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Preconcentration of Volatile Hydrocarbons as Air Pollutants by C-18 Bonded Silica used for Solid Phase Extraction

 

作者: G. Stoev,  

 

期刊: Analytical Letters  （Taylor Available online 1999）
卷期: Volume 32, issue 14  

页码: 2825-2840

 

ISSN:0003-2719

 

年代: 1999

 

DOI:10.1080/00032719908543009

 

出版商: Taylor & Francis Group

 

关键词: Hydrocarbons;preconcentration;C-18 bonded silica;gas chromatography

 

数据来源: Taylor

 

摘要:

C18-Silica used for Solid-Phase Extraction exhibits the same degree of adsorption of volatile hydrocarbons as compared to conventional Tenax adsorbent. The vapor pressure of the hydrocarbons and the velocity of the air sample through the sorbent are dominants of the preconcentration. Recovery of 80% for n-hexane and 98% for p-xylene at a concentration of 10 mg.m−3was obtained at 10 ml.g−.min−velocity.

 

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