Determination of Total Sulfur in Graphene with Organic Elemental Analyzer

Abstract

In the present work, a method for the determination of total sulfur in graphene with the organic elemental analyzer is presented. The effects of combustion temperature, combustion time, oxygen flow rate, filling reagent, and other factors on measurement results were examined. The results showed that the optimum test results can be obtained when the combustion tube temperature is 1050°C, combustion time 80s, the oxygen flow rate 25 ml/min and tungsten oxide/copper scraps used as the filling reagent. The repeatability, stability, and spike recovery of this method fall into the ranges of 3.4%~ 5.1%, 4.5% ~ 6.6%, and 92.5% ~ 108.6%, respectively. The detection limit is 0.09%, and the deviation between this method and the Eschka method as an arbitration method is -0.02%~-0.08%. Since there is no significant difference between the two methods, both can be used for the accurate determination of total sulfur in graphene.