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See Chinese contents: GB/T 214-2007 GB/T 214-2007: Determination of total sulfur in coal
This Standard specifies the method principle, reagents and materials, apparatus, test procedures, results calculation and precision, etc. of the Eschka method, coulometric titration, high temperature combustion neutralization method for the determination of sulfur in coal. For the arbitration analysis, the Eschka method shall be taken.
