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Indexed by:期刊论文

Date of Publication:2014-01-01

Journal:RSC ADVANCES

Included Journals:SCIE、EI、Scopus

Volume:4

Issue:32

Page Number:16893-16898

ISSN No.:2046-2069

Abstract:Electrochemiluminescence (ECL) of rhodamine B (RhB) at a single-wall carbon nanotube (SWNT) modified glassy carbon (GC) electrode has been employed for the determination of sodium sulfide. A linear response (R=0.99) over a sodium sulfide concentration range of 1.0 x 10(-14) to 1.0 x 10(-10) mol L-1 and a detection limit of 1.0 x 10(-14) mol L-1 can be reached. Furthermore, RhB was covalently linked with SWNT and then modified onto a GC electrode surface to detect sodium sulfide. It was found that the detection limit can be further reduced to 1.0 x 10(-16) mol L-1 in the case of a RhB-hexamethylenediamine-SWNT modified GC electrode. This is much lower than other detection methods. The proposed method was applied to the determination of sodium sulfide added into deionized water; the recovery was quite satisfactory with good reproducibility and stability. All these results provide the possibility of developing a novel ECL detection method for sodium sulfide.