| Autor: |
Anderson, David J., Higgins, Jonathan V., Bloem, Thomas B. |
| Zdroj: |
Journal of Great Lakes Research; 1998, Vol. 24 Issue 4, p838, 0p |
| Abstrakt: |
A procedure for determining particulate-phase organic carbon (POC) in water was developed and applied to the analysis of samples from theLaurentian Great Lakes of North America. Water samples were filteredthrough 0.7 micro M pore-size glass fiber filters which were sub-sampled to introduce measurable quantities of particulate matter into a Carlo Erba EA-1108 elemental analyzer. The sub-sampling technique allowed quick filtration of water samples, typically 1 to 4 liters for open-lake locations, using 47 mm diameter filters while meeting the small size requirement of the combustion chamber. The detection limit of the instantaneous combustion procedure was 2.9 micro g of carbon per sub-sample, which translates to 28 micro g/L POC for a sample volume of 1 liter. The precision of the sub-samples averaged 6.2% coefficient of variation (CV), which was comparable to the precision of replicate water samples (6.6% CV). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
