel sampling device suitable for continuous, unattended field monitoring of 
      rapid isotopic changes in environmental waters is described. The device utilises 
      diffusion through porous PTFE tubing to deliver water vapour continuously from a 
      liquid water source for analysis of delta(1)(8)O and deltaD values by Cavity Ring-Down 
      Spectrometry (CRDS). Separation of the analysed water vapour from non-volatile 
      dissolved and particulate contaminants in the liquid sample minimises spectral 
      interferences associated with CRDS analyses of many aqueous samples. Comparison 
      of isotopic data for a range of water samples analysed by Diffusion Sampling-CRDS 
      (DS-CRDS) and Isotope Ratio Mass Spectrometry (IRMS) shows significant linear 
      correlations between the two methods allowing for accurate standardisation of 
      DS-CRDS data. The internal precision for an integration period of 3 min (standard 
      deviation (SD) = 0.1 per thousand and 0.3 per thousand for delta(1)(8)O and deltaD values, respectively) is similar 
      to analysis of water by CRDS using an autosampler to inject and evaporate 
      discrete water samples. The isotopic effects of variable air temperature, water 
      vapour concentration, water pumping rate and dissolved organic content were found 
      to be either negligible or correctable by analysis of water standards. The 
      DS-CRDS system was used to analyse the O and H isotope composition in short-lived 
      rain events. Other applications where finely time resolved water isotope data may 
      be of benefit include recharge/discharge in groundwater/river systems and 
      infiltration-related changes in cave drip water.
FAU - Munksgaard, Niels C
AU  - Munksgaard NC
AD  - James Cook University, Earth and Environmental Sciences, Cairns, Queensland, 
      Australia. niels.munksgaard@jcu.edu.au
FAU - Wurster, Chris M
AU  - Wurster CM
FAU - Bird, Michael I
AU  - Bird MI
LA  - eng
PT  - Journal Article
PL  - England
TA  - Rapid Commun Mass Spectrom
JT  - Rapid communications in mass spectrometry : RCM
JID - 8802365
EDAT- 2012/04/04 06:00
MHDA- 2012/04/04 06:01
CRDT- 2012/04/04 06:00
PHST- 2012/04/04 06:00 [entrez]
PHST- 2012/04/04 06:00 [pubmed]
PHST- 2012/04/04 06:01 [medline]
AID - 10.1002/rcm.5282 [doi]
PST - ppublish
SO  - Rapid Commun Mass Spectrom. 2011 Dec 30;25(24):3706-12. doi: 10.1002/rcm.5282.