Determination
Set instrument operating parameters (oven temperature, oxygen flow, calibration values, etc.) according to manufacturer’s instructions. Allow furnace and instrument to reach operating temperature and to stabilize. Warmup time may be ca 6 h from cold start. Establish system blanks as appropriate for analysis and calibrate blanks, if necessary. At least 5 blank analyses are recommended. Calibrate instrument by using 3-5 analyses of nitrogen standard as follows: