| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Gigante, A. C. | |
| dc.creator | Gotardo, M. A. | |
| dc.creator | Tognolli, J. O. | |
| dc.creator | Pezza, Leonardo | |
| dc.creator | Pezza, Helena Redigolo | |
| dc.date | 2014-05-20T15:22:46Z | |
| dc.date | 2016-10-25T17:56:33Z | |
| dc.date | 2014-05-20T15:22:46Z | |
| dc.date | 2016-10-25T17:56:33Z | |
| dc.date | 2004-05-01 | |
| dc.date.accessioned | 2017-04-05T23:38:31Z | |
| dc.date.available | 2017-04-05T23:38:31Z | |
| dc.identifier | Microchemical Journal. Amsterdam: Elsevier B.V., v. 77, n. 1, p. 47-51, 2004. | |
| dc.identifier | 0026-265X | |
| dc.identifier | http://hdl.handle.net/11449/33697 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/33697 | |
| dc.identifier | 10.1016/j.microc.2003.12.002 | |
| dc.identifier | WOS:000221065100008 | |
| dc.identifier | 0000-0003-0197-7369 | |
| dc.identifier | http://dx.doi.org/10.1016/j.microc.2003.12.002 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/877762 | |
| dc.description | In the present study. a spectrophotometric method for the determination of formaldehyde by using chromotropic acid was devised. in which the use of potentially hazardous and corrosive concentrated sulfuric acid was eliminated and advantageously C replaced by a mixture of H, concentrated H3PO4 and H2O2. The reaction between formaldehyde and chromotropic acid (CA) in a cone phosphoric acid medium was accelerate by irradiating the mixture with microwave energy for 35 s (1100 W), producing a violetred compound (lambda(max)=570 nm). Beer's Law is obeyed in a concentration range of 0.8-4.8 mg 1(-1) of formaldehyde with a good correlation coefficient (r = 0.9968). The proposed method was applied in the analysis of formaldehyde in commercial disinfectants. Recoveries were within 98.0-100.4%, with standard deviations ranging from 0.03 to 0.13%. (C) 2003 Elsevier B.V All rights reserved. | |
| dc.language | eng | |
| dc.publisher | Elsevier B.V. | |
| dc.relation | Microchemical Journal | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | formaldehyde | |
| dc.subject | chromotropic acid | |
| dc.subject | spectrophotometry | |
| dc.subject | microwave oven | |
| dc.title | Spectrophotometric determination of formaldehyde with chromotropic acid in phosphoric acid medium assisted by microwave oven | |
| dc.type | Otro | |
