Every coal export laboratory, third-party inspection body and power-plant quality team eventually faces the same question: should total sulfur be determined by Coulomb titration or by high-temperature combustion with...

Professionals involved in coal quality testing should take note: the updated national standard GB/T 214-2026, Determination of Total Sulfur in Coal will directly affect routine laboratory testing, instrument compliance,...

Professionals familiar with Chinese national standards will know that GB/T 213, Determination of Calorific Value of Coal, provides a clear solution for coal samples that are prone to spattering...

Meta Description: Learn how the ABBA trend verification method identifies cross-contamination between coal samples and why equipment residue alone does not necessarily indicate contamination. Sample contamination is one of...