Drug

Recovery Level

(%)

Initial Amount

(ng/band )

Amount Found

(ng/band)

% Recovery

% RSD

NAC

80

120

119.84

99.88

0.112

100

150

149.96

99.97

120

180

180.19

100.10

TAU

80

400

399.68

99.92

0.135

100

500

499.79

99.95

120

600

600.98

100.17