Fig. 3.
Representative Cr(V) signals from LHC-9-grown BEAS-2B cells exposed under room air to Na2CrO4 for 5 min at 37°C in LHC-9 medium. Spectra were recorded at room temperature. (A) 400 µM Na2CrO4 plus 4.1 × 106 cells, 9 scans. (B) 400 µM isotopically pure Na253CrO4 plus 4.9 × 106 cells, 9 scans. (C) The same sample as B except 36 scans were collected. The reaction volume and instrument settings were the same as those in Fig. 1.