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O uso de adoçantes líquidos com sacarina sódica é uma questão de saúde pública pela relação com obesidade e fonte de sódio. Os níveis de sacarina foram avaliados em quatro marcas de diferentes fabricantes em amostras adquiridas no comércio de Vitória/ES, entre os anos de 2006 e 2008. Foram encontrados níveis com valores entre 260 e 505 vezes acima da Resolução-RDC N0 8, 25/03/2008 (ANVISA), que é de 0,015 g/100 mL para sacarina e seus sais derivados. O perfil das amostras cristalizadas dos adoçantes foram avaliados por espectroscopia na região do infravermelho e por difração de raio-X de pó. A seletividade do método clássico de precipitação com AgNO3 também foi verificada por essas técnicas aplicadas nos precipitados de sacarinato de prata.The use of sweeteners liquid from saccharin sodium is a public health issue by the relationship with obesity and a source of sodium. The levels of saccharin were studied in four different manufacturers in samples from trade in Vitória / ES, between years 2006 and 2008. Levels were found with values between 260 and 505 above of Resolution RDC N0-8, 25/03/2008 from ANVISA, which is 0,015 g/100 mL for saccharin and its salts. The profile of the crystallized sweeteners samples were evaluated by infrared spectroscopy and powder X-ray diffraction. The selectivity of the classic method of precipitation with AgNO3 was also verified by the techniques applied in silver saccharinate precipitates.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:13:40Z No. of bitstreams: 0 Made available in DSpace on 2014-02-26T17:13:40Z (GMT). No. of bitstreams: 0 Previous issue date: 1997-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:22:38Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T15:22:38Z (GMT). No. of bitstreams: 0 Previous issue date: 1997-01-01 Reactions of [WC1(CO)(3)(bipy)(HgCl)], [bipy = 2,2 -bipyridine], with thioureas were performed giving compounds of the type [WCl(CO)(3)(bipy)(HgCl)L], [L = thiourea (tu); N-methylthiourea (mtu); N,N-dimethyithiourea (dmtu)] in which the coordination sphere of the tungsten atom remained unchanged. The coordination of the thioureas to mercury atom was proved to occur in accord to infrared spectra, through the sulphur atom. Federacao Fac Isoladas Araraquara, FEFIARA, BR-24802320 Araraquara, SP, Brazil UNESP, Inst Quim, Dept Quim Geral & Inorgan, BR-14800900 Araraquara, SP, Brazil UNESP, Inst Quim, Dept Quim Geral & Inorgan, BR-14800900 Araraquara, SP, Brazil