Quantitative determination of micro and semi-micro concentrations of acylating agents by 4-(p-nitrobenzyl)pyridine reagent

Agree, A.M.; Meeker, R. L.

doi:10.1016/0039-9140(66)80163-7

Cited by 15 publications

(2 citation statements)

References 4 publications

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“…Other reactive amines such as N--ethyl-N-(2-hydroxyethyl) aniline, N,N-dimethyl-2-naphthylamine or N,N-dimethyl-3-aminophenol [4] are used to a lesser extent. The second process is based on the color reaction of phosgene or diphosgene with 4-(p-nitrobenzyl) pyridine, a group reagent for alkylation and acylation agents [5][6][7]. The reaction gives yellow to orange-colored urea-type product, which passes into a meso-quinoid form of methine dye.…”

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confidence: 99%

Detection tube with composite carrier for detection of phosgene and diphosgene in air

Pitschmann

Tušarová

Kobliha

et al. 2012

Hem Ind

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A new highly sensitive detection tube for measurement of concentration of phosgene and diphosgene in air has been developed. The detection is based on chemical reaction of 4-(p-nitrobenzyl)pyridine and N-phenylbenzylamine which with phosgene (diphosgene) give characteristic red methine dye. As a carrier serves spherical granules (pellets) of composite material prepared by granulation of microcrystalline cellulose with MgO. This new indication filling is stable, resistant to interferences and climatic influences. The detection limit (0.05 mg.m-3) meets the requirements for conducting hygienic checks of air quality in the workplace environment. In addition, the tube allows a prolonged and continuous monitoring of phosgene and diphosgene in air for at least 240 minutes

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confidence: 99%

Detection tube with composite carrier for detection of phosgene and diphosgene in air

Pitschmann

Tušarová

Kobliha

et al. 2012

Hem Ind

View full text Add to dashboard Cite

show abstract

“…The reagent NBP was chosen because of its wide application in the determination of concentrations of alkylating and acylating agents (5)(6)(7)(8). In general, the alkylating or acylating agent attacks the nitrogen of the pyridine ring thereby forming a pyridine salt.…”

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confidence: 99%