scholarly journals Continuous Monitoring of Resin Content in Prepreg Unidirectional Tapes by Beta-Ray Method

2002 ◽  
Vol 11 (1) ◽  
pp. 096369350201100 ◽  
Author(s):  
Y.D. Huang ◽  
L. Liu ◽  
Y.F. Sun ◽  
J.H. Qiu ◽  
N. Nakayama ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Continuous Monitoring ◽  
Resin Content ◽  
Ray Method ◽  
Impregnation Process ◽  
Monitoring Technique ◽  
Solvent Extraction Method ◽  
Conventional Solvent Extraction ◽  
Calibration Relations

A beta-ray monitoring technique has been developed to measure the resin content during the manufacture of prepreg unidirectional tapes by solution impregnation process. A series of calibration relations have been obtained for aramid, carbon and glass fibres reinforced epoxy prepreg tapes, and good agreements with resin content have been shown by the beta-ray system and conventional solvent extraction method. Moreover, the effect of the variation of the fibre areal weight on measuring accuracy has been analysed.

Note: A rapid method for the determination of lipids an fatty acids in bread by gas chromatography / Nota: Método rápido para la determinación de lípidos y ácidos grasos en pan mediante cromatografía de gases

1998 ◽  
Vol 4 (3) ◽  
pp. 207-210
Author(s):  
Y.A. Sultanovitch ◽  
O. Philipp ◽  
M. Schmelewa ◽  
H.D. Isengard
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Solvent Extraction ◽  
Analytical Method ◽  
Extraction Method ◽  
Conversion Factor ◽  
High Sensitivity ◽  
Solvent Extraction Method ◽  
Conventional Solvent Extraction

A new simple and fast analytical method was developed to characterize the content of lipids and fatty acids in bread. First, fatty acids were determined by gas chromatography and then the content of lipids was calculated by using a conversion factor. This method gave very accurate results; it was three times faster than the conventional solvent extraction method and its consumption of solvent was much lower. The high sensitivity allowed the distribution of lipids in bread to be determined.

scholarly journals Gas Chromatography of Urinary Anthranilic Acid and 3-Hydroxyanthranilic Acid by Solvent Extraction Method

1972 ◽  
Vol 20 (7) ◽  
pp. 1412-1416 ◽  
Author(s):  
KAZUYUKI HIRANO ◽  
KAZUMI MORI ◽  
NOBUKO TSUBOI ◽  
SATOSHI KAWAI ◽  
TAKEO OHNO
Keyword(s):  
Gas Chromatography ◽  
Solvent Extraction ◽  
Anthranilic Acid ◽  
Extraction Method ◽  
Solvent Extraction Method ◽  
Hydroxyanthranilic Acid

Extraction of 2-Acetyl-1-Pyrroline (2AP) in Pandan Leaves (Pandanus Amaryllifolius Roxb.) Via Solvent Extraction Method: Effect of Solvent

2014 ◽  
Vol 67 (2) ◽  
Author(s):  
Norzita Ngadi ◽  
Noor Yahida Yahya
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Extraction Process ◽  
Natural Sources ◽  
Effect Of Solvent ◽  
Method Effect ◽  
Solvent Extraction Method ◽  
Pandanus Amaryllifolius

Pandan (Pandanus amaryllifolius Roxb.) leaves are widely used in Malaysia as a source of natural flavoring.  The major compound contributing to the characteristic flavour of Pandan is 2-acetyl-1-pyrroline (2AP). As the consumer requirement for use of natural flavours, extraction of components from natural sources has been sought. In this study, solvent extraction of 2AP from Pandan leaves was performed. The effect of solvent used during extraction process (i.e. methanol, ethanol, propanol) towards the yield of 2AP was investigated. The presence of 2AP was determined using GCMS. The results obtained showed that ethanol was the best solvent to extract 2AP from Pandan leaves compared to methanol as higher 2AP peak arises from ethanol chromatogram.  However there is no 2AP detected when propanol was used as solvent.  It is believed that polarity of the solvent plays an important role in the extraction of 2AP.

Treatment of Textile Wastewater using Biodegradable Flocculants of Chitosan and Extracted Pandan Leaves

2013 ◽  
Vol 64 (1) ◽  
Author(s):  
Norzita Ngadi ◽  
Nor Aida Yusoff
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Textile Wastewater ◽  
Settling Time ◽  
Turbidity Removal ◽  
Test Experiment ◽  
Jar Test ◽  
Solvent Extraction Method ◽  
Flocculation Process

The study investigated the performance of chitosan and extracted pandan leaves towards treatment of textile wastewater by using flocculation process. Pandan leaves were extracted by using solvent extraction method. Flocculation process was conducted using a Jar test experiment. The effect of dosage, pH, and settling time on reduction of COD, turbidity and color of textile wastewater was studied. The results obtained found that chitosan was very effective for reduction of COD, turbidity, color and indicator for color. The best condition for COD and turbidity removal was achieved at 0.2 g dosage, pH 4 and 60 minutes of settling time. Under this condition, about 58 and 99% of COD and turbidity was removed, respectively. However, the results obtained using extracted pandan was opposite compared to the chitosan. Extracted pandan was not able to remove both COD and turbidity of the waste. 

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