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Paper Information

Journal:   JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)   fall 2018 , Volume 12 , Number 3 ; Page(s) 133 To 143.
 
Paper: 

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
 
* Department of Marine Chemistry, Faculty of Marine Science, Chabahar Maritime University, Chabahar
 
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%.
 
Keyword(s): Chlorophenols,Molecularly imprinted on stir bar,Spectrophotometry,Seawater analysis,Chabahar Bay
 
 
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APA: Copy

HASHEMI, S., & KAYKHAII, M., & najari, F., & Monfaredzadeh, Z. (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. https://www.sid.ir/en/journal/ViewPaper.aspx?id=667846



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). 2018 [cited 2021July26];12(3 ):133-143. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=667846



IEEE: Copy

HASHEMI, S., KAYKHAII, M., najari, F., Monfaredzadeh, Z., 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), [online] 12(3 ), pp.133-143. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=667846.



 
 
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