Spectrophotometric determination of cyanamide

Buyske, D. A.; Downing, Vincent.

doi:10.1021/ac50153a027

Cited by 21 publications

(7 citation statements)

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“…Cyanamide can also be determined by direct HPLC with UV detection at 200 nm [83]. Traces of cyanamide can be analyzed spectrophotometrically after derivatization with pentacyanoammineferrate(II) [84]. Due to its low UV absorption, direct HPLC determination is not generally suitable.…”

Section: Discussionmentioning

confidence: 99%

Cyanamides

Güthner¹,

Mertschenk²

2006

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Calcium Cyanamide 1.1. Physical Properties 1.2. Chemical Properties 1.3. Production 1.3.1. Overall Process 1.3.2. Manufacture 1.3.3. Processing of Technical Calcium Cyanamide 1.4. Quality Specifications 1.5. Storage and Transportation 1.6. Uses 1.7. Legal Aspects 2. Cyanamide 2.1. Physical Properties 2.2. Chemical Properties 2.3. Production 2.4. Analysis 2.5. Storage and Transportation 2.6. Uses 2.7. Legal Aspects 3. Dicyandiamide 3.1. Physical Properties 3.2. Chemical Properties 3.3. Production 3.4. Quality Specifications and Analysis 3.5. Storage and Transportation 3.6. Uses 3.7. Legal Aspects 4. Substituted Cyanamides 5. Toxicology and Occupational Health Calcium cyanamide is produced from calcium carbide and nitrogen gas by an exothermic solid nitrogenation at 1000°C. It is used as a slow release nitrogen fertilizer with beneficial side effects against soilborne deseases. In chemical industry, it is the base for cyanamide and thiourea chemistry. Cyanamide is a fairly stable, toxic substance obtained from calcium cyanamide by reaction with water and carbon dioxide. It has vast applications in industrial nitrogen organic chemistry, and is also directly used as a plant protection agent. Dicyandiamide is derived from cyanamide by dimerization in presence of alkali. The nontoxic compound has found widespread industrial applications in resins, plastics, water treatment, and pharmaceuticals.

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Section: Discussionmentioning

confidence: 99%

Cyanamides

Güthner¹,

Mertschenk²

2006

Ullmann's Encyclopedia of Industrial Chemistry

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“…Early attempts to apply the colorimetric procedure of Buyske and Downing (2) directly to aqueous extracts of cottonseed were unsuccessful because of the presence of sample extractives which caused high control values for untreated samples.…”

Section: Determination Of Cyanamide Residues On Ginned Cottonseedmentioning

confidence: 99%

Defoliant Residues, Determination of Cyanamide Residues on Ginned Cottonseed

Steller¹,

Frederick²,

Morgan³

1965

J. Agric. Food Chem.

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translocated into the terminal buds and subtending internodes in amounts that inhibited terminal bud growth and induced internodal abscission. During the development of these responses, the lateral buds apparently did not absorb sufficient A'-(3-nitro-l -naphthyl)phthalamic and Ar-(5 -acenaphthenyl) phthalamic acids at the dosage levels used to inhibit their subsequent growth. It is probable that any residual amounts of these compounds became inactive during this period as far as growth inhibition was concerned, since there was no evi-DEFOLIANT RESIDUES dence of inhibitory or formative effects on axillary buds that developed subsequently.

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“…7 The method is ,peclific for cyanamide and was not subject to interferences by other organic constituents of NO production wastewater. Detection limits were below 0.1 mg'L unless high concentrations of inorganic salts were present.…”

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