Ph.D, MSc

Dr. Beena S. currently serves as Assistant Professor in the department of Chemistry, Amrita School of Arts and Sciences. She received her Ph. D. in 2011 from Cochin University of Science and Technology in the area of electrochemical sensors for the determination of metal ions.

She also worked at the Polish Academy Sciences, Poland as part of DST INDO-POLISH project. Her current research area is fabrication of electrochemical sensors for biomolecules and pharmaceuticals.



Publication Type: Journal Article

Year of Publication Title


R. Rejithamol, Dr. Beena S., A Santhy, and Asha B Nair, “Synthesis, Characterization and Photophysical Properties of Benzylidene-Fluorene Derivatives”, International Conference on Materials Processing and Characterization, vol. 5, no. 9, pp. 17694-17698, 2018.[Abstract]

A convenient and rapid method for the synthesis of benzylidene-fluorene from aromatic aldehydes and fluorene in presence of 1, 8-diazobicyclo [5,4,0] undec-7-ene (DBU) as an organic catalyst at room temperature giving good yields, short reaction time and easy isolation. Fluorene based π-conjugated organic compounds have found dominant usance that bring about them deserved entrant for utilizations in organic optoelectronic devices and chemical sensors. The report high points an approach to synthesize these materials and to study the photophysical properties

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Dr. Beena S. and Krishnapillai Girish Kumar, “PVC Membrane Sensor for Nd (III) Based on N 1 , N 2 -Bis (Salicylidine) Butane-1, 4 -Diamine”, International Journal of Advanced Research in Chemical Science (IJARCS), vol. volume 3, no. Issue 2, 2016.[Abstract]

N 1 , N2 -bis(salicylidine)butane-1,4-diamine (SAB ) based PVC membrane sensor was fabricated for Nd(III). The developed sensor showed nernstian response in the concentration range of 1.0×10-6 to 1.0×10-1 M. Nernstian slope of the proposed sensor was found to be 20.6±0.3 mV/decade in the pH range 3.0 to 7.5. The developed sensor displays a response time of <15 s. The proposed sensor can be used over a period of 7 weeks without any significant changes in its Nerstian behaviour. The sensor showed good selectivity for neodymium when compared with other metal ions such as Na+ , K+ , Mg2+, Ca2+, Pb2+, Ag+ , Pr3+ , Sm3+, La3+, and Gd3+. This electrode was used as an indicator electrode in the potentiometric titration of neodymium ions with EDTA and was also applied in the determination of neodymium in binary mixture. More »»


Dr. Beena S. and Krishnapillai Girish Kumar, “Chemically Modified Carbon Paste Sensor Based on N1, N2-bis(salicylidine)butane-1,4-diamine for Potentiometric Determination of Nd(III) (Accepted)”, Polish Journal of Environmental Studies, 2016.


Dr. Beena S. and Girish Kumar, “Electroactive Dipyremethane Cu(II) Monolayers”, Electroanalysis, pp. 2317-2323, 2009.


Dr. Beena S., Izabela Grzybowska, Czesława Orlewska, Jerzy Radecki, Wim Dehaen, Krishnapillai Girish Kumar, and Hanna Radecka, “Electroactive Dipyrromethene-Cu(II) Monolayers Deposited onto Gold Electrodes for Voltammetric Determination of Paracetamol”, Electroanalysis, vol. 20, pp. 2317–2323, 2008.[Abstract]

Dipyrromethene-Cu(II) derivatives possessing two dodecane alkyl chains have been used for the modification of gold electrodes. Electroactive host molecules have been incorporated into a lipophilic dodecanethiol SAM deposited onto gold electrodes through hydrophobic and van der Waals interactions (embedment technique). The presence of dipyrromethene-Cu(II) redox centers on the electrode surface was proved by cyclic voltammetry and Osteryoung square-wave voltammetry. The Au electrodes incorporating redox active Cu(II)-dipyrromethene SAMs were used for the direct voltammetric determination of paracetamol in human plasma. More »»


Dr. Beena S., Marta Pająk, Jerzy Radecki, Wouter Maes, Wim Dehaen, Krishnapillai Girish Kumar, and Hanna Radecka, “PVC Supported Liquid Membrane and Carbon Paste Potentiometric Sensors Incorporating a Mn(III)-Porphyrin for the Direct Determination of Undissociated Paracetamol”, Electroanalysis, vol. 20, pp. 2009–2015, 2008.[Abstract]

PVC supported liquid membrane and carbon paste potentiometric sensors incorporating an Mn(III)-porphyrin complex as a neutral host molecule were developed for the determination of paracetamol. The measurements were carried out in solution at pH 5.5. Under such conditions paracetamol exists as a neutral molecule. The mechanism of molecular recognition between the Mn(III)-porphyrin and paracetamol, leading to potentiometric signal generation, is discussed. More »»


K. Girish Kumar, Sareena John, Pearl Augustine, Remalakshmy Poduval, and Dr. Beena S., “A novel mebendazole selective membrane sensor and its application to pharmaceutical analysis”, 2007.[Abstract]

A PVC membrane sensor for the selective determination of mebendazole (MBZ) was fabricated. The sensor is based on an ion association of MBZ with silicotungstic acid (STA) as ion pair and bis(2-ethylhexyl)phthalate (BEP) as the plasticizing agent in a PVC matrix. The sensor showed a linear response for MBZ for a concentration range 1.0x10(-6)-5.0x10(-2) M with a Nernstian slope of 55.8 mV/decade (limit of detection 6.3x10(-7) M) in the pH range 4-7. It has a fast response time of <30 s. The sensor showed a very good selectivity for MBZ with respect to a large number of ions. The direct determination of MBZ in pharmaceutical formulations gave results that compare well with the data obtained from the standard method. More »»

Publication Type: Conference Paper

Year of Publication Title


Dr. Beena S., A Santhy, R Vidya, P Uma Sankar, and Rejithamol, R., “Clopidogrel-tetralodo mercurate ion association immobilized PVC membrane sensor for the determination of clopidogrel in pharmaceutical formulations”, in 2017 International Conference on Technological Advancements in Power and Energy (TAP Energy), Kollam, India, 2017.[Abstract]

Fabrication of the PVC membrane sensor incorporating clopidogrel-tetraido mercurate as an electro active material for the determination of clopidogrel bisulphate is demonstrated. Sensor matrix having a composition of PVC 32%, ion association 2.5% and Di-n-butyl phthalate 56.5 % showed best nernstian behavior in the concentration range 1×10 -2 -1×10 -7 M with a lower detection limit of 2.9 × 10 -8 M. Working pH range and response time was found to be 1.8-4.0 and 5s respectively. The sensor was fruitfully utilized for the quantification of clopidogrel from Clopilet tablets. Comparative studies on the various parameters that depend on the performance characteristics of the present sensor with that of the literature reports were also included.

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