Trace determination of 4-chlorophenole from seawater samples by spectrophotometry after its molecularly imprinted polymer coated stir bar sorptive extraction

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HASHEMI SAYYED HOSSEIN; KAYKHAII MASSOUD; najari Fahimeh; Monfaredzadeh Zahra

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Journal: Journal of Applied Research in Chemistry Year:2018 | Volume:12 | Issue:3 Page(s): 133-143

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Title

Trace determination of 4-chlorophenole from seawater samples by spectrophotometry after its molecularly imprinted polymer coated stir bar sorptive extraction

Author(s)

HASHEMI SAYYED HOSSEIN | KAYKHAII MASSOUD | najari Fahimeh | Monfaredzadeh Zahra | Issue Writer Certificate

Keywords

ChlorophenolsQ1

Molecularly imprinted on stir barQ1

SpectrophotometryQ1

Seawater analysisQ1

Chabahar BayQ1

Abstract

In this research, a novel molecularly imprinted polymer coated stir bar was employed to selectively extract 4-chlorophenol (4-CP) directly from seawater samples. Preparation of molecularly imprinted polymer was performed using vinyl pyridine polymer and 4-CP as template molecule. Stir bar was directly placed in seawater samples to adsorb the analyte, then was transferred to a glass vial containing 2. 5 mL of acetonitrile for analyte desorption. This solution was put in a micro cuvette of a spectrophotometer for 4-CP concentration determination against a blank solution at a wavelength of 292 nm. The effect of different parameters on the extraction efficiency of 4-CP were studied and optimized. Optimum conditions were established as: absorption and desorption times were fixed at 20 min, stirring rate was 500 rpm, pH was adjusted to 5. 5, concentration of added NaCl for standards was 0. 35 mol. l-1, and extraction process was performed at a temperature of 40 ° C. The linear range of calibration curve for 4-CP was 1. 0-80. 0 μ gl-1. Under the optimum conditions, for this analyte the detection limit was 0. 33 μ gl-1 with an enrichment factor of 97 folds. This method was successfully employed for the analysis of trace amounts of 4-CP in seawater of Chabahar Bay which was determined to be between 1. 5 to 2. 5 μ g. l-1. Reproducibility of the method (expressed as relative standard deviation) for ten replicate measurements of real samples was between 0. 69 and 5. 7%.

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APA: Copy

HASHEMI, SAYYED HOSSEIN, KAYKHAII, MASSOUD, najari, Fahimeh, & Monfaredzadeh, Zahra. (2018). Trace determination of 4-chlorophenole from seawater samples by spectrophotometry after its molecularly imprinted polymer coated stir bar sorptive extraction. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), 12(3 ), 133-143. SID. https://sid.ir/paper/396251/en

Vancouver: Copy

HASHEMI SAYYED HOSSEIN, KAYKHAII MASSOUD, najari Fahimeh, Monfaredzadeh Zahra. Trace determination of 4-chlorophenole from seawater samples by spectrophotometry after its molecularly imprinted polymer coated stir bar sorptive extraction. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)[Internet]. 2018;12(3 ):133-143. Available from: https://sid.ir/paper/396251/en

IEEE: Copy

SAYYED HOSSEIN HASHEMI, MASSOUD KAYKHAII, Fahimeh najari, and Zahra Monfaredzadeh, “Trace determination of 4-chlorophenole from seawater samples by spectrophotometry after its molecularly imprinted polymer coated stir bar sorptive extraction,” JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), vol. 12, no. 3 , pp. 133–143, 2018, [Online]. Available: https://sid.ir/paper/396251/en

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