3.3.2 how Ferric-reducing antioxidant power (FRAP)
were prepared from aqueous solution FRAP acetate buffer (pH 3.6), TPTZ 10 mM in
HCl. Concentrated solution concentration and 40 mM Ferrous chloride 20 mM ratio in 10: 1: 1 (V / V)
.Solution to have respectively. FRAP, prepare new every time before ใชง้ work and field water to warm bath control
อุณหภูมิ, 37 C before used
in the test with this method. To use extract 50 microliter volume design solution was added FRAP
v 1.5 ml mixed Ozunu legs, even with Ke Bock, are in the dark for a period of time 4 minutes used to measure light absorb
593 nm. By comparing with standard curve of the solution Ferric sulfate with
.The concentration in the range of 100-2000 thermal M. The experiment of three replications and examine
3.3.3 to our analysis. Time ability to resist free radicals level, with 2 2 '- Azino-bis (3-ethylbenzothiazoline -
6-sulfonic. Acid)
.ABTS solution prepared by mixing the solution cation radical ABTS 14 mM 5 ml and
4.9 mM potassium persulfate (K2S2O8) 5 ml mix to. The legs, even with to, leave this tower Whitton temperature, in the dark for
.16 hours before the ABTS to dilute solution with ethanol to the absorption of light in the wavelength convert
0.700 0.020 734 nm. Then the pipette solution ABTS 950 UL mix กบั
.Extract sample or standard compounds 50 UL by ใชน้ Yar dgree กลนั. A Blank mixture set left in this dark time
6 minutes. Then the measured absorbance at the wavelength 734 nm. Using
.BHT Trolox and as a control, and then calculate the ability of antioxidant activity (%)
.
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