000			03423ntm a2200337 i 4500
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005			20260603124742.0
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008			260603t20252025my a|||fr|||| 000 0 eng d
020			_aTHE0010537 (Local) _qHardback
040			_aUMPSA _beng _cUMPSA _erda
090			_aFTKEE .S53 2025 r Thesis
100	0		_aWan Mohamad Shafiq Wan Salleh, _eauthor.
245	1	0	_aSpectroscopy study of free fatty ACID detection using an open path optical method / _cWan Mohamad Shafiq Wan Salleh
264		1	_aKuantan, Pahang : _bUMPSA, _c2025
264		4	_c© 2025
300			_axiv, 82 pages : _billustrations : _c30 cm. + _e1 CD ROM.
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
347			_2rda _atext file _bPDF
500			_aFaculty of Electrical & Electronics Engineering
502			_aThesis (Master of Science) -- Universiti Malaysia Pahang - 2025
504			_aIncludes bibliographical references
520	3		_ahas high oxidative stability when used for frying. However, repeatedly heated palm oil leads to chemical deterioration which can lead to the formation of compounds that are dangerous to the human body which are called free fatty acids. Consumers know that repeatedly heated cooking oil is harmful to the human body but most people do not know how many times cooking oil can be used. Currently, there are not many options to determine the level of free fatty acid. The current technology requires a high cost of equipment. In this research, the open path optical method was chosen to determine the level of free fatty acid in the palm cooking oil. The open path optical method was chosen because this technique does not change the chemical properties of the sample as no other chemical is added to the sample. The objective of this study is to analyze the absorbance spectrum of repeatedly heated palm oil and identify the optimum wavelength for free fatty acid study. Besides that, to determine the relationship between the concentration of free fatty acid and the absorbance and to verify the reading of the absorbance spectrum using an oil test strip. A light source and a spectrometer were used in this research with the help of the Spectrasuite software. The prepared sample was heated cooking oil that was heated for a different duration. The samples were poured into a cuvette then the cuvette was placed inside the setup to obtain the absorbance spectrum of each sample. The experiment result shows that the sample that was heated for the longest duration displays the highest absorbance compared to the other prepared samples. Specifically, the absorbance of each sample is increased by 0.02% - 0.04% compared to the unheated oil cooking palm. In this research, at the wavelength of 364 nm was identified as the optimum wavelength to assess the concentration of the FFA. The absorbance spectrum and concentration of free fatty acid are different if the heating duration is different as discussed in the studies. The result produced from the open-path optical method was compared with a chemical test, demonstrating that the accuracy of this method is comparable to that of commercial oil test strips.
610	2	0	_aFaculty of Electrical & Electronics Engineering _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses _xDissertations
942			_2lcc _cTHESIS
999			_c104907 _d104913