The underivatized acetone and hexane fractions from propolis samples (predominant flora Citrus spp. and Vernonia polyanthes) were analyzed by HT-HRGC (high temperature high resolution gas chromatography) and HT-HRGC coupled to mass spectrometry (HT-HRGC-MS). Several compounds, including flavonoid ag
Application of high temperature high resolution gas chromatography to paraffinic deposits in petroleum production pipelines
✍ Scribed by de Aquino Neto, Francisco Radler ;Cardoso, Jari Nobrega ;dos Santos Pereira, Alberto ;Fernandes, Maria Conceiçao Zupo ;Caetano, Carlos Alberto ;de Castro Machado, Andre Luiz
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 417 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0935-6304
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✦ Synopsis
Abstract
HTHRGC was found essential for optimizing representative preparation of high molecular weight samples and enabling fingerprinting of heavy fractions of crude oils and associated paraffinic deposits in production pipelines. Laboratory experiments aimed at simulating the process of paraffin deposition could also be easily evaluated. A comparative investigation of the performance of cold on‐column and SPI (PTV type) injectors, in conjunction with high temperature capillary columns, for analysis of high molecular weight fractions, was also conducted during the course of this work.
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