摘要
[目的]研究卷烟主流烟气中氰化物含量的测定方法,同时对烟气补集装置进行改进。[方法]以0.2mol/LNaOH为吸收液,采用改进的烟气捕集装置捕集卷烟主流烟气中氰化物,然后在酸性介质中蒸馏分离,将捕集液中氰化物以HCN形态蒸出,再用1%(m/V)NaOH溶液吸收馏出液。馏出液中氰化物含量采用间接分光光度法测定。[结果]CN^-质量浓度在0-0.8mg/L范围内符合比耳定律,检出限为0.02mg/L,工作曲线相关系数0.999。用于实际样品分析,方法相对标准偏差为0.6%-1.7%,加标回收率为84.46%-108%。[结论]分光光度法满足卷烟主流烟气中HCN的研究,改进后的装置吸收效果令人满意。
[Objective] The research aimed to study the determination method of cyanide in mainstream smoke and improvement of mainstream stroke absorption device, [ Method] Cyanides in mainstream smoke were trapped by the adoption of improved gas trap with 0.2 mol/L NaOH as absorption solution. HCN was steamed out from the cyanide in the trapping solution after distillation separation in acid medium and then absorbed by 1% (m/V) of NaOH solution. Cyanides in the distillate were determined by indirect spectrophotometry. [ Result] Beer's law held in the quality concentration range of 0 - 0.8 mg/L of ion CN^- with 0.02 mg/L of the detection limit and the correlation coefficient 0.999 of calibration crave. The relative standard deviation of the actual samples determination results were 0.6% - 1.7% and the recoveries of standard addition were 84.46% to 108%. [ Conclusion] The spectrophotometry could be used to determine the content of cyanide in mainstream smoke. And the effect of the improved device was satisfactory.
出处
《安徽农业科学》
CAS
北大核心
2008年第18期7531-7532,7567,共3页
Journal of Anhui Agricultural Sciences
关键词
主流烟气
氰化物
分光光度法
Mainstream smoke
Cyanide
Spectrophotometry