3.4. Real water samples analysis
The proposed method was applied to the determination of lead, cadmium and zinc tap water, sea water (Quintero) and mineral water (Puyehue, Liv, Chanqueahue). Dissolved organic matter present in seawater could interfere with the determination of trace metals by AdSV due to competition with the added ligand for the metal, this effect was eliminated by ultraviolet irradiation [19]. For quantization of cadmium and lead in water samples, a volume of 9.0 mL was analyzed, while for zinc determination an inferior volume was necessary. Three replicate analyses were performed for each sample. Cd(II) was not detected in any of these samples. Fortunately in our country this ion is present in very low concentrations. To check the reliability of the method the samples were analyzed by ICP–AES, but the results obtained with this technique for cadmium were below 5.0 μg L−1. The results are given in Table 1.
3.4. Real water samples analysisThe proposed method was applied to the determination of lead, cadmium and zinc tap water, sea water (Quintero) and mineral water (Puyehue, Liv, Chanqueahue). Dissolved organic matter present in seawater could interfere with the determination of trace metals by AdSV due to competition with the added ligand for the metal, this effect was eliminated by ultraviolet irradiation [19]. For quantization of cadmium and lead in water samples, a volume of 9.0 mL was analyzed, while for zinc determination an inferior volume was necessary. Three replicate analyses were performed for each sample. Cd(II) was not detected in any of these samples. Fortunately in our country this ion is present in very low concentrations. To check the reliability of the method the samples were analyzed by ICP–AES, but the results obtained with this technique for cadmium were below 5.0 μg L−1. The results are given in Table 1.
การแปล กรุณารอสักครู่..
