Determination of Tetracycline in Pharmaceutical Preparation by Molecular and Atomic Absorption Spectrophotometry and High Performance Liquid Chromatography via Complex Formation with Au(III) and Hg(II) Ions in Solutions

Table 8

Relative percentage error for determination of TC-Au(III) and TC-Hg(II) complexes by HPLC direct method.

Complex	State of drug	Stated concentration; (mg/unit)	Found; (mg/unit)	% Erel.
TC-Au(III)	Capsule	250	254.4425	+1.777
TC-Hg(II)	Capsule	250	255.000	+2.000