烟草科技2016，Vol.49Issue(7)：70-76,7.DOI:10.16135/j.issn1002-0861.20160710
造纸法再造烟叶工艺过程中铅、镉含量的测定
Determination of lead and cadmium contents during paper-making reconstituted tobacco process
摘要
Abstract
In order to investigate the variations of lead(Pb)and cadmium(Cd)contents during the production of paper-making reconstituted tobacco,an analytical method based on wet digestion-graphite furnace atomic absorption spectrometry to quantify the Pb and Cd contents in a series of samples was developed by optimizing wet digestion system,ashing temperature and atomization temperature. The transfer patterns of Pb and Cd during the production of paper-making reconstituted tobacco were also studied using the method. The results showed that: 1)The optimized acid digestion systems for Pb and Cd in the samples were 5 mL HNO3 and 1 mL H2O2,the ashing temperatures for Pb and Cd were 850 ℃ and 500 ℃,respectively,and the atomization temperatures at 1 600 ℃ and 1 500 ℃,respectively. 2)The detection limits of Pb and Cd were 0.24 and 0.028μg/L with the relative standard deviations(RSDs)less than 5%, and the recoveries in the ranges of 96.1%-108.1% and 91.4%-108.9%,respectively. 3) In the raw tobacco materials,tobacco dust contributed more Pb and Cd to the concentrated liquid than tobacco stem did. The Pb in paper base was mainly from raw materials and fillers,while the Cd in paper base was mainly from raw materials. The addition of modulation liquid reduced the Pb and Cd contents in the formulation liquid,however the reuse of coating liquid increased the Pb content in the coating liquid. Furthermore,during the process of extraction,Pb and Cd entered were more from the liquid materials than those from the solid materials.关键词
造纸法再造烟叶/石墨炉原子吸收/铅/镉Key words
Paper-making process reconstituted tobacco/Graphite furnace atomic absorption spectrometry/Lead/Cadmium分类
轻工纺织引用本文复制引用
赵东辉,李新生,卢岚..造纸法再造烟叶工艺过程中铅、镉含量的测定[J].烟草科技,2016,49(7):70-76,7.基金项目
上海烟草集团太仓海烟烟草薄片有限公司科技项目“辅料重金属检测方法研究”（HYBP2015-01）。 （）
