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Extraction and Analysis of Strontium in Water Sample Using a Sr (2+) Selective Polymer as the Absorbent Phase.

Ying R - Int J Anal Chem (2015)

Bottom Line: Foreign ions were examined to observe their effects on the absorption behavior of Sr(2+).The correlation coefficient was found to be 0.9947.We propose that this method effectively extracts strontium ion from environmental water samples.

View Article: PubMed Central - PubMed

Affiliation: College of Chemistry and Chemical Engineering, Linyi University, Linyi 276005, China.

ABSTRACT
A kind of Sr(2+) selective resin was applied as an absorption phase to extract Sr(2+) ion from an aqueous solution, and the amount of Sr(2+) was determined using inductively coupled plasma optical emission spectrometer. Factors, including absorption time, temperature, stirring rate, salt-out effect, desorption, and the pH of the aqueous solution, were investigated to optimize the absorption efficiency of Sr(2+). Foreign ions were examined to observe their effects on the absorption behavior of Sr(2+). The optimum condition was absorption time at 20 min, pH of aqueous solution 7, temperature of 35°C, and 600 rpm stirring rate. A 10 mL solution of 0.1 mol/L HCl is used as the desorption agent. The linear range of Sr(2+) concentrations from 50 to 1200 μg/L was investigated with the slope of 183 μg/L. The limit of detection was 21 μg/L with 4.23% relative standard deviation. The correlation coefficient was found to be 0.9947. Under the optimized conditions, the concentrations of Sr(2+) in four water samples were detected by the developed method. We propose that this method effectively extracts strontium ion from environmental water samples.

No MeSH data available.


Related in: MedlinePlus

Effect of pH on the extraction efficiency (Q) of Sr2+. Extraction conditions: absorption time 20 min, 35°C, and stirring rate 600 rpm.
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fig2: Effect of pH on the extraction efficiency (Q) of Sr2+. Extraction conditions: absorption time 20 min, 35°C, and stirring rate 600 rpm.

Mentions: Solution pH has been found to influence complex formation of metal ions and the hydrolysis of cations [19], so pH was varied from 1 to 7 to test the absorption efficiency of Sr2+. When the pH ranges from 8 to 14, some ions would precipitate out of solution; thus, basic solutions were not considered for tests. The pH was adjusted with a solution of HCl solution. In Figure 2, it shows that the maximum efficiency for Sr2+ absorption is achieved at pH 6 and 7. At low pH, efficiency is poor because of hydrogen bonding with the polymer, which reduces the bonding availability for strontium ions. For subsequent experiments, a pH of 7 was employed.


Extraction and Analysis of Strontium in Water Sample Using a Sr (2+) Selective Polymer as the Absorbent Phase.

Ying R - Int J Anal Chem (2015)

Effect of pH on the extraction efficiency (Q) of Sr2+. Extraction conditions: absorption time 20 min, 35°C, and stirring rate 600 rpm.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4660021&req=5

fig2: Effect of pH on the extraction efficiency (Q) of Sr2+. Extraction conditions: absorption time 20 min, 35°C, and stirring rate 600 rpm.
Mentions: Solution pH has been found to influence complex formation of metal ions and the hydrolysis of cations [19], so pH was varied from 1 to 7 to test the absorption efficiency of Sr2+. When the pH ranges from 8 to 14, some ions would precipitate out of solution; thus, basic solutions were not considered for tests. The pH was adjusted with a solution of HCl solution. In Figure 2, it shows that the maximum efficiency for Sr2+ absorption is achieved at pH 6 and 7. At low pH, efficiency is poor because of hydrogen bonding with the polymer, which reduces the bonding availability for strontium ions. For subsequent experiments, a pH of 7 was employed.

Bottom Line: Foreign ions were examined to observe their effects on the absorption behavior of Sr(2+).The correlation coefficient was found to be 0.9947.We propose that this method effectively extracts strontium ion from environmental water samples.

View Article: PubMed Central - PubMed

Affiliation: College of Chemistry and Chemical Engineering, Linyi University, Linyi 276005, China.

ABSTRACT
A kind of Sr(2+) selective resin was applied as an absorption phase to extract Sr(2+) ion from an aqueous solution, and the amount of Sr(2+) was determined using inductively coupled plasma optical emission spectrometer. Factors, including absorption time, temperature, stirring rate, salt-out effect, desorption, and the pH of the aqueous solution, were investigated to optimize the absorption efficiency of Sr(2+). Foreign ions were examined to observe their effects on the absorption behavior of Sr(2+). The optimum condition was absorption time at 20 min, pH of aqueous solution 7, temperature of 35°C, and 600 rpm stirring rate. A 10 mL solution of 0.1 mol/L HCl is used as the desorption agent. The linear range of Sr(2+) concentrations from 50 to 1200 μg/L was investigated with the slope of 183 μg/L. The limit of detection was 21 μg/L with 4.23% relative standard deviation. The correlation coefficient was found to be 0.9947. Under the optimized conditions, the concentrations of Sr(2+) in four water samples were detected by the developed method. We propose that this method effectively extracts strontium ion from environmental water samples.

No MeSH data available.


Related in: MedlinePlus