the Compton scattering intensity and the X-ray fluorescence intensity of Fe in coal were used to determine the ash content in coal. The maximum deviation was lefs than ±1.5% for the ash contents from 6% to 50%
and the relative error in comparison with the gravimetry was less than ±1.5%. In this paper
the use of different radioisotope sources to determine the ash contents was also discussed.
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references
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