The Determination of Trace Levels of Cyanide by Ion Chromatography with Electrochemical Detection

Koch, William F.

doi:10.6028/jres.088.008

Cited by 17 publications

(5 citation statements)

References 21 publications

(14 reference statements)

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“…Willison and Clarke (156) also analyzed atmospheric aerosols for Cl", N032", and S042' using single column or nonsuppressed ion chromatography. Koch (157) improved a method for determining trace cyanide using IC and a electrochemical detector. Lai et al (158) used multidimensional column IC to separate and detect BF4~a nd P043".…”

Section: General Review Literaturementioning

confidence: 99%

Geological and inorganic materials

Moore¹,

Canepa²

1985

Anal. Chem.

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Section: General Review Literaturementioning

confidence: 99%

Geological and inorganic materials

Moore¹,

Canepa²

1985

Anal. Chem.

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“…Generally, titration methods such as the classical Liebig method which involves use of a silver ion-containing ammoniacal solution to titrate for cyanide ions, forming silver iodide at the end point, 5 and a modified method which uses a rhodanine indicator 6 have been used for cyanide detection. These provide an easy and cost-effective method for cyanide testing however, have limitations pertaining to point of testing, minimum detection limits 7 and realtime measurements. Modifications have also been made to the classical titration methods, such as the use potentiometric end-point detection.…”

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confidence: 99%

TiO₂ Nanotube-Based Sensor for the Detection of Cyanide in Water

Tembo

Dhabarde

Subramanian

2021

J. Electrochem. Soc.

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Cyanide is an acutely toxic compound capable of spreading to ground and surface waters more easily than other industrial contaminants. Real-time monitoring of cyanide concentrations calls for a robust and quick method for cyanide detection in water. This work focuses on the application of anodized titanium dioxide (TiO2) nanotubes as a substrate, with suitable and relatively inexpensive additives, for the sensitive and selective electrochemical detection of cyanide in water. The TiO2 nanotubes were modified by the addition of iron (Fe) and sulfur (S) as sensing elements. Characterization of the prepared sensing platform was performed using X-ray diffraction and electron microscopy. Current-time measurements indicated that i) increasing cyanide concentration can perturb the current proportionally, ii) the differential in the current can be used as a calibration for quantitative detection of cyanide, and iii) the sensor is highly selective even in the presence of interfering species. A cyanide detection limit of 0.49 μM and a sensitivity of −13.8 mAcm−2 μM−1 were established. The sensor response indicated that an Fe-S-TiO2 nanotube sensing electrode could effectively and repeatedly be used over a period of several months for the sensing of cyanide concentrations lower than the recommended WHO and USEPA limits in water.

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“…The drawback of the method is that it does not separate cyanide from sulfide since H2S gas also diffuses across the membrane. Ion chromatography (IC) methods have been shown to be advantageous in the separation of cyanide from sulfide (11)(12)(13)(14). However, IC methods may be subject to interferences if used without any sample 0003-2700/90/0362-0766$02.50/0 © 1990 American Chemical Society pretreatments because of high concentrations of ions often present in wastewaters.…”

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confidence: 99%