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USGS-St. Petersburg Carbon Analytical Laboratory

Suggested Sampling Supplies and Procedures

Recommended procedures for collecting and storing water samples for total alkalinity and total carbon analyses are available in Dickson et al. (2007) Guide to best practices for ocean CO2 measurements.

Sampling supplies

Preparation for sampling and sampling procedure (modified from Dickson et al. 2007).

Sample bottles should be precombusted in a muffle furnace to remove organic carbon. If bottles are acid washed, all acid must be rinsed. Label sample bottles in at least two locations by writing directly on the bottle (label tape frequently falls off during sample transport). Record sample information on the sample sheet provided.

From Niskin Bottles or Flow-Through Sampling Systems

Filtering samples

When sampling in locations where high concentrations of particulates are found (for example in estuaries, reef environments, or other coastal environments), samples should be filtered to remove particulates.

References:

Dickson, A.G., Sabine, C.L., and Christian, J.R. (eds). 2007. Guide to best practices for ocean CO2 measurements. PICES special publication 3, 191 pp.
http://cdiac.ornl.gov/oceans/Handbook_2007.html

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