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Dedkova, V. P.; Швоева, О. П.; Саввин, С. Б.

doi:10.1023/a:1014990028794

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…Herein, we report the sensitive optical detection of cyanide with immobilized corrinoids. We have successfully applied colorimetric solid phase − with spatially separated extraction and detection zones for the optical detection of cyanide and hydrogen cyanide in complex, colored samples without time-consuming sample preparation. Simultaneous optical detection of cyanide and thiocyanate is also possible following this approach.…”

Section: Introductionmentioning

confidence: 99%

Complex Samples Cyanide Detection with Immobilized Corrinoids

Männel-Croisé

Zelder

2012

ACS Appl. Mater. Interfaces

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Colorimetric solid phase with spatially separated extraction and detection zones as a rapid, effective and economic method for the optical detection of cyanide in complex samples is described. The system is seven times more sensitive for the optical detection of cyanide than the same class of chemical sensors used under homogeneous conditions. The application of the method in the detection of (i) endogenous cyanide in colored plant samples and of (ii) hydrogen cyanide in tobacco smoke is shown. The optical detection of multiple anions within a single sample has been demonstrated in principle for the detection of both CN(-) and SCN(-). Immobilized aquacyano-corrinoids and immobilized vitamin B12 are applied as chemical sensors, and cyanide is qualitatively identified by the violet color (λ(max) = 583 nm) of the corresponding dicyano-complex. Quantitative determinations with diffuse reflectance spectroscopy (DRUV-vis) are possible in the linear range up to 0.2 mg/L with a LOD of 1 μg/L. Alkyl-modified silica particles are employed for immobilization of the indicator on the surface of the solid phase (detection zone), and for removal of colored hydrophobic interferents (extraction zone).

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Section: Introductionmentioning

confidence: 99%

Complex Samples Cyanide Detection with Immobilized Corrinoids

Männel-Croisé

Zelder

2012

ACS Appl. Mater. Interfaces

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“…This reaction gave rise to classical gravimetric or colorimetric methods and has long been used in a variety of analytical procedures for arsenic determination where derivatization step is required. [24,25] It has to be noted, that such reaction is applicable only for arsenic in oxidation state + 5 extraction, which allows using it for As(V) speciation. [3]…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Under these conditions molybdoarsenic heteropolyacid is formed. Due to its hydrophobicity, this compound is known as a classical reagent that has long been utilized for liquid-liquid extraction and further arsenic determi- Oxidizing agent and conditions Apparent conversion rate, % Chloramine T, HCl 0.12 mol L À 1 , stoichiometric, 1 hour, heating 28.0 Chloramine T, HCl 0.12 mol L À 1 , 5-fold excess, 1 hour, heating 75.5 Chloramine T, HCl 0.12 mol L À 1 , 20-fold excess, 1 hour, heating 71.2 Chloramine T, HCl 0.12 mol L À 1 , 100-fold excess, 1 hour, heating 56.7 Chloramine T, HCl 0.12 mol L À 1 , 5-fold excess, 1 hour, room temperature 75.7 Chloramine T, HCl 0.12 mol L À 1 , 5-fold excess, 24 ChemistrySelect nation in various objects. [21] This reagent has been successfully employed for arsenic (V) determination after cloud point extraction and preconcentration in water using electrothermal atomic absorption spectrometry (ETAAS), [12] in biological samples using electrothermal atomic absorption spectrometry, [13] and in water using hydride generation atomic fluorescence spectrometry.…”

Section: Theorymentioning

confidence: 99%

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Determination of Arsenic by ICP‐OES after Cloud Point Extraction with Salt Induced Phase Separation: Application to Gadolinium Based MRI Contrast Agent**

et al. 2022

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A new separation and preconcentration procedure based on cloud point extraction was developed for arsenic trace analysis using inductively coupled plasma optical emission spectrometry. Arsenic in + 5 oxidation state was complexed with ammonium molybdate, Triton X-100 was used as a surfactant. Optimal parameters such as pH value and Triton X-100 concentration were determined. Phase separation was induced by adding a salting-out agent to avoid an analyte loss because of temperature changes. The combination of Triton X-100 with ammonium sulphate as a salting-out agent was firstly sug-gested as an extraction system for arsenic quantification. Conditions for arsenic (III) into arsenic (V) oxidation were established. The proposed procedure was successfully applied for arsenic quantification in a gadolinium based magnetic resonance imaging (MRI) contrast agent gadobutrol at the level indicated in the guideline for elemental impurities approved by International council for harmonisation of technical requirements for pharmaceuticals for human use (ICH Q3D) as a limit concentration.

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“…16 This property was also used for its preconcentration on a anionic exchanger. 17 We preferred the former technique to develop simple on-site analysis by the measurement of reflection absorbance. As typical cationic and anionic surfactants, Zeph and sodium dodecylbenzenesulfonate (SDB) were tested for the collection of MB on a membrane filter.…”

Section: Collection Of Molybdenum Blue On Membrane Filtermentioning

confidence: 99%

On-site Determination of Trace Arsenic by Reflection-Absorption Colorimetry of Molybdenum Blue Collected on a Membrane Filter

Hasegawa¹,

Suzuki

Kawakubo

2017

ANAL. SCI.

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An on-site determination method for trace arsenic has been developed by collecting it as molybdenum blue (MB) in the presence of tetradecyldimethylbenzylammonium chloride on a mixed cellulose ester membrane filter and by measuring reflection absorbance (RA) of MB on the filter using a laboratory-made palm-top size reflection-absorbance colorimeter with a red light-emitting diode. The value of RA was proportional to the amount of arsenic up to 0.5 μg with a detection limit of 0.01 μg. The proposed method was successfully applied to soil extract and hot-spring water samples.

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Untitled

Cited by 8 publications

References 4 publications

Complex Samples Cyanide Detection with Immobilized Corrinoids

Complex Samples Cyanide Detection with Immobilized Corrinoids

Determination of Arsenic by ICP‐OES after Cloud Point Extraction with Salt Induced Phase Separation: Application to Gadolinium Based MRI Contrast Agent**

On-site Determination of Trace Arsenic by Reflection-Absorption Colorimetry of Molybdenum Blue Collected on a Membrane Filter

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