Determination of Picogram Levels of Roxithromycin in Pharmaceutical, Human Serum, and Urine by Flow-Injection Chemiluminescence

Table 3

Results of determination for ROX in spiked human serum.

Sample no.	Added (pg mL^−1)	Found (pg mL^−1)	RSD (%)	Recovery (%)	ROX content (μg mL^−1); Sample/spiked
1	0	21.3	2.9	96.5	21.0/20.0
	20.0	40.6	5.0
2	0	23.7	2.7	94.7	22.9/24.0
	30.0	52.1	3.3
3	0	29.4	4.9	102.0	29.7/30.0
	30.0	60.0	2.3