Multivariate Study and Analysis of the Production of Citric Acid from Dates by Surface Method
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Khaled Al Shoaili, Fouzia Al-Rawahi, Mansoura Al-Amri, Muhammad Al-Sidrani, Amal Al-Ghafri. (1/4/2014). Multivariate Study and Analysis of the Production of Citric Acid from Dates by Surface Method. Journal of Agricultural Chemistry and Environment, 3, pp. 20-25.
Abstract
The production of citric acid from dates of the date palm Phoenix dactilifera was studied using a
full factorial design with two design variables; Aspergillus niger strain, and starter juice treatment.
Analyses of data have shown that mould type and the interaction between Aspergillus niger strain
+ juice treatment had significant effect (P ≥ 0.05) on the final total acidity. It was also found that all
design variables and the interaction between them had significant effect (P ≥ 0.05) on the final pH
and Total Soluble Solids. The highest total acidity expressed as citric acid was achieved with a
commercial strain of Aspergillus niger, and filtered and centrifuged date juice.
