【摘要】 建立室内空气中尼古丁残留量的GC-NPD测定方法,以此作为评价室内空气中烟草烟气(ETS)污染程度的依据。此方法使用被动式采样器进行采样,以1%的硫酸氢钠为吸收液;2 mL二氯甲烷作为萃取溶剂;4 mL 1.5 mol/L的氢氧化钠为洗脱液;超声提取20 min;漩涡混合2 min,GC-NPD测定。方法线性范围0.050~5.0μg/mL,相关系数0.999 6,最低检出浓度0.5μg/m3,相对标准偏差(RSD)为3.1%~4.9%。此方法具有选择性好、灵敏度高、准确度高的特点,可用于室内环境空气中尼古丁的测定。更多还原

【Abstract】 A GC-NPD method was established to determine nicotine residues in indoor air,as the basis for evaluation of tobacco smoke(ETS) pollution degree of indoor air. This method used passive samplers for sampling; glass fiber diaphragm was dipped with 1% of sodium hydrogen sulfate; 2 mL methylene chloride was used as extraction solvent,4 mL 1.5 mol / L sodium hydroxide was used as eluent; ultrasonic extraction time was 20 min,and eddy mixing time was 2 min; at last,the sample was determined by GC-NPD. The results show that,the linear range is 0.050 ~ 5.0 μg/mL,the correlation coefficient is 0.9996,the limit of detectable concentration(S/N=3)is 5.0 μg/m3,the relative standard deviation(RSD) of actual samples analysis is 3.1 %~ 4.9 %. The method has high selectivity,high sensitivity and accuracy. It can be applied to determine nicotine content in indoor air.更多还原