Nitrate and nitrite determination in fish skin teas employed for asthma treatment in the southern region of Rio Grande do Sul

Quimica nova

Bastos, Ademir Larrea¹  Baisch, Ana Luiza Muccilo¹  Soares, Leonor Almeida de Souza¹  Furlong, Eliana Badiale¹  Burkert, Janaína Fernandes de Medeiros¹ 

[1] Universidade Federal do Rio Grande, Rio Grande, Brasil

关键词: nitrate;    nitrite;    fish skin.;   

DOI  :  10.1590/S0100-40422006000500002

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The objectiveof this paper was to determine nitrate and nitrite anions in toasted fish skintea, which the population of southern Rio Grande do Sul believes to have pharmacologicalproperties for trating asthma. Two methods were compared, an official and onedescribed by Guozhen et al., that has the advantage of not needing reductionof nitrate to nitrite on a Cd column. The samples were the skin of the fishspecies Balistes capriscus (peixe porco) and Menticirrhus littoralis(papa-terra), both crude and toasted, as traditionally used. The method of Guozhenet al. was used due to its performance (detection limit 0.005 µmol/LNO3- and 0.02 µmol/L - NO2-and mean recuperation of 100 and 97% respectively for each anion) and resultssimilar to those of the official methods under conditions used by the population,the estimated daily intake, of the teas is equivalent to 0.03 to 0.05 mg ofnitrate and 0.007 to 0.014 mg of nitrite. These values are in accord with safetyrecommendations and don't represent a health risk.

【 授权许可】

CC BY