Bromine and chlorine determination in cigarette tobacco using microwave-induced combustion and inductively coupled plasma optical emission spectrometry

Journal of the Brazilian Chemical Society

Mesko, Marcia F¹  Müller, Aline L. H¹  Muller, Edson I¹  Universidade Federal de Pelotas, Pelotas, Brazil¹  Flores, Erico M. M¹  Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil¹  Pereira, Juliana S. F¹  Moraes, Diogo P¹  Bizzi, Cezar A¹  Instituto Nacional de Ciência e Tecnologia de Bioanalítica, Campinas, Brazil¹  Universidade Federal de Santa Maria, Santa Maria, Brazil¹ 

关键词: microwave-induced combustion;    cigarette;    bromine;    chlorine;    ICP OES;   

DOI  :  10.1590/S0103-50532011000900005

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The microwave-induced combustion (MIC) was applied for cigarette tobacco samples digestion and further determination of bromine and chlorine by inductively coupled plasma optical emission spectrometry (ICP OES). Samples masses up to 500 mg were combusted in closed vessels using 20 bar of oxygen. Combustion was complete in less than 30 s and analytes were absorbed in diluted (NH4)2CO3 solution. Accuracy was evaluated using certified reference materials with similar matrix composition and comparison with results obtained using ICP-MS. The agreement was better than 98% using 50 mmol L-1 (NH4)2CO3 as absorbing solution and 5 min of reflux. Temperature during combustion was higher than 1400 ºC and the residual carbon content in digest obtained after MIC was lower than 1%. Up to eight samples could be processed simultaneously and a single absorbing solution was suitable for both Br and Cl. Limit of quantification by MIC and further ICP OES determination was 12 and 6 µg g-1 for Br and Cl, respectively.

【 授权许可】

Unknown