地表水中氨基甲酸酯农药及代谢物的快速、灵敏分析方法研究

利用固相萃取-超高效液相色谱/串联质谱,建立水样中痕量氨基甲酸酯农药及代谢物的分析方法.该方法在5min之内完成15种目标物的分析;加标回收率为80.4%～120.7%,相对标准偏差为0.7%～12.0%;检测限为0.005～0.2ng/L;在0.002～0.2μg/ml浓度范围内具有很好的线性.该方法具有快速、灵敏的特点.     

C_(18)-固相萃取/气相色谱法检测水中氯酚类

采用C18柱对水环境样品进行固相萃(SPE),用GC-ECD测定的方法检测水中的氯酚类物质,方法的检出限可低至ng/L数量级,三种氯酚的回收率约为80%,方法操作简便,试剂消耗少,灵敏度高,重现性良好,适于水环境中氯酚类的监测.     

便携式气相色谱法测定室内空气中的苯系物

介绍了FFKM301便携式气相色谱仪在室内空气苯系物现场监测中的应用,通过对便携式气相色谱仪柱温、压力、泵抽时间和反吹时间等条件的讨论,确定了最佳的方法设置:柱温60℃、压力12psi、泵抽时间20s、反吹时间300s,该方法的检出限为10ppb(苯),精密度小于6%,与经典的气相色谱法进行对比试验,相对偏差不超过20%,能够满足室内空气苯系物的监测要求。     

环境样品阿特拉津及降解产物分析方法进展

阿特拉津是一种世界范围广泛使用的除草剂。文章介绍了环境样品中阿特拉津及其降解产物分析的前处理技术和分析方法的研究进展,并为今后的研究方向提出了建议。     

GC-MS测定土壤中酞酸酯类化合物

采用毛细管柱气相色谱-质谱联用选择离子检测(GC-MS-SIM)技术,结合快速萃取和佛罗里硅土柱净化方法分析土壤中的六种酞酸酯类(PAEs)化合物。结果表明,六种PAEs峰形好,平均加标回收率为76.7%~110%,相对标准偏差为2.5%~4.5%。方法具有操作简便、回收率高、纯化效果好和对环境友好的特点,且具有很强的实用性。     

气相色谱法测定蔬菜中菊酯类农药残留

用等量体积混合的丙酮和石油醚作提出剂,弹性石英毛细管柱分离,电子捕获检测器,气相色谱法测定蔬菜中3种菊酯类农药残留。方法检出限（3S/N）为0.010mg/L~0.023 mg/L,相对标准偏差均〈7%,样品加标回收率在78%~91%范围内。方法简便快速,可满足蔬菜安全卫生的监督检测。     

固相微萃取-毛细管气相色谱法测定水中的吡啶

用固相微萃取富集水中吡啶,毛细管气相色谱分离分析。通过试验确定了固相微萃取的分析参数。方法的检出限可达0.001mg/L,标准曲线相关系数0.9990,相对标准偏差（RSD）在0.9%~3.1%（n=5）,平均加标回收率在92.4%~104%,已用于饮用水及地表水水中吡啶的测定。     

淄博化工园区大气有机污染应急监测与管理对策

针对工业聚集区内多种恶臭混杂的情况,以淄博化工园区为例,研究了大气有机污染突发事件中有机物的应急监测方法,并提出了治理对策。利用便携式气相色谱-质谱联用仪,对重点企业事先监测,掌握各企业特征污染物,作为应急监测查找污染源头的依据;现场分析受污染空气中的化合物组成及浓度,通过查询、比对各企业特征污染物,确认责任排污企业。提出了末端监测处罚治理与对重点污染企业推行清洁生产相结合,应急监测与有机污染物在线监测相结合,建立企业污染源特征组分数据库,加强企业无组织排放监测与监管等治理大气有机污染的建议。     

直接进样-超高效液相色谱——三重四级杆串联质谱法测定地表水中丙烯酰胺

采用直接进样一超高效液相色谱-三重四级杆串联质谱法,建立了对地表水中丙烯酰胺的分析方法。该方法不需要衍生化等前处理步骤。结果表明,丙烯酰胺含量在0．100～10．0μg／L范围内具有很好的线性相关性,实际水样加标回收率为80．0％-105％。该方法的检出限和测定下限分别为0．025μg／L和0．100μg／L,能够满足地表水环境质量标准中关于饮用水中丙烯酰胺最高安全浓度指南的要求,提高了引用水源丙烯酰胺的检测要求。     

On-line CO, CO2 emissions evaluation and (benzene, toluene, xylene) determination from experimental burn of tropical biomass

Atmospheric pollution and global warming issues are increasingly becoming major environmental concerns. Fire is one of the significant sources of pollutant gases released into the atmosphere; and tropical biomass fires, which are of particular interest in this study, contribute greatly to the global budget of CO and CO₂. This pioneer research simulates the natural biomass burning strategy in Malaysia using an experimental burning facility. The investigation was conducted on the emissions (CO₂, CO, and Benzene, Toluene, Ethylbenzene, Xylenes (BTEX)) from ten tropical biomass species. The selected species represent the major tropical forests that are frequently subjected to dry forest fire incidents. An experimental burning facility equipped with an on-line gas analyzer was employed to determine the burning emissions. The major emission factors were found to vary among the species, and the specific results were as follows. The moisture content of a particular biomass greatly influenced its emission pattern. The smoke analysis results revealed the existence of BTEX, which were sampled from a combustion chamber by enrichment traps aided with a universal gas sampler. The BTEX were determined by organic solvent extraction followed by GC/MS quantification, the results of which suggested that the biomass burning emission factor contributed significant amounts of benzene, toluene, and m,p-xylene. The modified combustion efficiency (MCE) changed in response to changes in the sample moisture content. Therefore, this study concluded that the emission of some pollutants mainly depends on the burning phase and sample moisture content of the biomass.