Grupo Baccan de Química Analítica, Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil.
Colegiado de Licenciatura em Química, Universidade Federal do Vale do São Francisco, Campus Serra da Capivara, São Raimundo Nonato, PI, Brazil.
J Anal Toxicol. 2020 Apr 2;44(5):514-520. doi: 10.1093/jat/bkz106.
Smoking is a public health problem and an important source of exposure to toxic metals. This work describes an efficient analytical method comparable to the ones based on atomic emission techniques for the determination of chromium in different constituent parts of cigarette samples (tobacco, filters and ashes) using electrothermal vaporization-atomic absorption spectrometry. The method was evaluated using 12 samples, and the results showed recovery values between 83 and 107%. The accuracy was also evaluated using a reference sample of tomato leaves (NIST SRM 1573a), which proved the efficiency of the method. The limits of detection of the developed method were 20.4, 75.8 and 80.7 ng g-1 for tobacco, filter and cigarette ash samples, respectively. The average chromium values found for the analyzed samples were in the range of 0.96 to 3.85 and from 0.32 to 0.80 μg/cigarette for tobacco and ashes, respectively. For most pre-burn and post-burn filter samples, the values of chromium concentration remained below limits of detection. The developed method presented adequate results about precision and accuracy, demonstrating its applicability in the determination of chromium in cigarette samples.
吸烟是一个公共卫生问题，也是接触有毒金属的重要来源。本工作描述了一种使用电热蒸发-原子吸收光谱法测定香烟样品（烟草、滤嘴和烟灰）不同成分中铬的高效分析方法，该方法可与基于原子发射技术的方法相媲美。该方法使用 12 个样品进行了评估，结果表明回收率在 83%至 107%之间。使用番茄叶（NIST SRM 1573a）参考样品评估了准确性，证明了该方法的效率。开发方法的检出限分别为烟草、滤嘴和烟灰样品中的 20.4、75.8 和 80.7 ng g-1。分析样品中发现的铬平均值范围分别为 0.96 至 3.85 和 0.32 至 0.80 μg/支，分别为烟草和烟灰。对于大多数预燃烧和后燃烧的滤嘴样品，铬浓度值仍低于检出限。所开发的方法在精密度和准确性方面表现出良好的结果，证明其在香烟样品中测定铬的适用性。
