2412
Anal. Chem. WOO, 62, 2412-2414
percent recovery over the concentration range tested (0.2-15.0 wmol kg-'). A representative CHI profile obtained in the lower basin of the Pettaquamscutt River is presented in Figure 5. It depicts temperature and the log of the partial pressure of CHI (pCH,) in ppm above and below the oxic-anoxic interface. Given the magnitude and variation (39-4200 ppm) of the in situ CH4 concentrations in the lower basin, the precision of the method (
