Journal of Analytical Methods in Chemistry / 2016 / Article / Tab 2

Research Article

Measurement of Total Free Iron in Soils by H2S Chemisorption and Comparison with the Citrate Bicarbonate Dithionite Method

Table 2

The sulfur capacities of the Loupi soil at various temperatures under the experimental condition of 50% H2 and 1% H2S with balanced N2.

TemperatureBreakthrough time (min)Sulfur content (%)Sulfur content by EA (%)Sulfur balance
Estimated total free iron

673 K200.220.2395.652.05
723 K261.131.12100.892.66
773 K321.391.37101.463.28
823 K301.311.30100.763.07
873 K210.910.9298.912.15
923 K190.830.8498.811.95

CBD-Fe: 4.28 (Fe2O3%).

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