Reagent [SILC] Taken µg mL-1 [SILC] Found* µg mL-1 % Recovery SD RSD (%)
BTB 20.00
30.00
40.00
20.00
30.30
40.20
100.0
101.0
100.5  
0.026
0.052
0.071
0.13
0.17
0.18
BPB 10.00
30.00
50.00
9.80
30.45
49.50  
98.00
101.50
99.00
0.034
0.063
0.041
0.35
0.20
0.08
EBBR 20.00
40.00
60.00
20.00
39.40
61.00
100.0
98.50
101.6
0.052
0.073
0.046
0.26
0.19
0.08
*Average of four determination
Table 2: Between–day precision for the determination of SILC drug using BTB, BPB and EBBR reagents.