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.
Urine
Plasma
Taken
5.186 mg
51.860 mg
518.600 mg
5.186 mg
51.860 mg
518.600 mg
A
B
A
B
A
B
A
B
A
B
A
B
Hx-PTA (I)
85.3
98.2
88.6
99.5
90.5
100.4
84.6
99.7
87.6
100.2
95.4
100.8
Hx-PTA (II)
84.1
98.3
89.1
100.3
92.3
100.7
85.2
98.5
86.9
101.4
96.8
99.7
Hx-PTA (III)
83.7
98.7
88.2
98.9
94.3
101.2
83.2
100.8
88.9
100.5
97.0
102.6
Hx-PTA (IV)
84.2
99.2
89.4
100.5
95.4
99.9
83.9
100.0
90.1
100.9
95.5
101.5
Hx-PTA (V)
85.4
98.4
92.3
101.2
93.8
98.9
84.7
101.2
95.4
100.4
92.8
100.7
Hx-PMA (I)
86.3
99.9
90.1
100.3
96.2
100.2
83.9
100.7
93.1
99.9
97.4
99.6
Hx-PMA (II)
83.7
100.2
89.9
98.6
94.7
99.6
86.1
99.6
89.8
100.1
96.1
98.9
Hx-PMA (III)
84.6
100.5
93.2
100.8
93.8
101.3
88.6
98.5
90.7
99.8
95.4
100.0
Hx-PMA (IV)
88.0
98.6
91.6
102.1
96.5
100.5
85.9
100.4
92.3
101.3
93.8
101.4
Hx-PMA (V)
86.9
99.3
90.4
101.3
97.0
100.2
86.2
100.9
94.3
100.2
95.3
100.6
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. of three determinations.