Determination of sub-nanogram amounts of silver in rain water by stable isotope dilution
Methods for the collection of rainwater and its analysis for silver were developed In connection with Agi cloud-seeding programs In Kansas. 109Ag tracer Is added in the field and Ag Is removed by electrodeposltlon without processing or preconcentration for mass spectrometrlc analysis. Tests indicate that accuracy is about ±6% for concentrations of 0.10 ng/g or greater. Absolute errors averaging ±0.007 ng/g for solutions containing 0.01 ng/g Ag indicate that the method is probably limited by contamination or absorptive effects in the collecting bottles. Data for Ag concentration in Kansas rainwater over a two-year period are given.
Bickford, M. E.; Silka, Lyle R.; Shuster, Robert Duncan; Angino, Earnest E.; and Ragsdale, Charles R., "Determination of sub-nanogram amounts of silver in rain water by stable isotope dilution" (1978). Geography and Geology Faculty Publications. 50.