As with the study of antioxidant vitamin c CUPRAC way, as a measure to increase the signal of the CUPRAC reagent when reacted with antioxidants. The study of initial concentrations of CuCl 2 in the analysis, it is an important factor by concentration, the appropriate default must be the initial concentrations, the signal, and it also wants to see a change of the signal decreases rapidly when the Commander of antioxidant content of STM.A little pool. This research studies the starting concentration appropriate for using CuCl2 in reaction to standard antioxidants. CuCl2 study starts at various concentrations ranging from 1 to 20 mM the graph shows the relationship between the concentration of CuCl2 and color intensity of the CUPRAC reagent shown in Figure 2.
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