Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-01-01

Journal: RSC ADVANCES

Included Journals: Scopus、EI、SCIE

Volume: 4

Issue: 32

Page Number: 16893-16898

ISSN: 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.