Ion Suppression Study for Tetracyclines in Feed

Table 3

Variation (RSD %) between the five different studied feed samples processed with the four different sample pretreatment methods at 1 mg L⁻¹.

	Method
	1; RSD (%)	2; RSD (%)	3; RSD (%)	4; RSD (%)
TC	12.3	19.4	11.1	2.6
CTC	17.9	25.8	12.3	21.1
DC	30.8	39.7	4.9	6.5
OTC	14.7	24.3	9.4	8.6