Standardization of C14 stock solution and filter efficiency in the comparison of primary productivity measurements

Abstract

During the intercalibration trials on primary production conducted at the University of Hawaii, Honolulu, in September 1961, in which one of the authors (R. R. P.) also participated, factors influencing the variability of productivity measurements like sampling error, differential toxicity of samplers, sample treatment before incubation, inoculation, incubation, planchet preparation and counting were considered. Of these some of the factors such as sampling error and inoculation were made uniform by each group of scientists sub-sampling one and the same sample and all participants using the same CI4 stocks