Flow-injection analysis with chemiluminescent detection of sulphite using Na2CO3NaHCO3-Cu2+ system

Lin, Jin; Hobo, Toshiyuki

doi:10.1016/0003-2670(95)00611-7

Cited by 80 publications

(64 citation statements)

References 18 publications

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“…Therefore, the effect of carbonate on the CL signal was obvious. It was well known that a number of CL analyses were carried out in the presence of carbonate solution [17,18], not only based on its buffer function but also its CL enhancement effect. To clarify the CL mechanism of the present system, the following experiments were carried out.…”

Section: A Batch Methodsmentioning

confidence: 99%

“…The results showed that DABCO and NaN 3 did not quench the CL intensity, which provided strong evidence that 1 O 2 did not contribute to the observed CL. A number of investigations [17,18] have demonstrated that carbonate was a luminous species when present with a strong oxidant in basic solution. In our previous work [23], the CL emission band at 436-446 nm was also recorded (as shown in Fig.…”

Section: And Fluorescent Spectramentioning

confidence: 99%

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Carbonate-catalyzed chemiluminescence decomposition of peroxynitrite via (CO2)2∗ intermediate

Lin

2004

Catalysis Today

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Peroxynitrous acid (ONOOH) was formed by the on-line rapid reaction of acidified hydrogen peroxide with nitrite in a simple flow system. A weak chemiluminescent (CL) signal was observed due to the production of singlet oxygen ( 1 O 2 ) when ONOOH reacted with NaOH, whereas the replacement of NaOH by Na 2 CO 3 markedly enhanced the CL intensity. The predominant CL-enhanced pathway was achieved by the carbonate-catalyzed decomposition of peroxynitrite (ONOO − ). Carbonate species was regenerated in the process, that is, carbonate acts as a catalyst. Based on the studies of CL and fluorescence spectra, a possible CL mechanism from the reaction of carbonate with ONOOH was proposed. In brief, ONOOH was an unstable compound in acidic solution and could be quenched into ONOO − in basic media. It was suggested that ONOO − reaction with excess HCO 3 − proceeded via one-electron transfer to yield bicarbonate ion radicals (HCO 3 • ). The recombination of HCO 3 • may directly generate excited triplet dimers of two CO 2 molecules [(CO 2 ) * 2 ]. With the decomposition of this unstable intermediate to CO 2 , the energy was released by CL emission. The addition of uranine into carbonate solution caused enhancement of the CL signal, which was due to a part of excited triplet dimers of two CO 2 molecules energy to transfer to uranine, resulting in two CL peaks.

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Section: A Batch Methodsmentioning

confidence: 99%

Section: And Fluorescent Spectramentioning

confidence: 99%

Carbonate-catalyzed chemiluminescence decomposition of peroxynitrite via (CO2)2∗ intermediate

Lin

2004

Catalysis Today

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“…While, the oxidation of -SO 3 2− in acid solutions was a well known CL reaction and the analytical properties of the reaction have been thoroughly studied with MnO 4 − [26][27][28], Ce(IV) [29,30], Ag(II) [31] and Mn(III) [32]. According to the different authors, the radical mechanism has been proposed for the CL oxidation of sulfite [26][27][28][29][30][31][32][33], which attributes the weak CL emitted by the reaction between sulfite and oxidant to the formation of the excited sulfur dioxide (SO 2 * ). Moreover, some fluorescent compounds could sensitize the CL intensity because the energy of the SO 2 * can easily be transferred to a fluorophore intentionally added to the system [27,31,33].…”

Section: Mechanism Of the Mno 2 Chemiluminescence Systemmentioning

confidence: 99%

Chemiluminescent flow-through sensor for automated dissolution testing of analgin tablets using manganese dioxide as oxidate

Zhao

Zhang

et al. 2004

Sensors and Actuators B: Chemical

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“…The CL was produced by sulfite as follows: sulfite could be oxidized by copper(II) 6 in an alkaline solution, and reacted with the chemiluminescent reagent luminol. 7 In an acidic solution it could be oxidized by potassium permanganate, 8 cerium(IV) 9 or potassium bromide.…”

Section: Introductionmentioning

confidence: 99%

Chemiluminescence of ClO₃⁻‐SO₃²⁻‐Rh6G‐SDBS System and Its Application to the Determination of Sulfite

2006

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Based on the micelle synergism mechanism, a chemiluminescence (CL) flow system for the determination of sulfite was described. The CL signal generated from the reaction of chlorate with sulfite in acidic solution was very weak, while the interfusion of sodium dodecylbenzenesulfonate (SDBS) resulted in a highly chemiluminescent intensity. The major goal of this work was to investigate and develop the SDBS micelle synergetic CL system. The mechanism was proposed and proved by spectrometry. The results indicated that the unique structure of SDBS micelles promoted the aggregation of rhodamine 6G (Rh6G) and a much easier energy transfer, leading to a marked shift to red in the CL emission. This CL system was developed for the determination of sulfite and the concentration of sulfite was proportional to the CL intensity in the range of 5.0×10 -8 -1.0×10 -5 mol/L with the detection limit of 1.7×10 -8 mol/L (S/N＝3). The relative standard deviation was 3.3% for 1.0×10 -6 mol/L sulfite solution with eleven repeated measurements. This method was successfully applied to the determination of sulfite in powder sugar.

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Flow-injection analysis with chemiluminescent detection of sulphite using Na2CO3NaHCO3-Cu2+ system

Cited by 80 publications

References 18 publications

Carbonate-catalyzed chemiluminescence decomposition of peroxynitrite via (CO2)2∗ intermediate

Carbonate-catalyzed chemiluminescence decomposition of peroxynitrite via (CO2)2∗ intermediate

Chemiluminescent flow-through sensor for automated dissolution testing of analgin tablets using manganese dioxide as oxidate

Chemiluminescence of ClO₃⁻‐SO₃²⁻‐Rh6G‐SDBS System and Its Application to the Determination of Sulfite

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Flow-injection analysis with chemiluminescent detection of sulphite using Na2CO3NaHCO3-Cu2+ system

Cited by 80 publications

References 18 publications

Carbonate-catalyzed chemiluminescence decomposition of peroxynitrite via (CO2)2∗ intermediate

Carbonate-catalyzed chemiluminescence decomposition of peroxynitrite via (CO2)2∗ intermediate

Chemiluminescent flow-through sensor for automated dissolution testing of analgin tablets using manganese dioxide as oxidate

Chemiluminescence of ClO3−‐SO32−‐Rh6G‐SDBS System and Its Application to the Determination of Sulfite

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Chemiluminescence of ClO₃⁻‐SO₃²⁻‐Rh6G‐SDBS System and Its Application to the Determination of Sulfite