tailieunhanh - Olive Oil Constituents Quality Health Properties and Bioconversions Part 4

Tham khảo tài liệu 'olive oil constituents quality health properties and bioconversions part 4', khoa học tự nhiên, công nghệ sinh học phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 94 Olive Oil - Constituents Quality Health Properties and Bioconversions Fifteen experiments should be done in a CCD. Additionally to estimate the experimental error replications of factor combinations are necessary at the center point the level 0 . Experiment at the center point has been repeated five times. The total number of experiments in the CCD with three factors then amounts to 20 Morgan 1991 Otto 1999 . Accordingly 20 experiments given in Table 4 were carried out in the extent of the CCD optimization procedure. Coded values of levels Experiment no. Vldm moil ratio mL g-1 Xi Stirring time min. x2 Temperature C X3 1 -1 -1 -1 2 1 -1 -1 3 -1 1 -1 4 1 1 -1 5 -1 -1 1 6 1 -1 1 7 -1 1 1 8 1 1 1 9 0 0 0 10 -1 682 0 0 11 1 682 0 0 12 0 -1 682 0 13 0 1 682 0 14 0 0 -1 682 15 0 0 1 682 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 Table 4. The coded values of levels for the experiments in the extent of CCD Organo-metallic standards in oil Conostan code number 354770 for iron 687850 for copper were used in CCD and metal concentrations of oil standards were fixed to be a certain concentration. The metal concentrations of the extracts gained from each experiment were determined by FAAS. The obtained results were used in order to establish recovery values for the extraction of metals from oil. The response values y were calculated from experimentally obtained recovery percentages. The empirical equations were developed by means of response values Morgan 1991 Otto 1999 . The following y equations were constructed based on the b values which were calculated by applying to the appropriate matrixes. y - biXi b2X2 b-X- biiXi2 b22X22 b- -X--2 bi2XiX2 b-Ị-XiX- b2-X2X- 23X1X2X3 1 Metal Determinations in Olive Oil 95 New corresponding equations were obtained by equalization of the derivatives of y equation in terms of x1 x2 x3 to zero and solved using software to provide optimum extraction conditions. Optimum conditions are variable depending on the structure of Schiff base and .

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