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Determination of Manganese in Water Samples by Cloud Point Extraction with MN-CCA-CPC Flame Atomic Absorption Spectrometry |
CHEN Zhuo1, SU Yu-qing2, SONG Shan1, YAO Jun-xue1* |
1. School of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot 010021, China
2. Inner Mongolia Wulanchabu Food and Drug Administration, Wulanchabu 012000, China |
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Abstract In this work, a simple and novel cloud point extraction (CPE) method for the separation and preconcentration of manganese in aquatic environment was developed and combined with flame atomic absorption spectrometry (FAAS). Manganese was formed a complex with Calcon carboxylic acid (CCA) in the presence of Cetyl pyridinium chloride (CPC) and Triton X-114. The main factors affected the CPE, such as pH, the dosage of Triton X-114, CCA, CPC, NaCl, coexisting ions, and the heating time and heating temperature. After optimization of the experimental conditions, the system of Mn-CCA-CPC was able to overcome the matrix interference and showed the significant effect of separation of enrichment. The precision of the method was 0.39% and the limit of detection was 0.27 μg·L-1 of Mn. The results of the determination of manganese content in tap water and groundwater were 33.5 and 64.5 μg·L-1, which was in line with the international standards, so the method can be successfully applied for the determination of manganese in the water environment.
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Received: 2017-09-19
Accepted: 2018-01-12
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Corresponding Authors:
YAO Jun-xue
E-mail: jxyao108@sohu.com
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