Long-term storage of natural water samples for dissolved oxygen determination.
A method for preserving natural water samples for dissolved oxygen analysis is recommended. The conventional method of using greased glass stoppers have been found to cause an increase in oxygen concentration by 12% over 1-month period as a result of evaporation of water sample through micro-gaps and concurrent intrusion of air into the water sample bottles. Sealing the sample bottles with water has been found to be the optimal storage method. It permits a 100.2 +/- 0.3% recovery of dissolved oxygen concentration from storage seawater samples over 4 months.
Zhang
Jia-Zhong
JZ
Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine and Atmospheric Science, University of Miami, FL 33149, USA. jia-zhong.zhang@noaa.gov
Berberian
George
G
Wanninkhof
Rik
R
D005898:Glass; D010100:Oxygen / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D012995:Solubility; D013048:Specimen Handling / Q000379:methods*; D013997:Time Factors
D010100:Oxygen