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Mercury and gold concentrations of highly polluted environmental samples determined using prompt $$gamma$$-ray analysis and instrument neutron activation analysis

Osawa, Takahito  ; Hatsukawa, Yuichi; Appel, P. W. U.*; Matsue, Hideaki 

The authors have established a method of determining mercury and gold in severely polluted environ-mental samples using prompt $$gamma$$-ray analysis (PGA) and instrumental neutron activation analysis (INAA). Since large amounts of mercury are constantly being released into the environment by small-scale gold mining in many developing countries, the mercury concentration in tailings and water has to be determined to mitigate environmental pollution. PGA can determine high mercury concentrations in polluted samples as it has an appropriate level of sensitivity. Moreover, gold concentrations can be determined sequentially by using INAA after PGA. In conclusion, the analytical procedure established in this work using PGA and INAA is the best way to evaluate the degree of pollution and the tailing resource value. This method will significantly contribute to mitigating problems in the global environment.

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