Uso da pressão gerada por uma coluna de água para controle da vazão em sistemas de análises em fluxo The use of pressure generated by a water column to control flow rates in flow analysis systems

• Main Authors: Wallans T. P. dos Santos, Marselha P. Ceolin, Yaico D. T. de Albuquerque, Eduardo M. Richter
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2007-01-01
• Series: Química Nova
• Subjects: flow rates control; water column; flow analysis
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000700044

<abstract language="eng">This work presents a new approach to control the flow rate in hydrodynamic flow experiments. The combination of air pressure generated by an aquarium air pump and the pressure generated by a water column were used for this purpose. This device supports a stable flow rate without pulsation for a long period of time. Furthermore, the flow rate can be easily controlled at various values in one or more streams. The performance of this approach was investigated using Fe(CN)6(4-) solutions in flowing systems using amperometric and voltammetric detection in wall-jet configuration. The results showed that the performance of the proposed device was better than a commercial peristaltic pump. It suggests that this approach can be used successfully in flow analysis systems.