Table 1.

Standard curves for determination of Sudan red compounds in ethanol and pH 7.0 phosphate buffer solution (PBS)

Chemical	Upper limit, nM	Wave- length, nm	Medium	Linear equations	Linear correlation coefficient
Sudan II	40	495	ethanol	A = 0.0155CL (2)	0.9982
Sudan II	1.2	495	PBS *	A = 0.0121CL - 0.001 (3)	0.9993
Sudan IV	0.6	515	ethanol	A = 0.0318CL - 0.0018 (4)	0.9990
Sudan IV	5	515	PBS	A = 0.0196CL- 0.0007 (5)	0.9990