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

Table 1

Effect of interference on extraction and determination of brilliant blue FCF.

Foreign species	Tolerance limit (ng/mL)
Glucose, lactose, Cl^−	1000
Folic vitamin C, vitamin A, NO^3−	700
Zn^2+, citrate	600
Oxalate, tartarate, vitamin D	500
NH^4+, Mg^2+, F^−,K^+, Cu^2+, Fe^2+, Ca^2+	300
Vitamin B1, PO42−,Fe^3+, Cd^2+, SO42−	60
Vitamin B12, vitamin B6	10
I^−, Ascorbic acid	3