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

Figure 5

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