Dear ecologgers, I am the midst of collecting water samples from ponds and would like to know if there is an acceptable long-term storage method for the samples. I would like to assay total nitrogen, phosphorous, DOM, lignins, phenolics and lipid content. My thought was to acidify the solution to ~pH 2 and freeze at -20 C. However, this is a solution recommended for only a month (and only for some of the chemical assays), and I want to preserve the samples a maximum of three months. Can anyone suggest a good preservation method?
Thank you, Aaron Stoler Department of Biology University of Pittsburgh Pittsburgh PA 15260 Phone: 410.365.7700 [EMAIL PROTECTED]
