Journal of Analytical Science and Technology

Table 2 Grey-scale intensity (GSI) of the X-ray radiography images for the GAC-Top and GAC-virgin at 40 keV–4 mAs

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

x (mm)	40 keV–4 mAs
x (mm)	GAC-virgin	σ (GSI)	GAC-Top	σ (GSI)
0	0.0039	0	0.0039	0
4	0.0039	0	0.0039	0
8	0.0898	0.0079	0.0898	0.0079
12	0.0859	0.0075	0.1016	0.0123
16	0.1406	0.0170	0.1914	0.0035
20	0.1367	0.0101	0.1714	0.0035
24	0.1445	0.0170	0.2305	0.0043
28	0.2109	0.0052	0.2773	0.0061
32	0.2704	0.0061	0.3205	0.0012
36	0.4248	0.0031	0.4321	0.0035
40	0.4955	0.0053	0.1016	0.0073

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