Direct determination of barium in Sea water by inductively coupled plasma emission spectrometry

Abstract

Abstract:A method for the determination of barium in sea water was investigated using inductively coupled plasma emission spectrometry, and sea water samples from the Japan Sea and the Pacific Ocean were directly analyzed by this method. Artificial sea water was used to prepare matrix matched standard solutions to overcome the problem of physical interference. The detection limit (signal/noise ratio = 2) for barium in deionized and distilled water was 0.08/~g1-1 and in sea water, 0.12 /Lg1-1. The reproducibilities in the purified water and in the sea water at the 10#g1-1 level were 0.7% and 0.5°//o, respectively. The barium concentration in both the Japan Sea and the Pacific Ocean increased with deptll and ranged between 5.5-10.0pg1-1 and 4.1-18.4ggI -~, respectively.

δ 18Osw estimate for Globigerinoides ruber from core-top sediments in the East China Sea

“…Based on our preliminary [Ba 2+ ] data in the ECS measured by an isotope dilution method (Klinkhammer and Chan 1990), the surface water at SSW8 (30.80 salinity) showed a high [Ba 2+ ] of 57.0 nmol L −1 (Ba/Ca ratio of 6.31 μmol mol −1 ), and the Kuroshio surface water (SSW14-17, average 34.2) showed a low [Ba 2+ ] of 32.9 nmol L −1 (Ba/Ca of 3.27 μmol mol −1 ). The [Ba 2+ ] data for the Kuroshio water were consistent with previously reported data from Kuroshio waters (29.9-33.5 nmol L −1 ) (Sugiyama et al 1984). Other surface samples from the northern Okinawa Trough fall within these [Ba 2+ ] and Ba/Ca ranges, showing a linear relationship between Ba/Ca seawater and salinity (Horikawa et al, personal communication).…”

Specifically colorimetric recognition of calcium, strontium, and barium ions using 2-mercaptosuccinic acid-functionalized gold nanoparticles and its use in reliable detection of calcium ion in water

“…Until now, while there are many plasmonic NPs-based colorimetric sensors for alkaline and heavy metal ions, little attention has been paid to alkaline earth metal ions, especially Ca 2+ , Sr 2+ , and Ba 2+ ions, whose biological functions are also important. Several techniques are available to estimate those IIA group cations of the periodic table, including atomic spectroscopy, 13 fluorescent organic indicators, 14 the use of ion-selective electrodes, 15 and ion chromatography. 16 However, disagreeable drawbacks are lying behind these methodologies, such as the dependence upon expensive and specialized instruments, the toxic synthetic procedures for ionophores or fluorophores, or a rather high limit of detection.…”

Method for the preparation of artificial lake and river waters

“…The preparation of artificial seawater has been frequently discussed in the past. For example, Lyman and Fleming reported the preparation and use of artificial seawater in , and now, artificial seawater is routinely used in many fields of marine sciences (e.g., Sugiyama et al ; Berges et al ). The concentrations of chemical constituents in natural seawater change according to the sampling location of the water, but the concentration ratio of some constituents, especially the concentration ratio of major constituents, is almost constant regardless of the location.…”