Membrane preconcentration of iron in seawater samples and on-site determination in spectrophotometry

Yuanzhen Peng; Dongxing Yuan; Yongming Huang; Tao Jiang; Baomin Liu

doi:10.1007/s00343-012-1096-9

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Membrane preconcentration of iron in seawater samples and on-site determination in spectrophotometry

Updated：2023-05-16

- Membrane preconcentration of iron in seawater samples and on-site determination in spectrophotometry
- Journal of Oceanology and Limnology Vol. 30, Issue 2, Pages: 315-320(2012)
- Affiliations：
  
  State Key Laboratory of Marine Environmental Science Environmental Science Research Center Xiamen University
- Author bio：
- Funds：
- DOI：10.1007/s00343-012-1096-9
  CLC：
- Online First：01 March 2012，
  
  Published：2012
- Accepted：
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Peng, Y., Yuan, D., Huang, Y. et al. Membrane preconcentration of iron in seawater samples and on-site determination in spectrophotometry., Chin. J. Ocean. Limnol. 30, 315–320 (2012). https://doi.org/10.1007/s00343-012-1096-9
DOI：

Peng, Y., Yuan, D., Huang, Y. et al. Membrane preconcentration of iron in seawater samples and on-site determination in spectrophotometry., Chin. J. Ocean. Limnol. 30, 315–320 (2012). https://doi.org/10.1007/s00343-012-1096-9 DOI：

摘要

Abstract

A novel method for on-site determination of trace iron was developed using membrane preconcentration and spectrophotometric detection. Fe(II)-ferrozine complex was reacted with cetyltrimethylammonium bromide (CTAB) to form a Fe(II)-ferrozine-CTAB paired compound

which was collected on a membrane by filtration under vacuum. The membrane was immersed in 2 mL of ethanol-nitric acid and the absorbance of the solution measured for quantitative analysis. Various factors affecting the iron collection and determination were investigated. With different sample preconcentration volumes

the range of determination was broadened to 0.5–120 μg/L. The detection limit of this method reached 0.19 μg/L and the recoveries were between 97.2 and 109% when the concentration enrichment was about 45. The relative standard deviation (n = 7) was 1.9% for samples containing 10 μg/L Fe. Twelve seawater samples were analyzed on-site using the proposed method

and two were also analyzed in inductively coupled plasma mass spectrometry. No significant difference was shown between the two methods by the Student’s t-test. The method has also been used on-site for iron enrichment experiments with phytoplankton and concluded to be simple

accurate and inexpensive.

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references

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