Fig. 6From: Carbon nanomaterial-derived lung burden analysis using UV-Vis spectrophotometry and proteinase K digestionThe recovery rate of CNMs mixed with lung tissue homogenates following proteinase K (PK) digestion. All CNMs in the tested dose ranges showed a more than 86% recovery rate from lung tissue homogenates following PK digestion. a, carbon black; b, nanodiamond; c, carbon nanotube; d, carbon nanofiber; e, graphene nanoplatelet. Data are expressed as mean ± SEM and n = 4. The detailed numeric data are presented in Tables S1 and S2 (see Supporting Information)Back to article page