Comparison of Common Solvent Evaporation Techniques in Organic Analysis
作者:
MitchellD. Erickson,
MaryT. Giguere,
DonaldA. Whitaker,
期刊:
Analytical Letters
(Taylor Available online 1981)
卷期:
Volume 14,
issue 11
页码: 841-857
ISSN:0003-2719
年代: 1981
DOI:10.1080/00032718108081439
出版商: Taylor & Francis Group
关键词: Solvent evaporation;sample concentration organic analysis
数据来源: Taylor
摘要:
Isolation of organic constituents from water frequently involves an extraction with a large volume of organic solvent which must be reduced to achieve the desired sensitivity. The objective of this research was to evaluatecommonsolvent evaporation techniques to determine which are acceptable for use in pollutant analysis. Techniques for solvent reduction from 200 to 10 mL (macro) and 8 to 0.2 mL (micro) were evaluated. The macro concentration technques included Kuderna-Danish (K-D) concentration, rotary evaporation, evaporation on a hot plate in an Erlen-meyer flask, and heated nitrogen blowdown in an Erlenmeyer flask. The micro techniques included micro K-D concentration, nitrogen blowdown, and nitrogen blowdown with a modified Snyder column. A series of model compounds covering a wide range of boiling points (108° to 323°C) and polarity was used. Based upon recovery efficiency alone, nitrogen blowdown was significantly superior to the other macro techniques; however, its extreme slowness gave K-D the highest Figure of Merit. With methylene chloride as the solvent, nitrogen blowdown with a column was the superior technique.
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