The use of impregnated filters to collect traces of gases in the atmosphere : Part ii. collection of sulfur dioxide on membrane filters
✍ Scribed by John B. Pate; James P. Lodge jr.; Michael P. Neary
- Publisher
- Elsevier Science
- Year
- 1963
- Tongue
- English
- Weight
- 620 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
In a preceding paper 1, the significance and utility of using impregnated filters as collecting devices for gases were examined. The nature of membrane filters and the theoretical,and practical suitability of Millipore* filters as a substrate was evaluated.
Sulfur dioxide was selected as the initial gas to be used for development and evaluation of the methodology. The .continuing interest in sulfur dioxide as an atmos-'pheric constituent and the availability of sensitive and selective analytical methods for its determination dictated its selection. rn this paper the methodology and effects of impregnating filters are examined. The'apparatus and procedures used in preparation and sampling known concentrations of sulfur dioxide in air are detailed. The results obtained when known concentrations are sampled using impregnated filters are evaluated. It is planned that future, papers in this series will detail the analytical methodology and results obtained from atmospheric sampling.
After preliminary experiments with assorted filter types, impregnating solutions
'*S * Trademarked designation of mombranc filtcw marketed by Millipore Corp., Bedford, Mass.