Chemistry Reference
In-Depth Information
In SPMS-MC implementation, the potentiality offered by the easy reconfiguration of the systems (just by
software), makes the SPMS concept an attractive, interesting and cost effective analytical tool from a GAC
point of view, able to solve real analytical problems.
It is worth to mention the GAC potential of multi-determinations by flow-SPMS without using derivative
reagents and the different single ways to perform strategies. Nevertheless, we must also mention the drawback
related with these systems when applied to complex sample matrices. In these cases, high matrix effects and
significant sensitivity decreases are expected [70]. On the other hand, it has to be considered the disadvantage
of deactivation of the sensing surface with repeated use, so needing replacement of the solid support in the
cell from time to time. This deactivation is more quickly observed when analyzing complex samples. The
implementation SPMS-BIS overcomes this problem, while for samples such as waters or active principles in
pharmaceuticals, flow SPMS is more robust and of practical cost-effective use. Finally, Figure 12.8 shows a
schematic comparison of the gradual approximation to GAC concept of the most significant SPMS
methodologies presented in this chapter, summarizing, besides, the respective more relevant features of these
methodologies which contribute to the development of GAC methods.
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