Determination of total acid number in the optimization of oleate production by using fourier transform infrared spectroscopy and multivariate calibration
tarafından
 
Toygar Türkün, Nihan, author.

Başlık
Determination of total acid number in the optimization of oleate production by using fourier transform infrared spectroscopy and multivariate calibration

Yazar
Toygar Türkün, Nihan, author.

Yazar Ek Girişi
Toygar Türkün, Nihan, author.

Fiziksel Tanımlama
x, 48 leaves: illustrarions, charts;+ 1 computer laser optical disc

Özet
Polyethylene glycol oleate (PEG-Oleate) is a non-ionic surfactant, and is an important emulsifier for water-oil systems. It is produced by reacting oleic acid and polyethylene glycol (PEG) under vacuum for around 4 hours and at 160 °C, in the presence of acid catalyst which is para toluene sulfonic acid (PTSA). The quality and process control of this production is determination of total acid number (TAN) by the standard method ASTM D974 which is a color indicator titration. Although titration is a simple method, it is relatively time consuming and prone to human error. Besides, the solvents used in titration method, are significantly unhealthy for humans. The aim of this study is to develop fast and simple procedure for the determination of total acid number based on Fourier Transform Infrared Spectroscopy (FTIR) combined with multivariate calibration methods namely Genetic Inverse Least Squares (GILS) and Partial Least Squares (PLS). The reference total acid number of the samples collected during the esterification reaction, had been carried out by the ASTM D974 standart method and the Fourier Transform Infrared (FTIR) spectra of the same samples were also collected simultaneously with single reflection diamond Attenuated Total Reflectance (ATR) accessory. Univariate calibration was applied on a specific wavenumber corresponding to the ester peak around 1739 cm–1. Although the changes in the ester peak was showing an inrease associated to the esterification of the reactants, the results of the univariate calibration was unsucsesful. The best regression coefficient was found to be 0.997 by GILS method along with SECV and SEP as 2.295 and 2.694 mg KOH/g, respectively. The results of GILS showed that it is possible to monitor esterification process of PEG oleate.

Konu Başlığı
Chemistry, Analytic.
 
Oleates.
 
Chemometrics.
 
Fourier transform infrared spectroscopy.
 
Chemical apparatus -- Calibration.

Yazar Ek Girişi
Özdemir, Durmuş

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Chemistry.

Tek Biçim Eser Adı
Thesis (Master)--İzmir Institute of Technology:Chemistry.
 
İzmir Institute of Technology:Chemistry--Thesis (Master).

Elektronik Erişim
Access to Electronic Versiyon.


KütüphaneMateryal TürüDemirbaş NumarasıYer NumarasıDurumu/İade Tarihi
IYTETezT002007QD75 .T75 2019Tez Koleksiyonu