Keywords
UV spectrophotometry
water
spectral interferences
How to Cite
Abstract
The present short communication proposes to point out some spectral interferences on nitrate determination in water by means of UV spectrophotometry methods. Two techniques were analysed: the first technique employed absorbance value at 220 nm (with empirical correction in presence of organic material),and for the second one the absorbance value at 205 nm (without any correction factor) was used for reaction reading. Based on the second technique an interference study on chloride ion was performed. Chloride interference was noted at concentrations above 50 mg L-1 approximately. Additionally, some interferences activities from nitrite and surfactants were shallowly investigated.References
1. Baird C. Environmental Chemistry. 2nd ed. New York: W. H. Freeman and Company; 2000.
2. Weyer PJ, Cerhan JR, Kross BC, Hallberg GR, Kantamneni J, Breuer G, etal. Municipal drinking water nitrate level and cancer risk in older women:the Iowa women’s health study. Epidemiology 2001;11:327-38.
3. Ward MH, Mark SD, Cantor KP, Weisenburger DD, Correa-Villasenor A,Law GR, et al. Non-Hodgkin’s lymphoma and nitrate in drinking water. JEpidemiol Community Health 2000;54:772-3.
4. Cocco P, Broccia G, Aru G, Casula P, Muntoni S, Cantor KP, et al. Nitratein community water supplies and incidence of non-Hodgkin’s lymphomain Sardinia, Italy. J Epidemiol Community Health 2003;57:510-1.
5. American Public Health Association (US), American Water Works Association (US), Water Environment Federation (US). Inorganicnon metalic constituents / Nitrate. Eaton AD, Clesceri LS, Greenberg AE,editores. Standard Methods for the Examination of Water and Wastewater 19th ed. Washington (DC): American Public Health Association, American Water Works Association, Water Environment Federation; 1995. p. 4-85 e4-86.
6. Brasil. Portaria nº 518 de 2004 do Ministério da Saúde. Diário Oficial da República Federativa do Brasil, Poder Executivo, Brasilia, DF, 26 mar.2004.
7. Mazon EMA, Oliveira ACG, Brígido BM, Freitas VPS. Estudo comparativo de métodos para a determinação de nitrato em águas para consumo humano. Rev Inst Adolfo Lutz 2005;64:110-6.
8. Bastian R, Webwerling R, Palilla F. Ultraviolet spectrophotometric determination of nitrate - Application to analysis of alkaline earthcarbonates. Anal Chem 1957;29:1795-7.
9. Goldman E, Jacobs R. Determination of nitrates by ultraviolet absorption. J Am Water Works Assoc 1961;53:187-91.
10. American Public Health Association (US), American Water WorksAssociation (US), Water Pollution Control Federation (US). Physical andchemical examination of natural and treated waters in the absence of grosspollution / Nitrogen (Nitrate). Taras MJ, Greenberg AE, Hoak RD, RandMC, editores. Standard Methods for the Examination of Water andWastewater. 13th ed. Washington (DC): American Public Health AssociationUS), American Water Works Association (US), Water Pollution Control Federation (US); 1971. p. 237-9.
11. Instituto Adolfo Lutz. Métodos físico-químicos para análise de alimentos 4a ed. Brasília: Ministério da Saúde / Agência Nacional de Vigilância Sanitária; 2005.
12. Atkins P, Jones L. Princípios de Química - Questionando a vida modernae o meio ambiente. Cararelli I, Zukerman-Spector J, Camillo RL, Lemos FCD, Santos RHA, Gambardella MTP et al tradutores. Porto Alegre: Bookman; 2002.
13. Shriver DF, Atkins PW. Inorganic Chemistry. 3rd ed. Oxford: Oxford University Press; 1999. p.384.
14. Miller JN, Miller JC. Statistics and Chemometrics for Analytical Chemistry.4th ed. Dorchester: Pearson Education Limited; 2000.
15. Karlsson M, Karlberg B, Olsson RJO. Determination of nitrate in municipal waste water by UV spectroscopy. Anal Chim Acta 1995;312:107-13.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2006 Instituto Adolfo Lutz Journal