Qualification: 
Ph.D, MSc
Email: 
beenas@am.amrita.edu

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.

 

Publications

Publication Type: Journal Article

Year of Publication Publication Type Title

2016

Journal Article

Dr. Beena S. and Kumar, K. Girish, “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.

2016

Journal Article

Dr. Beena S. and Kumar, K. Girish, “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 »»

2009

Journal Article

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

2008

Journal Article

Dr. Beena S., Pająk, M., Radecki, J., Maes, W., Dehaen, W., Kumar, K. Girish, and Radecka, H., “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 »»

2008

Journal Article

Dr. Beena S., Grzybowska, I., Orlewska, C., Radecki, J., Dehaen, W., Kumar, K. Girish, and Radecka, H., “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 »»

2007

Journal Article

G. K. Kumar, John, S., Augustine, P., Poduval, R., 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 »»

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AMRITA
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