2009
DOI: 10.1590/s0100-40422009000400011
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Estudo comparativo de métodos de preparo de amostras de tinta para a determinação de metais e metalóides por técnicas de espectrometria atômica

Abstract: Estudo comparativo dE métodos dE prEparo dE amostras dE tinta para a dEtErminação dE mEtais E mEtalóidEs por técnicas dE (3) decomposition in open vessel using HNO 3 + HF and ashing. Paints of different types and colours were analyzed, in which several elements were determined using inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP OES). It was observed that method (1) is appropriate for trace, minor and major elements determination, while m… Show more

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Cited by 11 publications
(8 citation statements)
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“…2,8,11,12 Some sample treatment studies for the determination of Ti in TiO 2 pigments, paints, ilmenites and other materials involve treatment of the samples with potassium bisulfate or potassium hydrogen sulphate followed by fusion, 13,14 microwave assisted digestion or hot acid digestion. 13,15 Murthy et al 13 employed ICP OES for the determination of Ti in ilmenites having 55-56% m m À1 TiO 2 content. Dissolution of the samples was optimized in phosphoric acid by boiling for 15-20 minutes.…”
Section: Introductionmentioning
confidence: 99%
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“…2,8,11,12 Some sample treatment studies for the determination of Ti in TiO 2 pigments, paints, ilmenites and other materials involve treatment of the samples with potassium bisulfate or potassium hydrogen sulphate followed by fusion, 13,14 microwave assisted digestion or hot acid digestion. 13,15 Murthy et al 13 employed ICP OES for the determination of Ti in ilmenites having 55-56% m m À1 TiO 2 content. Dissolution of the samples was optimized in phosphoric acid by boiling for 15-20 minutes.…”
Section: Introductionmentioning
confidence: 99%
“…Norris 14 described a method for the determination of Ti in TiO 2 pigments and other materials wherein the sample was initially fused with potassium hydrogen sulphate, dissolved in 5% v/v H 2 SO 4 , and treated with a solution of CrCl 2 , followed by automatic potentiometric titration with 0.0625 mol L À1 FeNH 4 (SO 4 ) 2 $12H 2 O. 14 Bentlin et al 15 determined Ti in paints (16% m m À1 Ti) following their decomposition by ashing with HNO 3 and HF in an open vessel. 15 Other studies report dissolution methods of TiO 2 employing inorganic salts and/or organic reagents, but they are either too slow or non-quantitative.…”
Section: Introductionmentioning
confidence: 99%
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“…Após serem injetados na pele permanecem em estado sólido na derme por serem insolúveis, não sendo removidos pelo sistema de defesa. (6,10) Os pigmentos mais utilizados nas tintas de tatuagens são os inorgânicos como o carbono, o sulfeto de mercúrio (vermelho), cobalto (azul), sulfeto de cádmio (amarelo), óxido de cromo (verde), hidrato de ferro (ocre) e óxido ferro, e orgânicos como o sândalo (vermelho) e o pau-brasil (vermelho). (12,13) …”
unclassified
“…Este estudo foi realizado utilizando as amostras de giz pastel branco e vermelho. As amostras de giz pastel foram tratadas de acordo com o procedimento ASTM D335-85a descrito por Bentlin et al [94] (Seção 3.5.2). Alíquotas de 10 µL dessas amostras após o procedimento de extração ácida foram transferidas para a célula eletroquímica contendo 10 mL de tampão acetato (pH = 5,5) e a quantificação de zinco foi realizada através do método de adição de padrões empregando o EPCAmbBi como eletrodo de trabalho.…”
Section: Tempo De Extração / Minunclassified