An investigation of the marine geochemistry of gold

摘要: Abstract : An analytical method has been developed for the analysis of gold (Au) in seawater and was applied to a suite samples order conduct preliminary assessment marine geochemical behavior Au. The involved preconcentration by anion exchange Au complexed with cyanide ion detection flow injection-inductively coupled plasma quadrupole mass spectrometry (FI-ICPMS). aliquot radiotracer added each sample monitor recoveries. Analysis FI-ICPMS resulted practical limit, expressed as concentration seawater, about 10 fmol/liter four liter preconcentrate. Corrections stable that contributed reagents were significant, constituting up 60% overall signals measured. Reproducibility, based analyses five four-liter Mediterranean obtained from single 30- Niskin bottle, 15% at 140 level. Gold profiles Atlantic Gulf Stream, Northeast Pacific, Black Seas hydrothermal fluids 21 N, on East Pacific Rise analyzed. In general, concentrations are nearly three orders magnitude less than reported literature prior 1988. is non- conservative element seawater. It does not appear undergo appreciable recycling water column under oxic conditions evidenced its fairly homogeneous distribution over similar average values Atlantic.