建立了罐采样-冷柱温-气相色谱质谱法测定环境空气中13种醛酮类化合物的方法,采用全扫描模式(SCAN)和选择性离子模式(SIM)同时进行测定,内标法定量。结果表明:当取样量为400 m L时,13种醛酮类化合物在0.005~75.2 nmol·mol^(-1)的...建立了罐采样-冷柱温-气相色谱质谱法测定环境空气中13种醛酮类化合物的方法,采用全扫描模式(SCAN)和选择性离子模式(SIM)同时进行测定,内标法定量。结果表明:当取样量为400 m L时,13种醛酮类化合物在0.005~75.2 nmol·mol^(-1)的浓度范围内具有良好的线性关系,平均相对响应因子的RSD均小于15.0%,方法检出限为0.005~0.10 nmol·mol^(-1);在0.5、5.0、20.0 nmol·mol^(-1)三个加标浓度下,加标回收率在78.8~106%之间。此外,采用液相色谱法和气相色谱质谱法测定济南的三个不同功能区(背景区、城市、郊区)的样品,两种测定方法比较的结果说明13种醛酮类化合物具有较好的一致性,从而证明了气相色谱质谱法测定13种醛酮类化合物的可行性。本方法无需添加任何有毒有害化学试剂,操作简单,灵敏度高,稳定性好,效率高。不仅很好地解决了丙烯醛和丙酮的基线分离问题,而且还能准确地定量测定空气中13种醛酮类化合物。展开更多
Monoterpenoids are widely existing in indoor air.A GC-MS method was established for determination of monoterpenoids in the indoor air by using silonite coated canisters(SUMMA canisters),and preconcentrating low level ...Monoterpenoids are widely existing in indoor air.A GC-MS method was established for determination of monoterpenoids in the indoor air by using silonite coated canisters(SUMMA canisters),and preconcentrating low level samples utilizing three stages focuser.The method was suitable for the determination of trace VOCs in indoors air.The detection limits of method for α-pinene and β-pinene were both 0.71 μg/m3.展开更多
文摘Monoterpenoids are widely existing in indoor air.A GC-MS method was established for determination of monoterpenoids in the indoor air by using silonite coated canisters(SUMMA canisters),and preconcentrating low level samples utilizing three stages focuser.The method was suitable for the determination of trace VOCs in indoors air.The detection limits of method for α-pinene and β-pinene were both 0.71 μg/m3.
