Determination of Sunset Yellow and Tartrazine in Food Samples by Combining Ionic Liquid-Based Aqueous Two-Phase System with High Performance Liquid Chromatography

Table 2

Determination of SY and Ta in food sample and recovery test ().

Sample	Ta^a (g/g)				SY^a(g/g)
	Added	Found	Recovery	GB-found^b	Added	Found	Recovery	GB-found^b
Soft drink 1	—	6.64 ± 0.14	—	6.51 ± 0.21	—	NT	—	ND
	5.0	11.46 ± 0.16	96.4%		5.0	4.86 ± 0.16	97.2%
	10.0	16.38 ± 0.14	97.4%		10.0	9.45 ± 011	94.5%
Soft drink 2	—	1.42 ± 0.24	—	1.38 ± 0.15	—	17.67 ± 0.32	—	17.09 ± 0.84
	2.00	3.32 ± 0.10	95.0%		10.00	27.18 ± 0.25	95.1%
	5.00	6.21 ± 0.18	95.8%		20.00	36.59 ± 0.16	94.6%
Soft drink 3	—	ND	—	ND	—	22.76 ± 0.23	—	21.86 ± 0.58
	5.00	4.76 ± 0.12	95.2%		15.00	36.98 ± 0.21	94.8%
	10.00	9.41 ± 0.26	94.1%		20.00	41.88 ± 0.15	95.6%
Candy 1	—	0.11 ± 0.05	—	1.11 ± 0.13	—	1.26 ± 0.15	—	1.20 ± 0.09
	2.00	2.07 ± 0.14	98.0%		2.00	3.19 ± 0.21	95.5%
	4.00	3.85 ± 0.18	93.5%		4.00	5.04 ± 0.15	94.5%
Candy 2	—	ND	—	ND	—	0.39 ± 0.02	—	0.38 ± 0.09
	0.50	0.47 ± 0.12	94.0%		0.50	0.86 ± 0.05	94.0%
	1.00	0.94 ± 0.13	94.0%		1.00	1.34 ± 0.07	95.0%
Papaya powder	—	ND	—	ND	—	1.50 ± 0.17	—	1.64 ± 0.09
	2.00	1.89 ± 0.10	94.5%		3.00	4.34 ± 0.13	94.7%
	5.00	4.82 ± 0.18	96.4%		6.00	7.21 ± 0.12	95.2%

at 95% confidence ().
^bGB/T 5009.35-2003.
ND: not detected.