A novel X-ray radiography approach for the characterization of granular activated carbons used in the rum production

Journal of Analytical Science and Technology

Table 3 Grey-scale intensity and linear absorption coefficient at different GAC layers and GAC-virgin (22 keV–125 mAs)

GAC layer	Top (0)	0.2	0.4	0.6	0.8	1.0	1.3	Bottom (1.5)	GAC-virgin
\( \overline{\mathrm{GSI}} \)	0.322	0.360	0.345	0.400	0.333	0.357	0.313	0.259	0.0703
μ	0.368	0.377	0.373	0.385	0.370	0.376	0.365	0.349	0.241
σ (\( \overline{\mathrm{GSI}} \))	0.022	0.023	0.022	0.023	0.022	0.019	0.021	0.020	0.014

The linear absorption coefficient μ was calculated using Eq. (10) with GSI₀ = 0.0039
\( \overline{GSI} \) mean of grey-scale intensity values for five independent experiments,\( \sigma \left(\overline{GSI}\right) \) standard deviation