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 5

Regression equation, correlation coefficient, 𝑡-test concentration ranges, detection limits, RSD%, and recovery (rec.%) for the determination of TC-Au(III) complex by FAAS.

Regr. eq.; 𝑌=𝐵𝑥+𝐴	Corr.; coefficient (𝑟)	Linear range; (µg/mL)	D.L. (µg/mL)	t-test statistic; (calcd)	Tabulated; t-test two tailed 95% C.I.	RSD%; (𝑛=4)	Rec.%
Direct method
𝑌=0.0520𝑥+0.0088	0.9967	5–30	0.0995	1.7603	2.571	1.054	104.753
Standard addition method
𝑌=00549𝑥+0.2791	0.9988	5–28		0.6569	2.571	3.253	95.639