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首页> 外文期刊>Journal of the Brazilian Chemical Society >Bromine and chlorine determination in cigarette tobacco using microwave-induced combustion and inductively coupled plasma optical emission spectrometry
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Bromine and chlorine determination in cigarette tobacco using microwave-induced combustion and inductively coupled plasma optical emission spectrometry

机译：微波诱导燃烧-电感耦合等离子体发射光谱法测定卷烟中的溴和氯

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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.
机译：微波诱导燃烧（MIC）用于卷烟样品的消解，并通过电感耦合等离子体发射光谱（ICP OES）进一步测定溴和氯。使用20 bar氧气在密闭容器中燃烧质量最高为500 mg的样品。燃烧在不到30秒的时间内完成，分析物被吸收到稀释的（NH4）2CO3溶液中。使用具有相似基质组成的认证参考材料评估准确性，并与使用ICP-MS获得的结果进行比较。使用50 mmol L-1（NH4）2CO3作为吸收溶液并回流5分钟，该协议优于98％。燃烧过程中的温度高于1400 oC，MIC后获得的消化液中的残留碳含量低于1％。最多可以同时处理八个样品，并且单一吸收溶液适用于Br和Cl。 MIC和进一步测定ICP OES时，Br和Cl的定量限分别为12和6μgg-1。

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