Rapid method for the determination of moisture content in biodiesel produced from insects' oil using FTIR spectroscopy
A new, rapid, and direct method was developed for the determination of moisture content in biodiesel produced from insects’ oil using Fourier transform infrared (FTIR) spectroscopy with Attenuated total reflectance (ATR) element. The calibration set was prepared by spiking double distilled water...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/10343/ http://irep.iium.edu.my/10343/ http://irep.iium.edu.my/10343/1/Rapid_Method_for_the_Determination_of_moisture_Content_in_Biodiesel_Produced_from_Insect%E2%80%99s_Oil_using_FTIR_Spectroscopy_-_POSTER.pdf |
| Summary: | A new, rapid, and direct method was developed for the determination of moisture
content in biodiesel produced from insects’ oil using Fourier transform infrared (FTIR)
spectroscopy with Attenuated total reflectance (ATR) element. The calibration set was
prepared by spiking double distilled water into dried biodiesel samples in ratios (w/w)
between 0 and 10% moisture. Absorbance values from the wavelengths regions 3500 –
3050 cm–1 and 1680 – 1600 cm–1 and partial least square (PLS) regression method were
used to derive FTIR spectroscopic calibration model for moisture content in biodiesel
samples. The coefficient of determinations (R2) for the models was computed by
comparing the results obtained from FTIR spectroscopy against the actual values of the
moisture concentrations (%). R2 was 0.9321 and the standard error (SE) of calibration
was 1.84. The calibration model were cross validated within the same set of samples and
the standard deviation (SD) of the difference for repeatability (SDDr) and accuracy
(SDDa) of the FTIR method were determined. With its speed and ease of data
manipulation, FTIR spectroscopy is a useful alternative method to wet chemical methods
for rapid and routine determination of moisture content in such products for quality
control. |
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