2002
DOI: 10.1016/s0003-2670(02)00515-9
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Methylene blue potentiometric sensor for selective determination of sulfide ions

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Cited by 56 publications
(17 citation statements)
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“…For a real sample study, four different brands of cigarette were selected. As can be seen in Table 1 and Figure 4B, all real samples show good recovery and the results are consistent with those measured by Caros reaction [17,18] Interestingly, the sulfide amount from two different nicotine amount cigarettes show quite different sulfide results. More sulfide was detected in the brand with high nicotine content.…”
Section: Analytical Characterization Of the Cinder/nitcspesupporting
confidence: 84%
“…For a real sample study, four different brands of cigarette were selected. As can be seen in Table 1 and Figure 4B, all real samples show good recovery and the results are consistent with those measured by Caros reaction [17,18] Interestingly, the sulfide amount from two different nicotine amount cigarettes show quite different sulfide results. More sulfide was detected in the brand with high nicotine content.…”
Section: Analytical Characterization Of the Cinder/nitcspesupporting
confidence: 84%
“…After reaction with sulfide, methylene blue can be detected at nanomolar levels by high performance liquid chromatography or gas chromatography [14,15]. A methylene blue potentiometric sensor for selective determination of sulfide ion concentration with a detection limit of 200 g L −1 has also been developed [16]. Fluorometric protocols have been investigated by exploiting the affinity of sulfide for coordinated mercuric species [9,17,18].…”
Section: Introductionmentioning
confidence: 99%
“…Este sensor potenciométrico é baseado em uma membrana sólida de Ag 2 S que é utilizada extensamente para a determinação de íons sulfeto. 7 Os potenciais do eletrodo são inicialmente verificados por uma solução de dicromato de potássio 1 g L -1 com potencial definido em pH 7,00 a 25 °C.…”
Section: Parte Experimentalunclassified
“…A solução de TAA consiste de um tampão que mantém o pH da solução em um nível alcalino com alta força iônica e a presença do ácido ascórbico retarda a oxidação do íon sulfeto em solução. 7,12 O nível alcalino com alta força iônica favorece o deslocamento do equilíbrio no sentido de formação do sulfeto. Baseado no estudo de constantes de equilíbrio de ionização pode-se dizer que a concentração do íon S 2-em solução pode ser ajustada regulando-se a concentração do íon H + .…”
Section: Parte Experimentalunclassified
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