Sensors 2008, 8(8), 4995-5004; doi:10.3390/s8084995
Article

Free Base Porphyrins as Ionophores for Heavy Metal Sensors

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Received: 25 July 2008; in revised form: 13 August 2008 / Accepted: 21 August 2008 / Published: 25 August 2008
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Two functionalized porphyrins: 5,10,15,20-tetrakis(3,4-dimethoxyphenyl) porphyrin (A) and 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (B) obtained and characterized by us were used as ionophores (I) for preparing PVC-based membrane sensors selective to Ag+, Pb2+ and Cu2+. The membranes were prepared using three different plasticizers: (bis(2-ethylhexyl)sebacate (DOS), dioctylphtalate (DOP), o-nitrophenyl octyl ether (NPOE) and potassium tetrakis(4-chlorophenyl)borate (KTClPB) as additive. The functional parameters (linear concentration range, slope and selectivity) of the sensors with membrane composition: (I:PVC:KTClPB:Plasticizer) in different ratios were investigated. The best results were obtained for the membranes in the ratio I:PVC:KTClPB:Plasticizer 10:165:5:330. The influence of pH on the sensors response was studied. The sensors were used for a period of four months and their utility has been tested on synthetic and real samples.
Keywords: Porphyrins; ionophores; sensors; heavy metals; PVC-matrix.
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MDPI and ACS Style

Vlascici, D.; Fagadar-Cosma, E.; Pica, E.M.; Cosma, V.; Bizerea, O.; Mihailescu, G.; Olenic, L. Free Base Porphyrins as Ionophores for Heavy Metal Sensors. Sensors 2008, 8, 4995-5004.

AMA Style

Vlascici D, Fagadar-Cosma E, Pica EM, Cosma V, Bizerea O, Mihailescu G, Olenic L. Free Base Porphyrins as Ionophores for Heavy Metal Sensors. Sensors. 2008; 8(8):4995-5004.

Chicago/Turabian Style

Vlascici, Dana; Fagadar-Cosma, Eugenia; Pica, Elena M.; Cosma, Viorica; Bizerea, Otilia; Mihailescu, Gheorghe; Olenic, Liliana. 2008. "Free Base Porphyrins as Ionophores for Heavy Metal Sensors." Sensors 8, no. 8: 4995-5004.

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