A micro-flow-batch analyzer using webcam for spectrophotometric determination of Ortho-phosphate and aluminium(III) in tap water

In this work, a micro-flow-batch analyzer (µFBA) using webcam for spectrophotometric determination of ortho-phosphate and aluminium(III) in tap water is proposed. PO4(3-) and Al3+ determinations were performed by employing molybdenum blue and quecertin methods, respectively. In order to build linear analytical curves, a mathematical model was used on the basis of the RGB (red, green and blue) values. Working ranges were from 25 to 500 µg L-1 for both analytes with estimated limits of detection, relative standard deviation (RSD, n = 5) and sampling rate of 0.82 µg L-1, < 0.8% and 160 h-1 for PO4(3-), and 0.93 µg L-1, < 1.1% and 160 h-1 for Al(III). Comparing with the reference methods, no statistically significant differences were observed when applying the paired t-test at a 95% confidence level. Recovery study shows results between 98.1 and 102.8%. The proposed µFBA presented satisfactory portability, robustness, flexibility, low-cost device and reduced chemicals consumption.

Bibliographic Details

Main Authors:	Lima,Marcelo B., Andrade,Stéfani I. E., Silva Neta,Maria S., Barreto,Inakã S., Almeida,Luciano F., Araújo,Mário César U.
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 2014
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000500013
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