Supplied Units:
micromoles carbon per liter (uM/L)
Description:
The minimum value of dissolved organic carbon (DOC) concentrations. Analytical precision is roughly 1 micromoles carbon per liter, but the data are provided as a range here. The concentrations of the reference waters are determined by a group of expert laboratories, so it is their range of results that we report. There is not an analytical method and result that is certifiable to a NIST standard, hence the need for the consensus values provided to the user community.