Abstract
A rapid method using an ICP emission spectrophotometer with simple pretreatments was applied to determine the boron content of surface seawater samples collected (1) in the northwest part of the Pacific Ocean and (2) at the coast of Satsuma Iwo-jima; the results were 4.6±0.2μg/ml for both samples. The boron content of sample (1) was also determined more precisely as 4.66±0.02μg/ml by the isotope dilution method. The chlorosity of this sample was 19.85g/l, which corresponds to 35 % salinity. Determinations of boron isotopic ratios (11B/10B) were carried out on the two seawater samples. Their ratios were 4.200 and 4.207, respectively, showing a good agreement within an error of 0.2%.
