Determination of Tetracycline and Fluoroquinolone Antibiotics at Trace Levels in Sludge and Soil

Table 3

Validation parameters: linearity, limits of detection and quantification (MDL and MQL), recoveries (), and precision (relative standard deviation, RSD) in soil and sludge.

Compounds	Linearity ()		MDL; (ng/g)		MQL; (ng/g)		(%)		Intraday precision; RSD (%)		Interday precision; RSD (%)
	Soil; 1–200 ng/g	Sludge; 5–2500 ng/g	Soil	Sludge	Soil	Sludge	Soil	Sludge	Soil	Sludge	Soil	Sludge
Norfloxacin	0.9956	0.9906	0.7	3.8	1.1	12.7	96.6	91.4	1.2	15.0		16.5
Ciprofloxacin	0.9869	0.9911	1.4	6	4.6	20.0	92.6	87.1	1.2	13.1		8.0
Ofloxacin	0.9947	0.9941	0.4	1.5	1.3	5.0	96.9	89.8	7.0	11.0		2.8
Tetracycline	0.9948	0.9917	0.3	2.4	1.9	6.2	38.9	41.7	14.7	1.9		6.7
Oxytetracycline	0.9970	0.9968	0.7	6	2.3	20.0	25.4	33.5	4.7	5.4		15.1