DETERMINATION OF LEAD WITH A CARBON PASTE ELECTRODE MODIFIED WITH CHITOSAN
In our country, extreme cold weather during the winter season causes bees to die and are discarded into the environment. Chitosan (AmCS) derived from dead Apis mellifera bees is an environmentally sound solution because this process helps recycle waste. This article presents the preparation and electrochemical application of a carbon paste sensor modified with AmCS, a local raw material, for the determination of Pb(II) ions in water by inversion voltammetric method. Experimental parameters, the effect of background electrolyte, pH effect, and time of accumulation on the electrode surface were studied. The best results were observed with an electrode composed of 60% (m/m) graphite powder, 20% (m/m) chitosan, and 20% (m/m) mineral oil, at pH 6.5, 0.1 mol/l NaNO3 background electrolyte, Pb(II) concentration potential of -430 mV, and time of 120 seconds. A water sample was analyzed using the proposed sensor and compared with neutral methods.
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