摘要
为了建立检测卷烟纸中铅含量的微波消解-石墨炉原子吸收光谱方法,考察了测试样品的用量、消解剂组成、灰化温度、原子化温度及基体改进剂的影响,确定的优化检测条件为:4mL硝酸+2mL过氧化氢+2mL高纯水作为消解剂,在8mL消解液中加入卷烟纸的质量为0.3000g,灰化温度、原子化温度、基体改进剂分别为700℃,1900℃和0.10g/L磷酸二氢铵。在优选的实验条件下,方法的检出限和相对标准偏差分别为0.471μg/L和1.04%,4种卷烟纸的加标回收率范围在97.8%~105.7%之间。该方法简便、准确、灵敏度高、重复性好、回收率高,适合于卷烟纸中铅的测定。
A method for determining the lead content in cigarette paper with microwave digestion-graphite furnace atomic absorption spectrometry was developed. Some process variables, including quantities of sample, the composition of digestion agent, ashing temperature, atomizing temperature and matrix modifier were optimized as follows: 4 mL of nitric acid at the concentration of 65%, 2 mL of hydrogen peroxide, and 2 mL of high purity water were used as the digestion agent for 0.3000 g of cigarette paper in the presence of microwave irradiation. And the ashing temperature, atomizing temperature and matrix modifier applied were 700, 1900 ~C and 0.10 g/L of ammonium dihydrogen phosphate, respectively. Under the optimum conditions, the detection limit and relative standard deviations were 0.471 μg/L and 1.04%, respectively. The recoveries of 4 kinds of cigarette paper ranged from 97.8% to 105.7%. This method is simple and accurate, features higher sensitivity and recovery and good repeatability, and is suitable for determining the lead content in cigarette paper.
出处
《烟草科技》
EI
CAS
北大核心
2011年第11期36-39,49,共5页
Tobacco Science & Technology
基金
广东中烟工业有限责任公司与华南理工大学合作项目"烟用材料质量安全检测技术研究"(粤烟工05XM QK[2010]016)
关键词
石墨炉原子吸收光谱
卷烟纸
铅
微波消解
Graphite furnace atomic absorption spectrometry
Cigarette paper
Lead
Microwave digestion