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 2

Stability constant (𝑘) and molar absorptivity for TC-Au(III) and TC-Hg(II) complexes in solutions.

Complex	ε max; (L·mol^−1·cm^−1)	Stability constant (𝑘) (M^−1)	λ max (nm)
TC-Au(III)	3.4820 × 10^3	2.5187 × 10^4	425
TC-Hg(II)	6.9656 × 10^3	1.6122 × 10^5	320