Fig. 4From: Carbon nanomaterial-derived lung burden analysis using UV-Vis spectrophotometry and proteinase K digestionThe standard curve fit of CNMs using a UV-Vis spectrophotometer. CNMs were dispersed in distilled water with 3% foetal bovine serum and absorbance was measured at 750 nm. a, carbon black (CB); b, nanodiamond (ND); c, multi-walled carbon nanotube (MWCNT); d, carbon nanofiber (CNF); e, graphene nanoplatelet (GNP). Data are expressed as mean ± SEM and n = 4Back to article page