Research Article

Flow Injection Potentiometric Assay of Hexoprenaline in Its Pure State, Pharmaceutical Preparations, and Biological Samples

Table 5

Determination of hexoprenaline in plasma and urine employing the different Hx-PTA and Hx-PMA electrodes under FIA conditions.

UrinePlasma

Taken5.186 mg51.860 mg518.600 mg5.186 mg51.860 mg518.600 mg

R e c o v e r y A BABABABABAB
Hx-PTA (I)85.398.288.699.590.5100.484.699.787.6100.295.4100.8
Hx-PTA (II) 84.198.389.1100.392.3100.785.298.586.9101.496.899.7
Hx-PTA (III)83.798.788.298.994.3101.283.2100.888.9100.597.0102.6
Hx-PTA (IV)84.299.289.4100.595.499.983.9100.090.1100.995.5101.5
Hx-PTA (V)85.498.492.3101.293.898.984.7101.295.4100.492.8100.7
Hx-PMA (I)86.399.990.1100.396.2100.283.9100.793.199.997.499.6
Hx-PMA (II)83.7100.289.998.694.799.686.199.689.8100.196.198.9
Hx-PMA (III)84.6100.593.2100.893.8101.388.698.590.799.895.4100.0
Hx-PMA (IV)88.098.691.6102.196.5100.585.9100.492.3101.393.8101.4
Hx-PMA (V)86.999.390.4101.397.0100.286.2100.994.3100.295.3100.6

A: recovery at optimum flow rate (7.50 mL/min for conventional electrodes, 5.35 mL/min for coated wire electrodes).
B: recovery at flow rate 2.50 mL/min.
A v e r a g e of three determinations.