FTIR spectroscopic determination of soap in refined vegetable oils
A new analytical method was developed for the determination of soap in palm and groundnut oils by FTIR spectroscopy. Soap from 0 to 80 mg/kg oil was produced in situ in the oils by adding sodium hydroxide. The FTIR spectroscopy was with a sodium chloride transmission cell, and the partial least-squa...
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| Format: | Article |
| Language: | English |
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American Oil Chemists' Society
2002
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| Online Access: | http://psasir.upm.edu.my/id/eprint/115626/ http://psasir.upm.edu.my/id/eprint/115626/1/115626.pdf |
| _version_ | 1848866827810111488 |
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| author | Mirghani, M.E.S. Che Man, Y.B. Jinap, S. Baharin, B.S. Bakar, J. |
| author_facet | Mirghani, M.E.S. Che Man, Y.B. Jinap, S. Baharin, B.S. Bakar, J. |
| author_sort | Mirghani, M.E.S. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | A new analytical method was developed for the determination of soap in palm and groundnut oils by FTIR spectroscopy. Soap from 0 to 80 mg/kg oil was produced in situ in the oils by adding sodium hydroxide. The FTIR spectroscopy was with a sodium chloride transmission cell, and the partial least-squares statistical method was used to calibrate a model for each oil. The accuracy of the method was comparable to that of AOCS Method Cc17-95, with coefficients of determination (R2) of 0.98 and 0.98 for both palm and groundnut oils. The standard errors of calibration were 1.84 and 1.36 for the two oils, respectively. The calibration models were cross-validated, and the R2 of cross-validation and standard errors of cross validation were computed. The standard deviation of the difference for repeatability of the FTIR method was better than that for the chemical method used for determining soap in palm and groundnut oils. With its speed and ease of data manipulation by computer software, FTIR spectroscopy is a possible alternative to the standard wet chemical methods for rapid (2 min) and accurate routine determination of soap in chemically refined vegetable oils. |
| first_indexed | 2025-11-15T14:26:48Z |
| format | Article |
| id | upm-115626 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:26:48Z |
| publishDate | 2002 |
| publisher | American Oil Chemists' Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1156262025-03-10T02:55:58Z http://psasir.upm.edu.my/id/eprint/115626/ FTIR spectroscopic determination of soap in refined vegetable oils Mirghani, M.E.S. Che Man, Y.B. Jinap, S. Baharin, B.S. Bakar, J. A new analytical method was developed for the determination of soap in palm and groundnut oils by FTIR spectroscopy. Soap from 0 to 80 mg/kg oil was produced in situ in the oils by adding sodium hydroxide. The FTIR spectroscopy was with a sodium chloride transmission cell, and the partial least-squares statistical method was used to calibrate a model for each oil. The accuracy of the method was comparable to that of AOCS Method Cc17-95, with coefficients of determination (R2) of 0.98 and 0.98 for both palm and groundnut oils. The standard errors of calibration were 1.84 and 1.36 for the two oils, respectively. The calibration models were cross-validated, and the R2 of cross-validation and standard errors of cross validation were computed. The standard deviation of the difference for repeatability of the FTIR method was better than that for the chemical method used for determining soap in palm and groundnut oils. With its speed and ease of data manipulation by computer software, FTIR spectroscopy is a possible alternative to the standard wet chemical methods for rapid (2 min) and accurate routine determination of soap in chemically refined vegetable oils. American Oil Chemists' Society 2002 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/115626/1/115626.pdf Mirghani, M.E.S. and Che Man, Y.B. and Jinap, S. and Baharin, B.S. and Bakar, J. (2002) FTIR spectroscopic determination of soap in refined vegetable oils. Journal of the American Oil Chemists' Society, 79 (2). pp. 111-116. ISSN 0003-021X; eISSN: 0003-021X https://aocs.onlinelibrary.wiley.com/doi/10.1007/s11746-002-0443-4 10.1007/s11746-002-0443-4 |
| spellingShingle | Mirghani, M.E.S. Che Man, Y.B. Jinap, S. Baharin, B.S. Bakar, J. FTIR spectroscopic determination of soap in refined vegetable oils |
| title | FTIR spectroscopic determination of soap in refined vegetable oils |
| title_full | FTIR spectroscopic determination of soap in refined vegetable oils |
| title_fullStr | FTIR spectroscopic determination of soap in refined vegetable oils |
| title_full_unstemmed | FTIR spectroscopic determination of soap in refined vegetable oils |
| title_short | FTIR spectroscopic determination of soap in refined vegetable oils |
| title_sort | ftir spectroscopic determination of soap in refined vegetable oils |
| url | http://psasir.upm.edu.my/id/eprint/115626/ http://psasir.upm.edu.my/id/eprint/115626/ http://psasir.upm.edu.my/id/eprint/115626/ http://psasir.upm.edu.my/id/eprint/115626/1/115626.pdf |