Crison Compact system

Crison Compact system [34]. A similar system has been used for the sequential determination of chloride and fluoride [35]. The two systems are arranged differently owing to the disparate responsiveness of their electrodes. Thus, while the chloride and fluoride electrode provide a rapid response, the glass electrode is slow especially in response to pH in low-buffered water. For this reason, the system for the sequential determination of chloride and fluoride has both electrodes inserted in the same channel in order to simultaneously obtain their responses. The sole precaution to be adopted here is that the buffer used to adjust the ionic strength and pH of fluoride (TISAB) should contain KNO3 instead of NaCl. 

Figure 5.17 shows an SIA system for the AAS determination of iron by preconcentration of the metal on a Chelex 100 column and elution with nitric acid [5]. The system uses a Crison Compact titrator to operate both burettes in such a way that the nebulizer will continuously receive liquid at a constant flow-rate. Another interesting example of coupling ASS detection and flow techniques is a multisyringe flow injection analysis (MSFIA) system with cold-vapor AAS developed to determine mercury [6]. 

Crison COMPACT SIA system with two burettes, one switching valve, two analog inputs, one stirrer and one sampler... 

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See also in sourсe #XX -- [ ]

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