Detail publikace

Studium tepelné degradace rostlinných olejů spektroskopickými metodami a jejich matematická analýza

TOBOLOVÁ, M. KŘESÁLEK, V. VAŠKOVÁ, H. BUČKOVÁ, M.

Originální název

Investigation of thermal degradation of vegetable oils by spectroscopic methods and its mathematical analysis

Český název

Studium tepelné degradace rostlinných olejů spektroskopickými metodami a jejich matematická analýza

Anglický název

Investigation of thermal degradation of vegetable oils by spectroscopic methods and its mathematical analysis

Typ

článek v časopise

Jazyk

en

Originální abstrakt

In this paper, relatively new spectroscopic methods were used for investigation of edible oils and their thermal degradation. There were included the samples of refined rapeseed and sunflower oil and the same oils heated for specified time interval at the temperature 200 deg. Celsius. The optical characteristics of oils have been investigated with Terahertz Time Domain Spectroscopy (THz-TDS). The refractive indices were calculated in the specified terahertz frequency range, processed and statistically evaluated. The Wilcoxon matched pairs test was carried out for comparison of unheated and heated oil samples. The results measured by THz-TDS were supplemented by Raman spectra analysis. Both methods seem to be capable analyzing tool for oil investigation.

Český abstrakt

Článek se zabývá studiem tepelné degradace jedlých olejů pomocí nových spektroskopických metod. Byly použity vzorky rafinovaného řepkového a slunečnicového oleje a vzorky stejných olejů po ohřevu na 200 stupňů Celsia po stanovenou dobu. Optické parametry olejů byly naměřeny pomocí terahertzové spektroskopie v časové oblasti (THz-TDS). V daném frekvenčním rozsahu byl zjištěn index lomu vzorků, jeho hodnoty byly dále analyzovány a vyhodnoceny. Pro porovnání vzorků před ohřevem a po něm byl použit Wilcoxonův párový test. Měření z THz spektroskopie bylo doplněno analýzou Ramanových spekter stejných vzorků.

Anglický abstrakt

In this paper, relatively new spectroscopic methods were used for investigation of edible oils and their thermal degradation. There were included the samples of refined rapeseed and sunflower oil and the same oils heated for specified time interval at the temperature 200 deg. Celsius. The optical characteristics of oils have been investigated with Terahertz Time Domain Spectroscopy (THz-TDS). The refractive indices were calculated in the specified terahertz frequency range, processed and statistically evaluated. The Wilcoxon matched pairs test was carried out for comparison of unheated and heated oil samples. The results measured by THz-TDS were supplemented by Raman spectra analysis. Both methods seem to be capable analyzing tool for oil investigation.

Klíčová slova

ohřev olejů; Ramanova spektroskopie; tepelná degradace; THz spektroskopie v časové doméně, rostlinný olej

Rok RIV

2014

Vydáno

09.12.2014

Strany od

213

Strany do

219

Strany počet

7

BibTex


@article{BUT113122,
  author="Marie {Nedvědová} and Vojtěch {Křesálek} and Hana {Vašková} and Martina {Bučková}",
  title="Investigation of thermal degradation of vegetable oils by spectroscopic methods and its mathematical analysis",
  annote="In this paper, relatively new spectroscopic methods were used for investigation of edible oils and their thermal degradation. There were included the samples of refined rapeseed and sunflower oil and the same oils heated for specified time interval at the temperature 200 deg. Celsius. The optical characteristics of oils have been investigated with Terahertz Time Domain Spectroscopy (THz-TDS). The refractive indices were calculated in the specified terahertz frequency range, processed and statistically evaluated. The Wilcoxon matched pairs test was carried out for comparison of unheated and heated oil samples. The results measured by THz-TDS were supplemented by Raman spectra analysis. Both methods seem to be capable analyzing tool for oil investigation.",
  chapter="113122",
  howpublished="print",
  number="1",
  volume="8",
  year="2014",
  month="december",
  pages="213--219",
  type="journal article"
}