Low level 137Cs measurements in deep seawater samples

Distribution of ¹³⁷Cs Radionuclide in Industrial Wastes Effluents of Gresik, East Java, Indonesia

“…This method has been successfully applied to the analysis of 137 Cs in small volumes of seawater [19,20]. Cesium was precipitated as a chloroplatinate.…”

Improvement of 137Cs analysis in small volume seawater samples using the Ogoya underground facility

“…Previous experiments 8 have shown that significant contamination of 137 Cs 8 from air and reagents in the laboratory is not a concern.…”

“…Previous experiments 8,11 have shown that the chemical yields of insoluble AMP/Cs complex in average were 98.5 % for 20 liter samples of seawater. During the process to remove 40 K from the AMP/Cs precipitation, a yield of 137 Cs was 93±13 %.…”

“…A detail of analytical procedure is described in elsewhere. 8,11 For deep waters, the AMP/Cs precipitates were dissolved in an alkali solution.…”

“…Recently, Aoyama et al 8 have improved the ammonium phosphomolybdate (AMP) procedure for determination of 137 Cs in seawater, which includes a reduction of the amount of AMP and achievement of high sensitivity of 137 Cs determination by using high-efficiency well-type Ge-detectors. Furthermore, ultra low background γ-spectrometry using Ge detectors with high efficiency and low background materials in an underground facility (Ogoya Underground facility: OUL) can realize higher sensitive determination of 137 Cs.…”