A versatile and pulsation free pneumatic impeller for flow analysis systems

被引：25

作者：

Matos, RC ^{[1
]}

Gutz, IGR

Angnes, L

Fontenele, RS

Pedrotti, JJ

机构：

[1] Univ Sao Paulo, Inst Quim, Sao Paulo, Brazil

[2] Univ Presbiteriana Mackenzie, Dept Quim, BR-01239902 Sao Paulo, Brazil

来源：

QUIMICA NOVA | 2001年 / 24卷 / 06期

关键词：

pneumatic pump; flow analysis; amperometric detection;

D O I：

10.1590/S0100-40422001000600017

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aquarium air pumps are proposed and evaluated as pneumatic liquid propulsion devices for flow injection and continuos flow analysis (FIA and CFA) systems. This kind of pump is widely available at a very low cost and it can sustain a pressure around of 4 psi (0.28 bar) indefinitely. By applying this air pressure onto a solution contained in a reservoir flask, it is possible to reach flow rates of up to 12.5 mL min(-1) for circuits comprising reactors, made from 0.8 i.d. tubing with a length of 100 cm. The precise adjustment of flow rate below the maximum one can be made with a simplified needle valve or inserting in series a short length of capillary tube. The absence of flow pulsation is a definite advantage in comparison with peristaltic pumps, especially when amperometric detection is elected, as confirmed experimentally in FIA and CF applications.

引用

页码：795 / 798

页数：4

共 17 条

[1] A robust multisyringe system for process flow analysis -: Part I.: On-line dilution and single point titration of protolytes [J].