Table 3. . Process efficiency, extraction recovery and matrix effect of paracetamol in plasma (n = 3 for each condition).

Nominal concentration (mg/l)	Process efficiency mean accuracy (%)	Extraction recovery mean accuracy (%)	Matrix effect mean accuracy (%)
0.125	101	95	106
0.25	101	110	92
5	114	108	106
30	101	109	93
Average	104	106	99