浅谈挥发酚类测定中的几个关键问题

在挥发酚的测定过程中，样品的采集、保存、预蒸馏、试剂的质量以及操作过程都会对挥发酚测定值的准确性产生影响，对这些影响因素进行分析，并提出解决办法。     

取代苯胺和苯酚类化合物对大型蚤的毒性及PH值对其毒性的影响

测定了２４个取代苯胺和苯酚类化合物在不同ＰＨ下对大型蚤的２４ｈ半数抑制浓度２４ｈ－ＩＣ５０。结果表明,苯胺类的毒性随ＰＨ的升高而增大,酚类的毒性随ＰＨ的升高而减小。     

油罐挥发气回收系统的模糊控制

介绍应用模糊控制器和变频调速器控制天然气压缩机自动回收油罐原油挥发气系统的控制原理．     

通信作业环境挥发性有机物的定性分析与表征

了解通信机房作业环境挥发性有机物（VOCs)的种类和污染状况，为制定防治措施提供依据，利用气相色谱-质谱计算机联用系统（GC-MS），对地面和地下共10个典型作业环境的VOCs进行了采集和全谱分析，结果表明，共检出332种污染物质，包括苯系物、脂肪烃、多环芳烃、有机醇、酮、胺、脂、羟酸及杂环化合物等，结论是，通信机房VOCs种类繁多、来源复杂，其联合作用可能是影响工作人员工作效率和身心健康的重要源因之一。     

挥发酚测定过程中应注意问题及方法改进

指出用4-氨基安替比林法测量水中挥发酚应该注意的问题,并对测量发法提出了一些改进。     

吹脱-捕集气相色谱法测定底质中易挥发性有机物

研究并建立了利用吹脱－捕集气相色谱法测定底质中易挥发性有机物的分析方法。该方法对底质中２５种易挥发性有机物进行测定。方法回收率在９６％－１０５％,最低检出浓度在０．３－１４．５μｇ／ｋｇ,变异系数在２．７％－５．３％。     

室内空气中挥发性有机物采样方法进展

介绍了近年来室内空气中挥发性有机物的各种采样方法及适用范围，其中重点介绍了美国环保署最新版的TO－17方法和J.Pawliszyn发明的固相微萃取法（SPME），并对一系列的采样方法进行了比较，阐述了这些方法在国内外的应用及研究进展，同时讨论了这些方法的局限性。     

酚类分子结构和纳滤膜特性对截留率的影响规律

选择21种酚类化合物作为模型污染物,分别测定了三种不同纳滤膜对酚类化合物的截留率.结果表明,酚类化合物截留率受到取代基位置、种类和膜特性的影响.对NF270膜和NF膜而言,截留率从大到小的次序为邻位>间位>对位,而NF90膜的截留率为邻位>对位;供电子取代基有增大截留率的趋势,吸电子取代基有减小截留率的趋势;孔径小、荷电量大的纳滤膜截留率更大.通过基于遗传算法的偏最小二乘回归法(GA-PLS),建立了纳滤膜对酚类化合物截留率的定量构效关系模型,通过分析回归方程,可以看出酚类化合物的pKa值对截留率影响最大,影响较大的还有偶极矩等参数.     

The levels, sources and reactivity of volatile organic compounds in a typical urban area of Northeast China

Air concentrations of volatile organic compounds (VOCs) were continually measured at a monitoring site in Shenyang from 20 August to 16 September 2017. The average concentrations of alkanes, alkenes, aromatics and carbonyls were 28.54, 6.30, 5.59 and 9.78 ppbv, respectively. Seven sources were identified by the Positive Matrix Factorization model based on the measurement data of VOCs and CO. Vehicle exhaust contributed the most (36.15%) to the total propene-equivalent concentration of the measured VOCs, followed by combustion emission (16.92%), vegetation emission and secondary formation (14.33%), solvent usage (10.59%), petrochemical industry emission (9.89%), petrol evaporation (6.28%), and liquefied petroleum gas (LPG) usage (5.84%). Vehicle exhaust, solvent usage and combustion emission were found to be the top three VOC sources for O₃ formation potential, accounting for 34.52%, 16.55% and 11.94%, respectively. The diurnal variation of the total VOCs from each source could be well explained by their emission characteristics, e.g., the two peaks of VOC concentrations from LPG usage were in line with the cooking times for breakfast and lunch. Wind rose plots of the VOCs from each source could reveal the possible distribution of the sources around the monitoring site. The O₃ pollution episodes during the measurement period were found to be coincident with the elevation of VOCs, which was mainly due to the air parcel from the southeast direction where petrochemical industry emission was found to be dominant, suggesting that the petrochemical industry emission from the southeast was probably a significant cause of O₃ pollution in Shenyang.     

以过硫酸钾为氧化剂测定水中挥发酚

以过硫酸钾代替铁氰化钾作氧化剂 ,在pH 1 0± 0 2溶液中 ,用 4-氨基安替比林萃取法比色测定低浓度挥发酚 ,于 460nm处有最大吸收峰 ,在 0 μg/2 50mL～ 1 5μg/2 50mL范围内符合比尔定律。 4次校准曲线相关系数为 0 9999～ 0 9994。相对标准偏差为 0 2 % ,回收率为 91 %～ 97%。显色反应的选择性、稳定性、重现性和准确性均较好。氧化剂较稳定 ,易保存、无毒性。