Research Article
Flow Injection Potentiometric Assay of Hexoprenaline in Its Pure State, Pharmaceutical Preparations, and Biological Samples
Table 2
Variation of the slopes of the calibration graphs (mV/concentration decade) with flow rate.
| | Flow rate | 4.15 | 5.35 | 7.50 | 9.70 | 12.50 | 17.85 | 23.25 | 25.00 | 27.00 | 30.00 |
| | Electrode | Slope
(mV/ concentration decade) |
| | Hx-PTA (I) | 63.1 | 64.5 | | 68.2 | 69.7 | 72.4 | 75.4 | 75.9 | 76.3 | 77.0 | | Hx-PTA (II) | 61.0 | | 62.7 | 64.5 | 66.8 | 68.2 | 69.6 | 70.4 | 71.2 | 72.6 | | Hx-PTA (III) | 62.5 | | 64.9 | 65.8 | 66.3 | 67.2 | 68.4 | 69.3 | 70.3 | 71.2 | | Hx-PTA (IV) | 61.5 | | 63.5 | 64.9 | 66.7 | 67.3 | 68.2 | 69.0 | 69.2 | 70.3 | | Hx-PTA (V) | 63.3 | | 66.2 | 67.5 | 68.3 | 69.7 | 70.4 | 71.2 | 71.9 | 72.3 | | Hx-PTA (I) | 59.7 | 60.4 | | 63.0 | 64.7 | 66.2 | 67.1 | 67.8 | 68.0 | 69.3 | | Hx-PTA (II) | 61.4 | | 64.5 | 65.7 | 67.1 | 68.4 | 69.5 | 69.8 | 70.2 | 70.7 | | Hx-PTA (III) | 62.5 | | 64.6 | 65.9 | 67.2 | 68.3 | 69.8 | 70.3 | 70.9 | 70.6 | | Hx-PTA (IV) | 61.3 | | 63.5 | 65.0 | 66.2 | 67.8 | 68.9 | 70.4 | 71.5 | 73.0 | | Hx-PTA (V) | 62.0 | | 63.9 | 65.7 | 66.8 | 68.1 | 69.2 | 70.3 | 70.9 | 71.6 |
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at flow rate selected as optimum working condition.
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