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 1

Optimum experimental conditions for TC. HCl complexes with Au(III) and Hg(II) ions.

Complex	Ion conc. (µg/mL)	pH	Heating temp. (°C)	Heating time (min.)	Phase ratio; (EA : aq)	Extraction time (min.)	Extraction% (E%)	Distribution; ratio
TC-Au	10	4	75	15	1 : 5	1	95.242	100.196
TC-Hg	15	2–4	75	15	1 : 5	1-2	95.335	102.181