Spectrophotometric determination of hydrogen cyanide in air using phloroglucinol

Amlathe, Sulbha; Gupta, V. K.

doi:10.1007/bf00324019

Cited by 8 publications

(10 citation statements)

References 11 publications

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“…The absorbance was measured 15 min after the beginning of the reaction. The method using phloroglucinol [9] was used for comparison.…”

Section: Discussionmentioning

confidence: 99%

“…The sensitivity of the method is greater than that of methods based on the use of picric acid (molar absorptivity 1.42×10 3 L mol -1 cm -1 [1]), pyridine and phloroglucinol (molar absorptivity 9×10 3 L mol -1 cm -1 [9]), bis(bathophenanthroline)dicyano iron (II) complex (molar absorptivities 1.5×10 3 L mol -1 cm -1 by procedure A, 3.7×10 3 L mol -1 cm -1 by procedure B, and 1.8×10 4 L mol -1 cm -1 by procedure C [11]) and is comparable with that of an enzymatic assay (detection limits 4.9 nmol L -1 and 0.2 µg mL -1 [14]) or of fluorimetric reaction of cyanide with 2,3-naphthalenedialdehyde and taurine (which detects as little as 10 pmol cyanide in a 0.5-mL sample [12,13]), and the procedure is simpler. The reaction of cyanide with 2,2-dihydroxy-1,3-indanedione is as simple and rapid as the reaction of alkaline solutions with phenolphthalein.…”

Section: Advantages Of the Methodsmentioning

confidence: 97%

“…It was subsequently [2] modified by adding resorcinol. Hydrocyanic acid in air is also frequently determined spectrophotometrically by use of the König reaction [3,4,5,6,7,8,9]. Unfortunately, many of these methods make use of carcinogenic compounds and the procedures are relatively sophisticated, because of the number of steps and the requirement for many reagents.…”

Section: Introductionmentioning

confidence: 99%

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Highly selective and sensitive reaction of cyanide with 2,2-dihydroxy-1,3-indanedione

Drochioiu

2002

Anal Bioanal Chem

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A novel reaction of cyanide with 2,2-dihydroxy-1,3-indanedione in the presence of sodium carbonate is described. It is highly selective and sensitive, and suitable for the determination of hydrogen cyanide in the environment and free cyanide ions in water, blood, urine, serum, etc. As little as 1.25x10(-7) mol x L(-1) CN(-) (3.25x10(-9) g x mL(-1) cyanide) can be determined by use of this reaction. The color system obeys Beer's law in the range 10 ng x mL(-1) to 1.0 microg x mL(-1) at 510 nm. The molar absorptivity was 8.0x10(4) L x mol(-1) x cm(-1) for a solution of concentration 0.2 microg x mL(-1). All other important analytical properties of the reaction have been studied. It is proposed that the purple color produced under these reaction conditions is that of 2-cyano-1,2,3-trihydroxy-2 H indene.

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“…The absorbance was measured 15 min after the beginning of the reaction. The method using phloroglucinol [9] was used for comparison.…”

Section: Discussionmentioning

confidence: 99%

Section: Advantages Of the Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly selective and sensitive reaction of cyanide with 2,2-dihydroxy-1,3-indanedione

Drochioiu

2002

Anal Bioanal Chem

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“…The results of the determinations were in good agreement with those made with a well-known spectrophotometric method. 11,16,17 Hydroxylamine was added in the ninhydrin reagent only in the case of samples of water being analyzed. Small amounts of copper in blood and serum did not interfere with the determination of cyanide.…”

Section: Application Of the Recommended Methodsmentioning

confidence: 99%

“…Cyanide may be qualitatively 8,9 and/or quantitatively 2,10,11 determined by measuring the absorbance of chromophores formed by the interaction of cyanide ion with suitable reagents. A specific method for cyanide is based on cyanide reactions with p-nitrobenzaldehyde and odinitrobenzene.…”

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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Fast and highly selective determination of cyanide with 2,2-dihydroxy-1,3-indanedione

Drochioiu

2002

Talanta

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Spectrophotometric determination of hydrogen cyanide in air using phloroglucinol

Cited by 8 publications

References 11 publications

Highly selective and sensitive reaction of cyanide with 2,2-dihydroxy-1,3-indanedione

Highly selective and sensitive reaction of cyanide with 2,2-dihydroxy-1,3-indanedione

Cyanide Reaction with Ninhydrin: Elucidation of Reaction and Interference Mechanisms

Fast and highly selective determination of cyanide with 2,2-dihydroxy-1,3-indanedione

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