Open AccessEVALUATION OF DIFFERENT COLORIMETRIC REAGENTS FOR THE DETERMINATION OF FORMALDEHYDE IN INDOOR ENVIRONMENTS
Author(s) -
Darllene Silveira,
Jéssica Oliveira Fernandes,
Elisabete Alves Pereira
Publication year - 2015
Publication title -
química nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.214
H-Index - 73
eISSN - 1678-7064
pISSN - 0100-4042
DOI - 10.5935/0100-4042.20150078
Subject(s) - formaldehyde , reagent , indoor air , colorimetry , environmental science , chromatography , environmental chemistry , chemistry , computer science , environmental engineering , organic chemistry
Different colorimetric reagents, the Nash reagent (acetylacetone/ammonia solution), Purpald (4-amino- 3-hydrazino-5-mercapto-1,2,4-triazole/sodium hydroxide solution) and 3-methyl-2-benzothiazolinone hydrazone (MBTH), were evaluated for the determination of formaldehyde in indoor air samples. Analytical parameters such as color stability of the product formed, sampling efficiency and reaction conditions were compared for the methodologies. Several method validation parameters were determined for the three colorimetric methods. The MBTH method showed better results and was used for the determination of formaldehydes in indoor environments.