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 7

Regression equation, correlation coefficient, 𝑡-test concentration ranges, detection limits, and RSD% for TC-Au(III) and TC-Hg(II) complexes by HPLC.

Regr. eq.; 𝑌=𝐵𝑥+𝐴	Correlation coefficient (𝑟)	Linear range (µg/mL)	D.L. (µg/mL)	𝑡-tests statistic (calculated)	Tabulated 𝑡-test two tailed 95% C.I.	RSD%; (𝑛=4)	Rec.%
TC-Au(III) complex
𝑌=5.1985𝑥+0.8569	0.9986	10–150	2.647	1.2864	2.365	1.2339	101.777
TC-Hg(II) complex
𝑌=4.8418𝑥−0.1885	0.9997	10–150	2.532	1.4720	2.365	1.0733	102.000