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Title Pararosaniline colorimetric determination of sulfur dioxide stabilized with ethanedial
Creator/Author Irgum, K.
Publication Date1985 Jun 01
OSTI IdentifierOSTI ID: 5104710
Other Number(s)CODEN: ANCHA
Resource TypeJournal Article
Resource RelationAnal. Chem. ; Vol/Issue: 57:7
Research OrgUniv. of Umea, Sweden
Subject400104 -- Spectral Procedures-- (-1987) ;570000 -- Health & Safety ;500200 -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (-1989); AIR-- QUANTITATIVE CHEMICAL ANALYSIS;SULFUR DIOXIDE-- ABSORPTION SPECTROSCOPY;SULFUR DIOXIDE-- ALKALINE HYDROLYSIS; ADSORPTION;ANILINE;COLOR;EXPERIMENTAL DATA;FORMALDEHYDE;GLYOXAL;OCCUPATIONAL SAFETY;PH VALUE;SODIUM HYDROXIDES;WORKING CONDITIONS
Related SubjectALDEHYDES;ALKALI METAL COMPOUNDS;AMINES;AROMATICS;CHALCOGENIDES;CHEMICAL ANALYSIS;CHEMICAL REACTIONS;DATA;DECOMPOSITION;FLUIDS;GASES;HYDROGEN COMPOUNDS;HYDROLYSIS;HYDROXIDES;INFORMATION;LYSIS;NUMERICAL DATA;OPTICAL PROPERTIES;ORGANIC COMPOUNDS;ORGANOLEPTIC PROPERTIES;OXIDES;OXYGEN COMPOUNDS;PHYSICAL PROPERTIES;SAFETY;SODIUM COMPOUNDS;SOLVOLYSIS;SORPTION;SPECTROSCOPY;SULFUR COMPOUNDS;SULFUR OXIDES
Description/Abstract A hydroxide-consuming intra-Cannizzaro reaction of ethanedial desorbed from the solid sorbent occurs during the hydrolysis step preceding the color reaction.^A higher initial OH-concentration is therefore needed in the hydrolysis, as compared to methods without ethanedial in the sample.^Hydrolysis time should be kept between 10 s and 5 min for maximum sensitivity.^Optimum pH and formaldehyde concentration during color development were 1.02 and 5 mM, respectively.^The alkaline formaldehyde solution containing 0.5 M NaOH and 20 mM formaldehyde was stable for 1 day at room temperature.^9 references, 4 figures, 1 table.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 1335-1338
System Entry Date2001 May 13

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