Abstract
The modified pararosaniline method for formaldehyde which uses no poisonous mercury reagent is not affected by phenol/formaldehyde ratios ranging from 1 to 100, whereas such ratios caused almost total inhibition of the chromotropic acid method, even if water, 1% sodium bisulfite or 0.01 N H2SO4 were used to simulate different collection media. No influence of phenol also occurred even for 11 days of storage at room temperature before analysis.
Publication types
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Comparative Study
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Air Pollutants, Occupational / analysis*
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Drug Stability
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Formaldehyde / analysis*
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Indicators and Reagents
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Naphthalenesulfonates*
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Phenols / analysis
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Rosaniline Dyes*
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Spectrophotometry
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Toluidines*
Substances
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Air Pollutants, Occupational
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Indicators and Reagents
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Naphthalenesulfonates
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Phenols
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Rosaniline Dyes
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Toluidines
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Formaldehyde
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pararosaniline
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chromotropic acid