Technical Bulletin No. 0038: Compendium of Methods for Measuring Ambient Air Quality and Process Emissions Section 11A – Gaseous Emissions – Automatic Techniques – Electrolytic Tit

During 1968 the National Council staff began work on the assembly of a compendium of methods for measuring ambient air quality and process emissions. It was recognized at the outset that such a compendium would require constant updating as new techniques evolved and were proven useful in practice, and others became obsolete. A format was therefore developed which would permit distribution of completed (and subsequently revised) sections of this compendium as regular technical bulletins as they became available, accompanied by an updated Table of Contents which would relate each section to the total project. Each technical bulletin in this series will therefore carry the same general title as a reminder of its place in the Compendium. The second bulletin to be distributed summarizes the current status of electrolytic titration with bromine as a means of detecting total and specific reduced sulfur compound emission from kraft pulping process sources. Since the equipment employed is not sufficiently sensitive for ambient air studies, this bulletin is incorporated in Part III of the Compendium, under "Process Emission Source Monitoring." The technique is capable of detecting as little as 50 ppb of the more common reduced sulfur compound emissions, and has proven readily-adaptable to monitoring the principal source of such emissions, the kraft mill recovery furnace. The techniques employed have been field tested at numerous mills in the Pacific Northwest, and in parallel studies conducted at southern kraft mills under the direction of Leon Duncan, Southern Region Air Research Engineer Centers.