Sample Requirements for Dissolved Halogens

Analysis Amount Precision
δ37Cl >3 mg Cl- σ = 0.1 ‰ SMOC
δ81Br >3 mg Br- σ = 0.1 ‰ SMOB

View more information about aqueous halogen samples.

Sample Requirements for Dissolved Nitrate/Ammonia

Analysis Amount Precision
δ18O/δ15N (NO3) 30ml/0.5mg N 2σ = 1.0 ‰ VSMOW/0.5 ‰ Air-N2
δ15N (NH4) 5 mg N 2σ = 0.5 ‰ Air-N2

​View more information about aqueous nitrate or ammonia samples.

Sample Requirements for Dissolved Sulphate

Analysis Amount Precision
δ34S >5 mg SO4 2σ = 0.3 ‰ VCDT
δ18O >5 mg SO4 2σ = 0.3 ‰ VSMOW

​View more information about aqueous sulphate samples.

Sample Requirements for Dissolved Carbon

Analysis Amount Precision
δ13C (DIC) >5 µg C 2σ = 0.2 ‰ VPDB
δ13C (DOC) >40 µg C 2σ = 0.2 ‰ VPDB
14C/13C >3 mg C 2σ = ~0.3 pMC

​View more information about aqueous carbon samples.

Sample Requirements for Dissolved Strontium

Analysis Amount Precision
87Sr/86Sr >10 µg Sr = 0.00002

​View more information about aqueous strontium samples.

Sample Requirements for Dissolved Methane

Analysis Amount Precision
δ13C >1 nmol 2σ = 0.2 ‰ VPDB
δ2H >2 nmol 2σ = 5 ‰ VSMOW

Note: preservation and refrigeration is extremely important when sampling for low level methane analysis.
View more information about aqueous methane samples.

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