搜索结果: 1-4 共查到“知识库 环境科学技术 GC/MS”相关记录4条 . 查询时间(0.055 秒)
利用涂布五氟苄基羟胺(PFBHA)的Tenax-TA作为固体吸附剂,采取主动采样的方式采集大气中羰基化合物,再经溶剂洗脱和氮吹浓缩后用气相色谱/质谱(GC/MS)分析,成功检测到14种单羰基化合物和2种二羰基化合物(乙二醛与甲基乙二醛).研究表明:在吸附剂的装载量为50 mg的前提下,当衍生剂的涂布量为260 nmol,采集流速为50 mL·min-1时,采集效果最佳.羰基化合物的检测限、平行样的...
High-Precision GC-MS Analysis of Atmospheric Polycyclic Aromatic Hydrocarbons (PAHs) and Isomer Ratios from Biomass Burning Emissions
Agricultural-Waste Burning PAHs Accelerated Solvent Extraction GC-MS
2013/3/12
This manuscript describes an analytical method for the quantitative determination of 16-polycyclic aromatic hydrocarbons (PAHs) using accelerated solvent extraction (ASE), followed by purification on ...
Extraction and Identification of Water-Soluble Compounds in Palm-Pressed Fiber by SC-CO2 and GC-MS
Palm-pressed fiber phenolic water-soluble compound supercritical carbon dioxide
2009/2/10
The residual oil recovered from palm-pressed fiber is known to contain high level of carotenes (4,000 mg kgˉ1 to 6,000 mg kgˉ1) and vitamin E such as tocopherols and tocotrienols (2,000 mg kgˉ1 to 3,0...