Research Article

Aqueous Two-Phase Systems: A New Approach for the Determination of Brilliant Blue FCF in Water and Food Samples

Figure 4

Effect of amount of PEG 4000 on the extraction efficiency. Experimental conditions: volume of buffer; 9 mL, pH of sample; 5.5, amount of sodium carbonate; 2.5 gr, temperature; 35°C, centrifuging time; 10 min, 4 ng/mL of brilliant blue.
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