期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 396, 期 2, 页码 839-844出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-009-3221-y
关键词
Organophosphate triesters; SPME; Non-equilibrium; Dynamic air sampling; PICI; GC/MS/MS
Methodology for time-weighted average (TWA) air measurements of semivolatile organophosphate triesters, widely used flame-retardants and plasticizers, and common indoor pollutants is presented. Dynamic non-equilibrium solid-phase microextraction (SPME) for air sampling, in combination with GC/PICI and ion trap tandem MS, yields a fast, almost solvent-free method with low detection limits. Methanol was used as reagent gas for PICI, yielding stable protonated molecules and few fragments. A field sampler, in which a pumped airflow over three polydimethylsiloxane (PDMS) 100-mu m fibers in series was applied, was constructed, evaluated, and used for the measurements. The method LODs were in the range 2-26 ng m(-3) for a sampling period of 2 h. The uptake on the SPME fibers was shown to be about five times faster for triphenyl phosphate compared to the other investigated organophosphate esters, most likely due to more lipophilic properties of the aromatic compound. The boundary layer for triphenyl phosphate when using a 100-A mu m PDMS sorbent was determined to 0.08 mm at a linear air velocity of 34 cm s(-1). Five different organophosphate triesters were detected in air from a laboratory and a lecture hall, at concentrations ranging from 7 ng m(-3) up to 2.8 mu g m(-3).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据