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

Table 4

Results of determination for ROX in spiked human urine.

Sample no.	Added (pg mL^−1)	Found (pg mL^−1)	RSD (%)	Recovery (%)	ROX content (μg mL^−1); Sample/spiked
1	0	4.3	1.8	96.7	4.2/4.5
	3.0	7.2	2.5
2	0	9.8	2.9	90.0	9.6/10.0
	3.0	12.5	2.2
3	0	35.8	2.3	102.0	36.0/36.2
	20.0	56.2	1.9
4	0	20.8	2.1	98.0	20.7/21.0
	10.0	30.6	3.0