Abstract
An analytical procedure was developed to monitor the batch reaction of coconut oil and diethanolamine which also would determine the cocodiethanolamide (CDEA) content of the final product. The method was based on attenuated total reflectance Fourier transform infrared spectrometry utilizing partial least squares regression. The calibration was modeled in the 1,781–1,714 and 1,658–1,639 cm−1 spectral regions for coconut oil and CDEA respectively. The models were then applied to predict the amidation process yield and to monitor the in situ kinetics of reactions between coconut oil and DEA. The root mean square error of prediction was 0.590 and 0.336 for coconut oil and CDEA respectively. The proposed method can also be successfully applied to the determination of purity in commercial grade CDEA samples and would give reliable results in comparison with the potentiometric titration reference method.
Similar content being viewed by others
Abbreviations
- ATR-FTIR:
-
Attenuated total reflectance Fourier transform infrared spectrometry
- CDEA:
-
Cocodiethanolamide
- DEA:
-
Diethanolamine
- PLS:
-
Partial least square
References
Gervajio GC (2005) Bailey’s industrial oil and fat product. Industrial and non edible products from oil and fats, vol 6, 6th edn. Wiley, New York
Cullum DC (1994) Introduction to surfactant analysis, 1st edn. Blackie, Glasgow
Nakamora K, Morikawa Y (1982) Separation of surfactant mixtures and their homologues high performance liquid chromatography. J Am Oil Chem Soc 59:64–68
Park HS, Ryu HR, Rhee CK (2006) Simultaneous separation of nine surfactants of various types by HPLC with evaporative light scattering detection. Talanta 70:481–484
Park HS, Rhee CK (2004) Simultaneous determination of nonionic and anionic industrial surfactants by liquid chromatography combined with evaporative light-scattering detection. J Chromatogr A 1046:289–291
O’Connell AW (1977) Analysis of coconut oil–diethanolamine condensates by gas chromatography. Anal Chem 49:835–838
Bernabe-Zafon VB, Torres-Lapasio JR, Ortaga-Gadea S, Simo-Alfonso EF, Ramis-Ramos G (2005) Capillary electrophoresis enhanced by automatic two-way background correction using cubic smoothing splines and multivariate data analysis applied to the characterisation of mixtures of surfactants. J Chromatogr A 1065:301–313
Rambla FJ, Garrigues S, Ferrer N, de la Guardia M (1998) Simple partial least squares-attenuated total reflectance Fourier transform infrared spectrometric method for the determination of sugars in fruit juices and soft drinks using aqueous standards. Analyst 123:277–281
Khanmohammadi M, Ashori A, Kargosha K, Bagheri Garmarudi A (2007) Simultaneous determination of sodium tripolyphosphate, sodium sulfate and linear alkylbenzensulfonate in washing powder by attenuated total reflectance: Fourier transform infrared spectrometry. J Surfactants Detergents 10:81–86
Goicoechea H, Olivieri AC (2001) Sustained prediction ability of net analyte preprocessing methods using reduced calibration sets. Theoretical and experimental study involving the spectrophotometric analysis of multicomponent mixtures. Analyst 126:1105–1112
Spilker R (2005) Determination of anionic surfactants. In: Waldhoff H, Spilker R (eds) Handbook of detergents, part C analysis. Marcel Dekker, New York, p 267
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Khanmohammadi, M., Kojidi, M.H., Garmarudi, A.B. et al. Quantitative Monitoring of the Amidation Reaction Between Coconut Oil and Diethanolamine by Attenuated Total Reflectance Fourier Transform Infrared Spectrometry. J Surfact Deterg 12, 37–41 (2009). https://doi.org/10.1007/s11743-008-1101-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11743-008-1101-7