TAPPI T 625 CM-14 provides procedures for analyzing black liquor from soda and sulfate, or kraft, pulping processes. The method covers sampling, density or specific gravity, sulfated ash and organic matter, sodium sulfide, sodium sulfite, sodium thiosulfate, sodium sulfate, total alkali, active alkali, silica, iron, aluminum, sulfur, calcium, magnesium, and sodium.
This seven-page PDF includes required apparatus, reagents, safety precautions, detailed titration and gravimetric procedures, calculations, reporting guidance, precision information, keywords, and related technical references. It is intended for laboratory and process-control use within pulping operations.
Application Scope: Pulp and paper mills, chemical laboratories, and process-control teams analyzing soda or kraft black liquor composition.
