By J Martinez-Calatayu
A severe evaluation of released papers, this quantity offers theoretical and primary features of FIA-pharmaceutical analyses. Dividing the cloth into chapters in line with dimension procedure or form of detector, every one bankruptcy offers
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Extra info for Flow Injection Analysis of Pharmaceuticals: Automation in the Laboratory
Example text
If the flow is stopped when the sample reaches the detector, then the signal obtained will be informative of the rate of the chemical reaction involved; because the sample is at rest, its dispersion will be virtually zero. g. one with several, serially arranged identical detectors, or one with a single detector where the sample is passed several times through it). The most immediate way of obtaining reaction rate data is by stopping the flow with the sample at the flow-cell. This produces a signal whose initial portion is identical to that of a typical FIA recording; however, the signal increases in a linear fashion after the maximum.
The definition admits a few additional considerations. Thus, FIA is not a chromatography, but nor is it many other things. There is no reference to the frequent use of heterogeneous (liquid-liquid, solid-liquid and gas-liquid) systems. g. determinations of complex stoichiometries or calculations of stability or extraction constants) are excluded, and so are FIA systems including a diode array detector, which provides qualitative information as well. Fang’s definition also excludes kinetic applications of FIA.
The concentration can be defined in two ways: where q is the tube cross-sectional area; U and C the instantaneous velocity and concentration of the solute; and F the flow-rate. While both are average concentrations, the latter is corrected in the instantaneous velocity. The numerical value for Cb in the numerator’s integral is the amount of solute that passes through the detector during a second. The two concepts are different and can give rise to different values. The concentration Cb is proportional to the amount of solute that travels through the detector during a second; the integral with respect to time will thus be proportional to the overall amount of solute that passes through the detector.
