Determination of cyanide by conversion to ammonia and ultraviolet absorption spectrometry in the gas phase

Grieve, Steven.; Syty, Augusta

doi:10.1021/ac00234a039

Cited by 16 publications

(4 citation statements)

References 10 publications

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“…Chromatography was carried out with a Shimadzu LC-3A liquid chromatograph (Kyoto, Japan) with a 250 mm X 4 mm i.d. stainless steel column prepacked with LiChrosorb RP-18 (5 Mm, E. Merck, Darmstadt, Germany). A 50 mm X 4 mm i.d.…”

Section: Methodsmentioning

confidence: 99%

Liquid chromatographic determination of ammonium in water

Mizobuchi¹,

Tamase²,

Kitada³

et al. 1984

Anal. Chem.

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Section: Methodsmentioning

confidence: 99%

Liquid chromatographic determination of ammonium in water

Mizobuchi¹,

Tamase²,

Kitada³

et al. 1984

Anal. Chem.

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“…1 A direct and sensitive method for the determination of cyanide is reported based on the conversion to ammonia, followed by UV absorption spectrometry. 12 Another spectrophotometric method is based on the conversion of cyanide to cyanate using sodium hypochlorite, followed by acid hydrolysis to form ammonium sulfate. The formed ammonium sulfate is determined based on the Berthelot reaction using salicylic acid, sodium hypochlorite, and sodium nitroprusside to form indophenol.…”

Section: Introductionmentioning

confidence: 99%

Cyanide Reaction with Ninhydrin: Elucidation of Reaction and Interference Mechanisms

Drochioiu

Mangalagiu

Avram³

et al. 2004

ANAL. SCI.

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A new sensitive spectrophotometric method has recently been developed for the trace determination of cyanide with ninhydrin. Cyanide ion was supposed to act as a specific base catalyst. Nevertheless, this paper demonstrates that the reported assay is based on a novel reaction of cyanide with 2,2-dihydroxy-1,3-indanedione, which affords purple or blue colored salts of 2-cyano-1,2,3-trihydroxy-2H indene. Hydrindantin is merely an intermediary of the reaction. The formation of a stable and isolable ninhydrin-cyanide compound has been confirmed by its preparation in crystalline form. Also, it is thoroughly characterized by elemental as well as MS, IR, UV/VIS and 1 H NMR analyses. The Ruhemann's sequence of reactions of cyanide with ninhydrin has been reconsidered and an adequate mechanism of the reaction is proposed. As a consequence, the interference of oxidizers as well as copper, silver and mercury ions with the cyanide determination has been elucidated.

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“…In the past, little analytical use has been made of ultraviolet and vacuum ultraviolet molecular absorption spectroscopy. Syty, et al detected sulphite, sulphide, ammonium ion, iodide, and bromide in liquid samples by converting these ions to the gaseous species so 2 , H 2 s, NH 3 , r 2 and Br 2 and measuring the ultraviolet or visible molecular absorption [11][12][13][14][15][16][17][18]. Fuwa and Vallee detected so 2 using flame absorption at 207 nm [19].…”

Section: Introductionmentioning

confidence: 99%

Atomic line molecular analysis for multicomponent determinations in the gas phase

Koga¹,

Hadeishi²,

McLaughlin³

1985

Anal. Chem.

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A method to continuously monitor several molecules in the gas phase by measuring absorption in the ultraviolet and vacuum ultraviolet spectral regions is described. This approach is capable of almost simultanous monitoring even when the spectra overlap. Molecules characterized by highly structured absorption spectra, diffuse absorption spectra, or mixtures of both can be determined. Good agreement between experimental measurements and samples of known concentration was obtained. Special light sources that emit strong atomic and ionic lines in this wavelength region were constructed and are important in achieving the high sensitivities that were observed. A method of checking for the presence of interferents and improving specificity by using measurements at several wavelengths for one molecule is described. This technique can easily be applied to on-line process control and provides almost real time analysis.

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Determination of cyanide by conversion to ammonia and ultraviolet absorption spectrometry in the gas phase

Cited by 16 publications

References 10 publications

Liquid chromatographic determination of ammonium in water

Liquid chromatographic determination of ammonium in water

Cyanide Reaction with Ninhydrin: Elucidation of Reaction and Interference Mechanisms

Atomic line molecular analysis for multicomponent determinations in the gas phase

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