Chemiluminescent flow method for determination of formaldehyde

Slawinska, Danuta; Sławiński, Janusz

doi:10.1021/ac60363a040

Cited by 114 publications

(51 citation statements)

References 33 publications

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“…Not surprisingly, the organic species most frequently produced (Table 4) by the decomposition of the parent ions were found to be formate, acetate, and oxalate, all of which are stable in caustic solutions at elevated temperatures (Table 2) and are well-known constituents of plant Bayer liquors. (Tulyathan, 1989;Slawinska and Slawinski, 1975) and which decomposes almost instantly when dissolved in caustic solution even at room temperature.…”

Section: Degradation Productsmentioning

confidence: 99%

Decomposition of Bayer process organics: Low-molecular-weight carboxylates

et al. 2009

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The degradation of twenty-one low-molecular-weight organic carboxylates has been studied at 90 and 180 °C in a synthetic Bayer liquor consisting of 6 mol kg -1 aqueous NaOH solution for periods of up to 36 days. The reactions were monitored and the major degradation products identified by HPLC and NMR spectroscopy. The carboxylates chosen for study either could be intermediates, or occur as a result of decomposition of organic matter in the Bayer process. Aliphatic carboxylates without hydroxyl substituents were stable at 90 °C but decomposed at 180 °C, except for formate, acetate, oxalate and succinate. The corresponding aromatic carboxylates were stable even at 180 °C. Both aliphatic and aromatic carboxylates with hydroxyl substituents were unstable at 90 °C, except for lactate and 4-hydroxybenzoate. The most frequently detected decomposition products for both aliphatic and aromatic carboxylates were formate, acetate, oxalate, succinate and lactate. Phenolate was also observed for some aromatic carboxylates. These products are briefly discussed with reference to possible mechanisms for the degradation reactions.

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Section: Degradation Productsmentioning

confidence: 99%

Decomposition of Bayer process organics: Low-molecular-weight carboxylates

et al. 2009

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“…22,26,27 The oxidation of some fluorescent compounds was accompanied by light emission, the CL is due to intermolecular energy transfer. 22,28,29 Thus, in this system, the enhancement is due to energy transfer from the excited states of nitrogen to the emitting species produced by the reaction of fluorescein sodium with NBS and fluorescein sodium itself, which caused an increase in the CL efficiency. The CL spectrum of this reaction sensitized by fluorescein sodium showed that the maximum wavelength of CL spectrum is 535 nm (Fig.…”

Section: Characteristics Of Chemiluminescencementioning

confidence: 96%

Flow Injection Chemiluminescence Determination of Amino Acids by Oxidation with N-Bromosuccinimide

Guang-hong

Chen

2002

ANAL. SCI.

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“…This indicated the production of 3-hydroxycyclohexa-3,5-diene-1,2-dione which might be a product of the first stage of the polyphenol CL reaction; also the singlet oxygen of the product is the CL species. 2 EDC reacts with one of the hydroxyl groups of the polyphenols and accelerates the production of 3-hydroxycyclohexa-3,5-diene-1,2-diones, compounds produced during the initial step of the polyphenol CL in the presence of alkali and hydrogen peroxide. 2 Such an enhancement effect of EDC in polyphenol CL has not yet been reported.…”

Section: For Confirmation Of the Structure Of The Edc Adduct With Pyrmentioning

confidence: 99%

“…2 EDC reacts with one of the hydroxyl groups of the polyphenols and accelerates the production of 3-hydroxycyclohexa-3,5-diene-1,2-diones, compounds produced during the initial step of the polyphenol CL in the presence of alkali and hydrogen peroxide. 2 Such an enhancement effect of EDC in polyphenol CL has not yet been reported. EDC should be useful for a highly sensitive assay of bioactive compounds using polyphenol CL.…”

Section: For Confirmation Of the Structure Of The Edc Adduct With Pyrmentioning

confidence: 99%

Chemiluminescence Enhancer of Polyphenols, l-Ethyl-3-(3-dimethylaminopropyl)carbodiimide

et al. 1998

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Polyphenols emit light in the presence of hydrogen peroxide in an alkaline medium, and are utilized in detecting cobalt and formaldehyde using flow injection.1,2 However, polyphenol chemiluminescence (CL) is very weak compared to representative CL compounds, such as luminol and the acridium ester; therefore, their application for the assay of bioactive compounds was not reported.Recently, new enhancers, trans-4-(3-propionic acid)phenylboronic acid and 4-biphenylboronic acid, have been developed for the horseradish peroxidase (HRP) catalyzed CL of pyrogallol and purpurogallin. Especially, 4-biphenylboronic acid enhanced the peak light emission 314-fold during CL of the HRP-purpurogallin reaction. We found a strong enhancement effect during polyphenol CL development with the addition of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC). To evaluate the enhancement effect of EDC during polyphenol CL development, gallic acid (GA), gallic acid methyl ester (GM) and pyrogallol were used as models for the polyphenols. ExperimentalApparatus CL reactions were carried out in a 75´12 mm roundbottom glass tube. CL measurements were performed using a photon-counting luminometer, Lumat LB 9501 (Berthold, Wildbad, Germany); its operation and data processing were performed using a personal computer (PC 9801 ES2, NEC Corp., Tokyo, Japan) with a luminometer program, LB 9501/9801 Ver.1.41 (Japan Berthold, Tokyo, Japan). The proton nuclear magnetic resonance ( 1 H-NMR) spectrum was taken in methanold 4 (CD 3 OD) with a Varian UNITY plus (USA) spectrometer at 500 MHz. Reagents and solutionsDeionized and distilled water purified by a Mili-Q II (Japan Milipore, Tokyo, Japan) was used. GA was purchased from Aldrich (Milwaukee, WI, USA). GM was purchased from Tokyo Kasei Organic Chemicals (Tokyo, Japan). Pyrogallol and EDC were purchased from Nacalai Tesque (Kyoto, Japan). GA, GM, pyrogallol and EDC were dissolved in water just before use. Hydrogen peroxide (31%, v/v) was purchased from Mitsubishi Gas Kagaku (Tokyo, Japan). All other chemicals and solvents were of reagent grade. Procedure for the estimation of enhancement effect of EDCTo 200 ml of 10 mM polyphenols (GA, GM or pyrogallol) was added 100 ml of 0 -1.0 M EDC. To the mixture was added 100 ml of 100 mM sodium hydroxide for GA and GM, or 10 mM for pyrogallol or water. After standing for 25 s, the CL reaction was initiated by the addition of 100 ml of 1.0 M hydrogen peroxide using an automatic injection system in the luminometer. The CL emission was measured for 2 min and the integral photon counts were used. For confirmation of the structure of the EDC adduct with pyrogallolTo a stirred aqueous pyrogallol (0.63 g in 10 ml water, 5 mmol) solution was added EDC (0.19 g, 1 mmol) at room temperature, and the mixture was stirred for 2 h. The mixture was poured into 20 ml of water and the pyrogallol extracted with diethylether. The aqueous layer containing Ia (Fig. 2) was treated with active charcoal. The filtrate was lyophilized and 0.12 g of compound Ia was obtained as a brown so...

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Chemiluminescent flow method for determination of formaldehyde

Abstract: Formaldehyde and gallic acid oxidized with aqueous alkaline hydrogen peroxide produce relatively strong chemiluminescence

Cited by 114 publications

References 33 publications

Decomposition of Bayer process organics: Low-molecular-weight carboxylates

Decomposition of Bayer process organics: Low-molecular-weight carboxylates

Flow Injection Chemiluminescence Determination of Amino Acids by Oxidation with N-Bromosuccinimide

Chemiluminescence Enhancer of Polyphenols, l-Ethyl-3-(3-dimethylaminopropyl)carbodiimide

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