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A general method of analysis for high volume air samples. I

Sulphate and sulphuric acid

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Summary

Sulphuric acid, found as such in air, may be measured accurately by separation of the sulphuric acid from the sample matrix by microdiffusion at 200° C, which effectively separates volatile from nonvolatile sulphate. The muasurement of the separated volatile sulphate (sulphuric acid) may then by carried out by a microtitration specific for sulphate or by square wave polarography, the latter method being much more rapid.

The method proposed is free from the inaccuracies and ambiguities associated with procedures which depend upon ph measurement or non-specific acid-base titration.

Zusammenfassung

In Luftproben als solche auftretende Schwefelsäure läßt sich genau bestimmen, indem man sie vorher durch Mikrodiffusion bei 200° von nichtflüchtigem Sulfat abtrennt. Die Messung erfolgt dann entweder durch eine spezifische Mikrosulfattitration oder durch Rechteck-Wellen-Polarographie. Letztere Methode ist rascher. Das vorgeschlagene Verfahren ist frei von Unsicherheiten und Ungenauigkeiten, wie sie anderen Verfahren anhaften, die auf der ph-Messung oder auf unspezifischer Säure-Base-Titration beruhen.

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Dubois, L., Thomas, R.S., Teichman, T. et al. A general method of analysis for high volume air samples. I. Mikrochim Acta 57, 1268–1275 (1969). https://doi.org/10.1007/BF01271403

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  • DOI: https://doi.org/10.1007/BF01271403

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