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A four-page TAPPI classical test method for determining the active chemical content of commercial sodium hydrosulfite by iodine titration.
description
TAPPI T 622 cm-10 provides a laboratory procedure for analyzing sodium hydrosulfite (sodium dithionite) products and calculating the percentage of active Na2S2O4. The method covers required apparatus, reagents, chemical safety precautions, sampling, specimen preparation, iodine titration with back-titration using sodium thiosulfate, calculations, reporting requirements, and precision information. It is intended for technical, quality-control, and analytical laboratories evaluating commercial sodium hydrosulfite, including drum, lot, and shipment variability.
Application Scope: Quality control and laboratory analysis of sodium hydrosulfite used in pulp, paper, textile, chemical, and related industrial processes.
Details
Publisher
TAPPI
File size
47.38 KB
Pages
4
Format
PDF
Publication date
2010
