Chemical Speciation Measurements of Silver Ions in Alkaline Carbonate Electrolytes Using Differential Pulse Stripping Voltammetry on Glassy Carbon Compared With Ion Selective Electrode Measurements
2013 (English)In: International Journal of Electrochemical Science, ISSN 1452-3981, Vol. 8, no 3, 3851-3865 p.Article in journal (Refereed) Published
Given the increasing incorporation of silver nanoparticles as an antibacterial additive in washing machines and textiles, sensitive methods for accurate determination of Ag+ ions in laundry relevant electrolytes (alkaline carbonate) are required. The most widely reported method, the silver ion selective electrode (ISE), lacked sensitivity and accuracy and was affected by the concentration of Na2CO3 in solution. Differential pulse stripping voltammetry (DPSV) on glassy carbon electrodes (GCE) was therefore investigated as an alternative technique. Surface preparation of the GCE surface was essential and a suitable procedure was developed. A linear response was observed from 0 to 180 mg L-1 with a lower detection limit of 500 ng L-1 (5 nM). DPSV was shown to be significantly more sensitive and accurate in determining the Ag+ activity than the silver ISE technique, particularly below 200 nM.
Place, publisher, year, edition, pages
2013. Vol. 8, no 3, 3851-3865 p.
Silver ion, alkaline electrolytes, laundry solutions, differential pulse stripping voltammetry, ion selective electrode
Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-121482ISI: 000316566700063ScopusID: 2-s2.0-84875063343OAI: oai:DiVA.org:kth-121482DiVA: diva2:619889
QC 201305072013-05-072013-04-292013-05-07Bibliographically approved