Colorimetric Determination of Ammonia and Cyanate

Kruse, J. M.; Mellon, M. G.

doi:10.1021/ac60080a012

Cited by 62 publications

(20 citation statements)

References 5 publications

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“…After the period mentioned another method was used, in which the content of ammonium is determined with pyrazolon and extraction of the coloured compound in carbon tetrachloride according to KRUSE and MELLON [25]. However, this method proved to be unsuitable for samples with high content of nitrogenous organic matter, which is easily decomposed in the strongly alkaline solution at the distillation.…”

Section: Methodsmentioning

confidence: 99%

Limnological studies of lake Norrviken, a eutrophicated Swedish lake

Ahlgren¹

1967

Schweiz. Z. Hydrologie

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Section: Methodsmentioning

confidence: 99%

Limnological studies of lake Norrviken, a eutrophicated Swedish lake

Ahlgren¹

1967

Schweiz. Z. Hydrologie

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“…NH 3 determination is usually performed using the phenol-hypochlorite reaction [86], as well as the CoCl 2 -based [87], Nessler [88], and Indophenol methods [89]. Mass spectrometry, nuclear magnetic resonance (NMR) spectroscopy, liquid and gas chromatography are often used as the quantitation methods for substrate and product assays [90].…”

Section: Introductionmentioning

confidence: 99%

Nitrilases in nitrile biocatalysis: recent progress and forthcoming research

et al. 2012

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Over the past decades, nitrilases have drawn considerable attention because of their application in nitrile degradation as prominent biocatalysts. Nitrilases are derived from bacteria, filamentous fungi, yeasts, and plants. In-depth investigations on their natural sources function mechanisms, enzyme structure, screening pathways, and biocatalytic properties have been conducted. Moreover, the immobilization, purification, gene cloning and modifications of nitrilase have been dwelt upon. Some nitrilases are used commercially as biofactories for carboxylic acids production, waste treatment, and surface modification. This critical review summarizes the current status of nitrilase research, and discusses a number of challenges and significant attempts in its further development. Nitrilase is a significant and promising biocatalyst for catalytic applications.

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“…Since aqueous NH 4 + is controlled by regulation, many authorities associated with water regularly collect water samples and analyze their NH 4 + concentration. In general, the NH 4 + concentration of a water sample can be determined by a titrimetric method [5], the method using an ammoniaselective electrode [6], or a colorimetric method [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Determination of NH₄⁺ in Environmental Water with Interfering Substances Using the Modified Nessler Method

Jeong¹,

Park²,

Kim

2013

Journal of Chemistry

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Nitrogen is an essential element in the environment. If excess nitrogen includingNH4 +is present in water, however, it can result in algae blooming and eventually the destruction of the aquatic ecosystem. Therefore, the determination ofNH4 +in streams, lakes, and effluents of the treatment facilities has long been carried out. The Nessler method is the most common spectrophotometric method to measureNH4 +in water. However, the result of the method becomes inaccurate if there are interfering substances such as Cl2, Cl−, hardness-causing compounds (e.g., Mg2+), and Fe2+in target water samples. In this study, therefore, the traditional Nessler method has been modified to eliminate the effects of interfering substances; the so-called MS was added to water samples. In addition, the polyvinyl alcohol reagent as a dispersing agent was added to water samples to increase the sensitivity and reproducibility of the method. The modified method could successfully analyzeNH4 +of water samples even with the interfering substance at high concentration.

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Colorimetric Determination of Ammonia and Cyanate

Cited by 62 publications

References 5 publications

Limnological studies of lake Norrviken, a eutrophicated Swedish lake

Limnological studies of lake Norrviken, a eutrophicated Swedish lake

Nitrilases in nitrile biocatalysis: recent progress and forthcoming research

Determination of NH₄⁺ in Environmental Water with Interfering Substances Using the Modified Nessler Method

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Colorimetric Determination of Ammonia and Cyanate

Cited by 62 publications

References 5 publications

Limnological studies of lake Norrviken, a eutrophicated Swedish lake

Limnological studies of lake Norrviken, a eutrophicated Swedish lake

Nitrilases in nitrile biocatalysis: recent progress and forthcoming research

Determination of NH4+ in Environmental Water with Interfering Substances Using the Modified Nessler Method

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Product

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Determination of NH₄⁺ in Environmental Water with Interfering Substances Using the Modified Nessler Method