Rapid Method for the Determination of Moisture Content in Biodiesel Using FTIR Spectroscopy

Rapid Method for the Determination of Moisture Content in Biodiesel Using FTIR Spectroscopy

A new, rapid, and direct method was developed for the determination of moisture content in biodiesel produced from various types of oils using Fourier transform infrared (FTIR) spectroscopy with an attenuated total reflectance (ATR) element. Samples of biodiesels used in this study were produced usi...

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Bibliographic Details
Published in:Journal of the American Oil Chemists' Society Vol. 88; no. 12; pp. 1897 - 1904
Main Authors: Mirghani, Mohamed E. S, Kabbashi, Nasreldin A, Alam, Md. Zahangir, Qudsieh, Isam Y, Alkatib, Ma’an F. R
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01-12-2011
Springer
Springer Nature B.V
Subjects:
absorbance
Agriculture
Attenuated total reflectance (ATR)
Biodiesel
Biodiesel fuels
Biological and medical sciences
Biomaterials
Biotechnology
Calibration
Chemistry
Chemistry and Materials Science
chemists
Distillation
Distilled water
Fat industries
Food industries
Food Science
Fourier transform infrared spectroscopy
Fourier transforms
FTIR spectroscopy
Fundamental and applied biological sciences. Psychology
Industrial Chemistry/Chemical Engineering
Moisture content
Original Paper
Palm oil
palm oils
Partial least square (PLS)
Quality control
rapid methods
reflectance
regression analysis
Sludge
Sludge palm oil (SPO)
Spectroscopy
Spectrum analysis
Vegetable oils
water content
wavelengths
Partial least square (PLS)
Sludge palm oil (SPO)
Attenuated total reflectance (ATR)
Moisture content
Biodiesel
FTIR spectroscopy
Vegetable oil
Method
Edible oil
Oils and fats industry
Palm oil
Alternative motor fuel
Water content
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Summary:A new, rapid, and direct method was developed for the determination of moisture content in biodiesel produced from various types of oils using Fourier transform infrared (FTIR) spectroscopy with an attenuated total reflectance (ATR) element. Samples of biodiesels used in this study were produced using sludge palm oil (SPO). 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 wavelength regions 3,700–3,075 and 1,700–1,500 cm−1, and the partial least square (PLS) regression method were used to derive a FTIR spectroscopic calibration model for moisture content in biodiesel samples. The coefficient of determinations (R 2) for the models was computed by comparing the results obtained from FTIR spectroscopy against the values of the moisture concentrations (%) determined using the American Oil Chemists’ Society (AOCS) oven method Ca 2d-25. Same comparison was done using International Union of Pure and Applied Chemistry (IUPAC) distillation method 2.602. R 2 was 0.9793 and 0.9700 using AOCS and IUPAC methods, respectively. The standard error (SE) of calibration was 1.84. The calibration model was 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 was determined. With its speed and ease of data manipulation, FTIR spectroscopy is a useful alternative method to other methods for rapid and routine determination of moisture content in biodiesel for quality control.
Bibliography:http://dx.doi.org/10.1007/s11746-011-1866-0
ISSN:0003-021X
1558-9331
DOI:10.1007/s11746-011-1866-0