On-line determination of cyanide in the presence of sulfide by flow injection with pervaporation

Sulistyarti, Hermin; Cardwell, Terence J.; Castro, M.D. Luque de; Kolev, Spas D.

doi:10.1016/s0003-2670(99)00158-0

Cited by 38 publications

(19 citation statements)

References 20 publications

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“…(d) A hexagonal Perspex pervaporation unit, that also facilitates the circulation of the acceptor solution, in which the donor and acceptor chambers have constant depths (5 and 1 mm, respectively) has also been proposed [23,24].…”

Section: Body Of the Analytical Pervaporatormentioning

confidence: 99%

“…It is expected that a larger pore size will require lower pore density to ensure acceptable mechanical stability of the membrane. This means that the overall area of the pores through which gas diffusion takes place could even decrease with increased pore size and, hence, give lower permeability [23]. In another study concerning the determination of ammonia in the presence of surfactants by FI-pervaporation with membranes whose faces have different porosity, higher sensitivity was obtained when the PTFE membrane was positioned so that the backing faced the donor chamber.…”

Section: Reviewmentioning

confidence: 99%

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Analytical pervaporation: An advantageous alternative to headspace and purge-and-trap techniques

Castro

Gámiz‐Gracia

2000

Chromatographia

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Section: Body Of the Analytical Pervaporatormentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

Analytical pervaporation: An advantageous alternative to headspace and purge-and-trap techniques

Castro

Gámiz‐Gracia

2000

Chromatographia

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“…7 In environmental wastes, free cyanide can be determined after using time consuming techniques like solvent extraction, gas dialysis, microdiffusion, pervaporation. 8 Without using these techniques, any of above mentioned methods aren't usable in the presence of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Cyanide Determination With a Modified Ninhydrin Reagent Using N-Acetyl Cysteine in the Presence of Heavy Metal Ions

Mihaescu

2010

J. Chil. Chem. Soc.

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Sensitive and selective, but fast and simple assays of cyanide ion in waste and natural waters, as well as in biological samples are required in case of accidental pollution with such species. Cyanide reaction with ninhydrin has been recommended for instant detection of small traces of cyanide (detection limit 1.5 ng ml -1 ). However, the oxidizers and heavy metal ions, such as Hg, Cu, Ag may interfere with the determinations. Therefore, we report here cyanide determination with ninhydrin and its usage in monitoring polluted water with heavy metals. The effect of heavy metals and SH-compounds were studied in order to increase the method range of use. N-acetyl cysteine proved to be a selective reagent for protection of cyanide detection and determination against the interference of heavy metal ions.

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“…A number of different analytical approaches have been previously reported in the literature for detecting cyanide in various sample matrices. Examples include colorimetric [1][2][3], electrochemical [4,5], fluorescence [6][7][8][9] and biosensor [10,11] detection approaches. Some of the problems associated with these previously reported methods include lengthy analysis times, insufficient selectivity, unsuitability for on-line analysis, or inadaptability to both aqueous and vapor phase forms of cyanide.…”

Section: Introductionmentioning

confidence: 99%

Vapor and liquid phase detection of cyanide on a microchip

Lu¹,

Collins

Evans³

et al. 2004

Electrophoresis

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A capillary electrophoresis microchip is used to selectively and sensitively monitor cyanide levels in both vapor (HCN((g))) and aqueous (NaCN in drinking water) phases. Laser-induced fluorescence detection is applied using a violet diode laser to monitor the fluorescent isoindole derivative formed by the reaction of cyanide with 2,3-naphthalenedicarboxaldehyde (NDA) and taurine. Air sampling of hydrogen cyanide is achieved using a miniature impinger (2 mL), giving collection efficiencies as high as 79% for a sampling rate of 1.0 L/min and a 10 s sampling time (relative standard deviation RSD: 2.7% for n = 5). Following the addition of NDA and taurine to either the vapor phase impinger sample or an aqueous drinking water sample, the NDA/cyanide derivative can be detected in just over 40 s on the microchip, giving a detection limit of 0.56 microg/L and a linear dynamic range from 0.56 microg/L-2.4 mg/L. The detection limit for hydrogen cyanide in air was determined to be 2.3 ppb (mole%). On-chip derivatization of cyanide by NDA was successful, although a 50% decrease in signal intensity was observed due to insufficient time for completion of the reaction on the microchip. A number of different interferents were examined, and only iron(II) and chlorine showed any interference due to their capability for masking the presence of cyanide by reacting with free cyanide in solution.

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On-line determination of cyanide in the presence of sulfide by flow injection with pervaporation

Cited by 38 publications

References 20 publications

Analytical pervaporation: An advantageous alternative to headspace and purge-and-trap techniques

Analytical pervaporation: An advantageous alternative to headspace and purge-and-trap techniques

Cyanide Determination With a Modified Ninhydrin Reagent Using N-Acetyl Cysteine in the Presence of Heavy Metal Ions

Vapor and liquid phase detection of cyanide on a microchip

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