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Separation, Preconcentration, and Determination of Lead, Cadmium, and Iron Using Cloud Point Extraction with Flame Atomic Absorption Spectrometry
Abstract
The concentration of heavy metals in drinking water is an important standard for water quality evaluation and water pipeline corrosion detection. This research reports the development of a new method based on cloud point extraction for the separation, preconcentration, and detection of lead (Pb), cadmium (Cd), and iron (Fe) using flame atomic absorption spectrometry. This method was used because the concentration of metallic trace elements in the samples was lower than the limits of detection (LOD). The experimental LODs for Pb, Cd, and Fe, were 0.01, 0.01, and 0.3 ppm respectively, which were determined based on a significant sensitivity change in the slope of the standard curve. By using both 2,6-diamino-4-phenyl-1,3,5-triazine and 3-amino-7-dimethylamino-2-methylphenazine (Neutral Red) as chelating agents, and Triton X-114 as a surfactant, these metallic elements were enriched in water samples. The preconcentration procedure was optimized by varying the experimental factors such as temperature, equilibrium time, pH, and the concentration of the chelates and surfactant. After optimization, this method allowed the determination of these three trace elements with 20-times lower LODs and yielded recoveries of 99.8, 97.3, and 99.3% for Pb, Cd, and Fe, respectively.
About the Authors
Zh. Li
School of Biology and Environment, Nanjing Polytechnic Institute
China
China
Nanjing
Y. Zhang
School of Biology and Environment, Nanjing Polytechnic Institute
China
China
Nanjing
R. Wang
School of Biology and Environment, Nanjing Polytechnic Institute
China
China
Nanjing
D. Jiang
School of Biology and Environment, Nanjing Polytechnic Institute
China
China
Nanjing
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Review
For citations:
Li Zh., Zhang Y., Wang R., Jiang D. Separation, Preconcentration, and Determination of Lead, Cadmium, and Iron Using Cloud Point Extraction with Flame Atomic Absorption Spectrometry. Zhurnal Prikladnoii Spektroskopii. 2022;89(2):289.
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