Zine-65 and DDT Residues in Albacore Tuna off Oregon in I969

摘要

The nature and magnitude of experimental errors due to 65Zn adsorption on Inorganic surfaces were examined in a laboratory system designed to measure 65Zn uptake by marine phytoplankton. In the pH range, 6.3 to 7.5, a precipitate formed in the algal nutrient medium and accumulated up to 70％ of the 65Zn in the medium within 24 hours. It was concluded that 6SZn adsorption by undetected precipitates could result in serious errors in measurements of S5Zn uptake by marine phytoplankton.nThe relationship between the percent adsorption of 65Zn in the contained sample and wetted glass surface area/pipette sample volume was shown to be linear for volumetric pipettes of 1-15 ml.