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Tubular Detector of Silver Solid Amalgam for Electrochemical Measurements in Flow Systems
Author(s) -
Yosypchuk Oksana,
Barek Jiri,
Yosypchuk Bogdan
Publication year - 2012
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.201200443
Subject(s) - amalgam (chemistry) , aqueous solution , chemistry , electrochemistry , detection limit , nitrophenol , nuclear chemistry , detector , analytical chemistry (journal) , inorganic chemistry , electrode , chromatography , organic chemistry , catalysis , electrical engineering , engineering
This paper presents the application of the tubular detector based on silver solid amalgam (TD‐AgSA) for electrochemical determinations of reducible inorganic (Cd 2+ , Zn 2+ ) and organic (4‐nitrophenol) compounds under flow injection analysis conditions. The newly developed TD‐AgSA is simple, robust and inexpensive. The limits of detections of Zn 2+ , Cd 2+ and 4‐nitrophenol are 1.4×10 −6 , 7.0×10 −7 , and 5.0×10 −7 mol dm −3 , respectively (i.e. 0.09, 0.08 and 0.07 ppm). The obtained results proved the long‐term stability of the detector ( RSD of the determination of Zn 2+ , Cd 2+ , and 4‐nitrophenol were 0.8, 0.9 and 0.8 % ( n =10; c Zn =7.7×10 −5 mol dm −3 , c Cd =4.5×10 −5 mol dm −3 and c 4‐NPh =3.6×10 −5 mol dm −3 ), respectively and its applicability for cathodic measurements in aqueous solutions at potentials up to −2 V.