Química Nova | |
Desenvolvimento de um dispositivo de baixo custo para medidas por quimiluminescência | |
Eduardo P. Borges2  Elizabeth N. Fernandes2  Fábio R. P. Rocha2  Boaventura F. Reis1  | |
[1] ,Universidade Federal de São Carlos Departamento de Química São Carlos SP | |
关键词: flow analysis; chemiluminescence; hydrogen peroxide; photodiode; | |
DOI : 10.1590/S0100-40422002000700021 | |
来源: SciELO | |
【 摘 要 】
A simple and low cost device (ca. US$ 150) that comprises two photodiodes fixed in lab-made Perspex flow cell is proposed for chemiluminescence measurements. The characteristics of the device (large observation window and reduced thickness) allow maximizing the amount of the emitted radiation detected. A sensitivity improvement of ca. 50 % was observed by employing two photodiodes for signal measurements. The performance of the device was assessed by the oxidation of luminol by hydrogen peroxide, yielding a linear response within the range of 2.50 to 500 µmol L-1 H2O2. The detection limit was estimated as 0.8 µmol L-1 hydrogen peroxide which is comparable with those obtained by using equipments based on photomultipliers.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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RO202005130061141ZK.pdf | 256KB | download |