اندازه گيري الكتروشيميايي بيس فنول آ با استفاده از الكترود خمير كربن اصلاح شده با آدنين و نانولوله هاي كربني

Electrochemical Determination of Bisphenol A at Adenine and Carbon Nanotubes Modified Carbon Paste Electrode

زﻣﯿﻨﻪ و ﻫﺪف: ﺑﯿﺲ ﻓﻨﻮل آ، ﺑﻪﻋﻨﻮان ﺟﺰء اﺻﻠﯽ ﭘﻠﯽﮐﺮﺑﻨﺎتﻫﺎ و رزﯾﻦﻫﺎي اﭘﻮﮐﺴﯽ ﺑﻪﻃﻮر ﮔﺴﺘﺮدهاي در ﺻﻨﻌﺖ ﭘﻼﺳﺘﯿﮏ ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار ﻣﯽﮔﯿﺮد. اﯾﻦ ﺗﺮﮐﯿﺐ، ﯾﮏ ﻣﺨﺘﻞﮐﻨﻨﺪهي ﺷﻨﺎﺧﺘﻪ ﺷﺪهي ﻏﺪد درونرﯾﺰ اﺳﺖ ﮐﻪ ﻣﯽﺗﻮاﻧﺪ در ﻋﻤﻠﮑﺮد ﻫﻮرﻣﻮﻧﯽ ﻃﺒﯿﻌﯽ اﻧﺴﺎنﻫﺎ و ﺳﺎﯾﺮ ﺟﺎﻧﺪاران ﻣﺪاﺧﻠﻪ ﮐﻨﺪ و در ﻧﺘﯿﺠﻪ ﺗﻬﺪﯾﺪ ﺑﺎﻟﻘﻮهاي ﺑﺮاي ﺳﻼﻣﺖ اﻧﺴﺎنﻫﺎ و ﻣﺤﯿﻂ زﯾﺴﺖ ﺑﻪﺷﻤﺎر ﻣﯽآﯾﺪ. ﭘﻠﯽﮐﺮﺑﻨﺎتﻫﺎ و رزﯾﻦﻫﺎي اﭘﻮﮐﺴﯽ ﺣﺎوي ﺑﯿﺲ ﻓﻨﻮل آ ﺑﻪﻃﻮر ﻣﻌﻤﻮل ﺑﺮاي ﺗﻮﻟﯿﺪ ﺷﯿﺸﻪﻫﺎي ﺷﯿﺮ ﮐﻮدﮐﺎن، ﻇﺮوف ﻧﮕﻪدارﻧﺪهي ﻣﻮاد ﻏﺬاﯾﯽ و ﺑﻄﺮيﻫﺎي ﻧﻮﺷﯿﺪﻧﯽﻫﺎ ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار ﻣﯽﮔﯿﺮﻧﺪ؛ ﺑﻪاﯾﻦﺗﺮﺗﯿﺐ ﺑﯿﺲ ﻓﻨﻮل آ اﻣﮑﺎن ورود ﺑﻪ ﻏﺬا و ﻣﺤﯿﻂ زﯾﺴﺖ را ﭘﯿﺪا ﻣﯽﮐﻨﺪ؛ ﺑﻨﺎﺑﺮاﯾﻦ، ﯾﺎﻓﺘﻦ ﯾﮏ روش آﻧﺎﻟﯿﺘﯿﮑﯽ ﺳﺎده و ﺑﺎ ﺣﺴﺎﺳﯿﺖ ﺑﺎﻻ ﺑﺮاي اﻧﺪازهﮔﯿﺮي ﻣﯿﺰان ﺑﯿﺲ ﻓﻨﻮل آ اﻫﻤﯿﺖ ﺑﺴﺰاﯾﯽ دارد. روش ﺑﺮرﺳﯽ: در اﯾﻦ ﭘﮋوﻫﺶ، ﯾﮏ ﺣﺲﮔﺮ اﻟﮑﺘﺮوﺷﯿﻤﯿﺎﯾﯽ ﺑﺮ ﭘﺎﯾﻪي اﻟﮑﺘﺮود ﺧﻤﯿﺮ ﮐﺮﺑﻦ اﺻﻼحﺷﺪه ﺑﺎ آدﻧﯿﻦ و ﻧﺎﻧﻮﻟﻮﻟﻪﻫﺎي ﮐﺮﺑﻨﯽ )Adenine/CNT/CPE( ﺑﺮاي اﻧﺪازهﮔﯿﺮي ﺑﯿﺲ ﻓﻨﻮل آ اراﯾﻪ ﺷﺪ. ﯾﺎﻓﺘﻪﻫﺎ: ﻧﺘﺎﯾﺞ ﺑﻪدﺳﺖ آﻣﺪه ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ اﻟﮑﺘﺮود اﺻﻼحﺷﺪهي ﺑﻪﮐﺎر رﻓﺘﻪ در اﯾﻦ ﭘﮋوﻫﺶ، ﻓﻌﺎﻟﯿﺖ ﮐﺎﺗﺎﻟﯿﺘﯿﮑﯽ ﻗﻮي ﻧﺴﺒﺖ ﺑﻪ اﮐﺴﺎﯾﺶ ﺑﯿﺲ ﻓﻨﻮل آ داﺷﺘﻪ اﺳﺖ؛ ﻫﻤﭽﻨﯿﻦ اﺳﺘﻔﺎده از آدﻧﯿﻦ و ﻧﺎﻧﻮﻟﻮﻟﻪﻫﺎي ﮐﺮﺑﻨﯽ در ﭘﯿﮑﺮهي اﻟﮑﺘﺮود ﺧﻤﯿﺮ ﮐﺮﺑﻦ، ﺳﺒﺐ ﮐﺎﻫﺶ ﻣﻘﺎوﻣـﺖ در ﺑﺮاﺑـﺮ اﻧﺘﻘﺎل اﻟﮑﺘﺮون و اﻓﺰاﯾﺶ ﭼﺸﻢﮔﯿﺮ ﻧﺮخ اﻧﺘﻘﺎل اﻟﮑﺘﺮون ﮔﺸﺘﻪ اﺳﺖ. ﺑﺤﺚ و ﻧﺘﯿﺠﻪﮔﯿﺮي: ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﯾﺞ، ﻧﻮع اﺻﻼحﮐﻨﻨﺪهي ﻣﻮرد اﺳﺘﻔﺎده ﺗﺄﺛﯿﺮ ﺑﺴﺰاﯾﯽ در ﻣﯿﺰان ﺣﺴﺎﺳﯿﺖ و ﮔﺰﯾﻨﺶﭘﺬﯾﺮي ﺳـﻨﺠﺶ ﺑـﯿﺲ ﻓﻨﻮل آ دارد؛ ﺑﻨﺎﺑﺮاﯾﻦ ﯾﺎﻓﺘﻦ ﻋﻨﺎﺻﺮ ﺳﻨﺠﺶ ﺑﺎ ﭘﺎﯾﺪاري ﺑﺎﻻ، ﻓﻌﺎﻟﯿﺖ ﮐﺎﺗﺎﻟﯿﺘﯿﮑﯽ ﻣﻄﻠﻮب و رﺳﺎﻧﺎﯾﯽ ﻣﻨﺎﺳـﺐ ، ﻣـﯽ ﺗﻮاﻧـﺪ ﻓﺮآﯾﻨـﺪ اﻧـﺪازه ﮔﯿـﺮي اﯾﻦ ﺗﺮﮐﯿﺐ را ﺑﻬﺒﻮد ﺑﺨﺸﺪ.

Background: Bisphenol A (BPA), as a major component of polycarbonate and epoxy resins is widely used in the plastic industry. This compound is a well-known endocrine disruptor that can interfere with the normal, hormonal function of human or animal, and thus, pose a potential threat to the environment and human health. The polycarbonate and epoxy resins containing BPA are commonly used to produce baby bottles, food packages, and beverage containers; thus bisphenol A may enter food and the environment. Therefore, developing a simple and highly sensitive analytical method for the determination of BPA is of great importance. Methods: In this study, an electrochemical sensor based on an adenine/carbon nanotube (Adenine/CNT) modified carbon paste electrode (CPE) was proposed for determination of BPA. Results: The obtained results demonstrate that the modified electrode used in this research had strong catalytic activity toward the oxidation of BPA. Also, applying adenine and carbon nano-tubes in carbon paste electrode resulted in reduction of the electron transfer resistance and significant increase of electron transfer rate. Discussion: According to the results, type of the employed modifier has a significant effect on sensitivity and selectivity of detection. Therefore, novel sensing materials with high stability, good catalytic activity and excellent conductivity can improve its measurement process.