Print version ISSN 0100-4670
GUIMARAES, O. M. et al. Determination of carbon monoxide using a coated quartz crystal sensor. Eclet. Quím. [online]. 2006, vol.31, n.4, pp. 23-29. ISSN 0100-4670. http://dx.doi.org/10.1590/S0100-46702006000400003.
Carbon monoxide was detected and determined by a piezoelectric quartz crystal sensor coated with nickel(II)-phthalocyanine 50 % (v/v) solution in glycerine. Studies on the effect of temperature, flow rate, and some possible interferents were carried out. Calibration curves, sensor stability (lifetime) and the precision of measurements were also verified. The resulting selectivity is probably due to the coordinative binding between the electronically unsatured metal complexes and the analyte. The analytical curve is linear in the concentration range 0.10 to 1.0 % (v/v).
Keywords : carbon monoxide; piezoelectric sensor; phthalocyanine nickel(II); quartz crystal.