Development of a monitoring tape for the determination of formaldehyde gas in fumigation.

Nakano, Nobuo; Ishikawa, Masatoshi; Kobayashi, Yoshio; Nagashima, Kunio

doi:10.2116/bunsekikagaku.43.139

Bunseki kagaku

1994

DOI: 10.2116/bunsekikagaku.43.139

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Development of a monitoring tape for the determination of formaldehyde gas in fumigation.

Nobuo Nakano¹,

Masatoshi Ishikawa²,

Yoshio Kobayashi³

et al.

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Cited by 5 publications

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“…15 HCHO in sample gas reacts with hydroxylamine sulfate in the tape to produce sulfuric acid, and hence the color of tape changed.…”

mentioning

confidence: 99%

Development of a Monitoring Tape for Formaldehyde Using Hydroxylamine Sulfate and Methyl Yellow

Nakano¹,

Ishikawa²,

Kobayashi

et al. 1994

ANAL. SCI.

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A porous cellulose tape impregnated with a coloring solution that includes hydroxylamine sulfate, Methyl Yellow (pH indicator; pH 2.9-4.0, red-yellow), glycerin and methanol has been developed to provide a highly sensitive means of detecting formaldehyde gas. Formaldehyde reacts with hydroxylamine sulfate to produce sulfuric acid. When a sample including formaldehyde was passed through the tape, the color of the tape changed from yellow to red. The degree of color change was proportional to the concentration of formaldehyde at a constant sampling time and flow rate. The degree of color change could be recorded by measuring the intensity of reflecting light (555 nm). No interference was observed from carbon monoxide (100 ppm), nitrogen monoxide (50 ppm), nitrogen dioxide (105 ppm), carbon dioxide (4.9%), hydrogen (100%), hydrogen sulfide (32 ppm), or hydrogen fluoride (6 ppm). The response of acetaldehyde and propionaldehyde were one fortieth and three-hundredths of that of formaldehyde, respectively. Reproducibility tests showed that the relative standard deviation of relative intensity (n=10) was 3.4% for 4 ppm formaldehyde. The detection limit was 0.1 ppm for formaldehyde at a sampling time of 5 min and a flow rate of 400 ml/min.

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“…15 HCHO in sample gas reacts with hydroxylamine sulfate in the tape to produce sulfuric acid, and hence the color of tape changed.…”

mentioning

confidence: 99%

Development of a Monitoring Tape for Formaldehyde Using Hydroxylamine Sulfate and Methyl Yellow

Nakano¹,

Ishikawa²,

Kobayashi

et al. 1994

ANAL. SCI.

Self Cite

View full text Add to dashboard Cite

show abstract

Development of a monitoring tape for phosgene in air

Nakano

Yamamoto²,

Kobayashi

et al. 1995

Talanta

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Development of a monitoring tape for ammonia gas in air using Rose Bengal

Nakano¹,

Kobayashi²,

Nagashima³

1994

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Development of a monitoring tape for the determination of formaldehyde gas in fumigation.

Cited by 5 publications

References 0 publications

Development of a Monitoring Tape for Formaldehyde Using Hydroxylamine Sulfate and Methyl Yellow

Development of a Monitoring Tape for Formaldehyde Using Hydroxylamine Sulfate and Methyl Yellow

Development of a monitoring tape for phosgene in air

Development of a monitoring tape for ammonia gas in air using Rose Bengal

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