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Ruthenium(III) Schiff's Base Complex as Novel Chloride Selective Membrane Sensor
Author(s) -
Ganjali Mohammad Reza,
Pourjavid Mohammad Reza,
Rezapour Morteza,
Poursaberi Tahereh,
Daftari Azadeh,
SalavatiNiasari Masoud
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302833
Subject(s) - potentiometric titration , ruthenium , chemistry , inorganic chemistry , schiff base , ammonium bromide , detection limit , chloride , selectivity , plasticizer , cationic polymerization , membrane , bromide , vinyl chloride , titration , electrode , polymer chemistry , catalysis , chromatography , organic chemistry , polymer , pulmonary surfactant , biochemistry , copolymer
A novel chloride PVC‐based membrane sensor based on a ruthenium(III) Schiff's base complex, as an excellent neutral carrier, has been developed. The ruthenium complex, in combination with a ketonic plasticizer and a cationic additive led to ISEs with fundamental characteristics, such as slope sensitivity, short response times and selectivity coefficients, which were sufficient for practical applications. The sensor with composition of 30% PVC, 62% benzyl acetate, 5% ruthenium(III) Schiff's base complex and 3% hexadecyltrimethyl ammonium bromide displays near‐Nernstian behavior in a wide concentration range (1.0×10 −1 –3.0×10 −6 M with slope of −54.5±0.5) with a detection limit of 2.0×10 −6 M (71.0 ng per mL). The response of the electrode is independent on pH in the range of 4.0–10.0 and can it be used for at least ten weeks. The proposed electrode shows a very short response time (<20 s) in whole concentration range. The sensor displays high selectivity toward chloride ions over several organic and inorganic anions. It was successfully applied for the determination of chloride in serum samples. It was also used as an indicator electrode in the potentiometric titration of chloride ions with silver nitrate solution.