Development and optimisation of a non conventional extraction process of natural dye from olive solid waste using response surface methodology (RSM)

作者：Elksibi Imen^*; Haddar Wafa; Ben Ticha Manel; Gharbi Rafik; Mhenni Mohamed F

来源：Food Chemistry, 2014, 161: 345-352.

DOI：10.1016/j.foodchem.2014.03.108

• Olive waste
• Extraction
• Response surface methodology
• Optimisation

Dyes obtained from different natural sources have emerged as an important alternative to synthetic dyes.
In this study, optimisation of natural colorant non-conventional extraction technique from olive waste was investigated using response surface methodology. The combined effects of extraction conditions on total phenolic content (TPC) and relative color strength (K/S) were studied using a three-level three-factor Box-Behnken design. The optimum conditions for dye extraction were found to be 0.14 mol/L, 62.11 min, 71.23 degrees C and 4.5 g for sodium hydroxide concentration, extraction time, temperature, and mass of the waste, respectively.
The efficiency of extraction under these optimum conditions was found to be 1133.86 mg/L of phenolics and relative colour strength (KIS) equal to 23.22. Further, Fourier Transform Infrared Spectroscopy was used to identify the major chemical groups in the extracted dye.

• 出版日期2014-10-15