SPME-GC/MS法测定垃圾渗沥液中双酚A

建立了固相微萃取-气相色谱质谱联用法测定垃圾渗沥液中双酚A的方法,并用于广州大田山垃圾渗沥液中双酚A含量的测定。对影响萃取的参数进行了优化,实验选用涂层厚度为85μm聚丙烯酸酯(PA)萃取纤维,在搅拌速度为1200r/min、NaCl浓度为20%、pH2.0和室温条件下萃取60min。方法的线性范围为0.1～100μg/L,检出限为0.03μg/L,精密度为6.6%。应用本方法监测了广州大田山垃圾渗沥液中BPA的含量在生物法处理过程中的变化情况。     

GC/MS测定土壤中的酞酸酯

本文针对土壤中酞酸酯类化合物,采用快速压力溶剂萃取仪(ASE)提取,弗罗里柱净化,气相色谱-质谱联用仪(GC/MS)对酞酸酯类有机物进行定性、定量分析。实验过程中采用浓硫酸对实验器皿进行清洗,有效地防止环境中酞酸酯类有机物对样品的污染。结果表明:平均加标回收率在87%～106%之间,相对标准偏差在2.5%～6.5%之间,检出限在0.51μg/kg～1.6μg/kg之间。     

汞矿地区人发中甲基汞的气相色谱测定

本文采用气相色谱法测定人发中甲基汞，对人发的酸度，浸取时间，人发与酸液的比例，以及无机汞存在的影响作了测定和选择，方法的平均回收率９６．６％，精确度２．８％，方法可靠性用氢化物原子荧光法核对，结果一致，并对我国某矿区职工，儿童及产妇发样分析结果作了讨论。     

Headspace-SPME-GC-MS Identification of Volatile Organic Compounds Released from Expanded Polystyrene

A method for the identification of volatile organic compounds (VOCs) released from packaging expanded polystyrene (EPS) is presented. Headspace solid-phase microextraction (HS-SPME) with a 75-m carboxen-polydimethylsiloxan fiber was used as sample preparation technique before the determination of the volatile organic compounds by gas chromatography–mass spectrometry (GC-MS). For separation of compounds, two fused silica capillary columns of different polarity (DB-5ms and BPX-50) were used. Styrene monomer with his impurities and oxidation products, as well as residual pentane, were identified in the headspace of EPS.     

液液萃取-气相色谱/串联质谱法测定水中五氯酚及其钠盐

采用液液萃取处理水样,用气相色谱-串联质谱法测定样品中五氯酚及其钠盐,通过优化测定条件,使方法在1.00μg/L～500μg/L范围内线性良好.检出限和定量限分别为1.00μg/L和5.00μg/L,空白水样五氯酚钠3个质量浓度水平的加标回收率为89.8％～98.4％,5次平行试验测定结果的RSD为5.5％～10.7％...     

填充柱(FID)-顶空气相色谱法测定水和废水中丙烯腈

本文用顶空气相色谱法测定水和废水中丙烯腈,具有简便、快速、灵敏、准确,干扰少,适用性强等优点,适用于不同类型的环境水样分析。     

多氯联苯的气相色谱/质谱/质谱(GC/MS/MS)法测定

采用气相色谱/质谱/质谱(GC/MS/MS)法测定多氯联苯(PCB),具有良好的灵敏度和选择性,在地表水样品检测时,样品只须进行简单的液液萃取-浓缩,不须任何净化过程即可上机分析,方法检出限低于ng/L级。     

Mapping of temperature and line-of-sight errors in constituent retrievals for MIPAS/ENVISAT measurements

An optimized code for the near real-time retrieval of line of sight, temperature and volume-mixing ratio profiles of five key species (O₃, H₂O, HNO₃, CH₄ and N₂O) from infrared limb spectra recorded by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) experiment on board the ENVISAT-1 satellite was developed as part of an ESA-supported study. In this code line of sight and temperature are retrieved simultaneously among themselves, but sequentially with respect to the volume-mixing ratio of the five key species. The sequential retrieval leaves unaccounted the mapping of line of sight and temperature errors in the retrieved volume-mixing ratio of the constituents. This paper illustrates an algorithm that provides the a-posteriori evaluation of temperature and line-of-sight-induced error on the retrieved volume-mixing ratio of the MIPAS key species. It is shown that in most cases temperature and line-of-sight-induced error provides a significant contribution to the total volume-mixing ratio error. The variability of this error as a function of latitude, season and atmospheric model is also analyzed.     

有机硫恶臭物质采样和分析检测技术研究

本研究以二甲二硫醚和甲硫醇为代表对有机硫恶臭物质的采样浓缩,热解析和ＧＣ,ＧＣ／ＭＳ的色谱分离,定性鉴定和定量检测方法进行了实验技术研究。与此同时研制开发了恶臭污染监测的系列配套装置－采样管,微型采样泵,热解析色谱进行装置和标准气体物质发生装置。经筛选确认,国产ＧＤＸＥ１０５采样管可对ＤＭＤＳ和ＣＨ３ＳＨ实现直接常温采样浓缩,样品回收率分别为１００％和６０％。ＧＣ／ＦＰＤ对二种硫化物的检出下限分别     

固相微萃取-毛细管气相色谱法快速同步分析水中有机氯及有机磷农药

固相微萃取是一种快速、简便,集萃取浓缩进样于一体的样品前处理技术,具有分析时间短、灵敏度高、无需有机溶剂的优点.用固相微萃取富集水中8种有机氯及7种有机磷农药,毛细管气相色谱ECD检测器分离分析,整个分析过程只需26min,检出限可达0.002～1μg/L,已用于地表水中有机氯及有机磷农药含量的测定.