优化了空气中的醛、酮类化合物的测定方法.采用酸性饱和2,4-二硝基苯肼吸收液采集空气样品,发生衍生化反应后,生成2,4-二硝基苯腙类化合物,经溶剂萃取后,高效液相色谱分离检测.加标回收率在63.7%～119.0%之间,可用于空气中16种醛、酮类化合物的检测.

建立了固定污染源排放废气中的醛、酮类化合物的测定方法.用酸性2,4-二硝基苯肼(DNPH)吸收液采集废气样品,并发生衍生化反应,生成2,4-二硝基苯腙类化合物,用溶剂萃取后,经高效液相色谱分离检测.加标回收率在64.6％～109％之间,当采样体积20?L时,方法的检出限为0.005～0.010?mg/m3.可用于固定污染源废气中12种醛、酮类污染物的检测.

基于2019年沈阳市4个不同功能区挥发性有机物(VOCs)小时分辨率的在线监测数据,分析了环境空气中VOCs的污染特征及来源.结果表明,观测期间沈阳市环境空气中VOCs日平均体积分数为(31.5±13.3)×10-9,4个功能区VOCs体积分数均呈现出冬季明显大于夏季的特征;工业区环境空气中VOCs体积分数明显高于其他功能区.商业交通居民混合区、文化居民混合区、郊区VOCs体积分数呈现明显双峰结构,工业区双峰结构不明显.工业区VOCs以新鲜排放为主,而其他3个区域为老化气团的传输.工业区春、夏季环境空气中VOCs来源包括燃料挥发源(26.90％)、溶剂与涂料源(17.69％)、燃烧源(16.40％)、化工源(15.69％)、交通源(7.57％)和炼油炼焦源(4.15％).秋、冬季VOCs的来源包括燃烧源(30.77％)、溶剂与涂料源(20.26％)、燃料挥发源(18.79％)、化工源(11.54％)、炼油炼焦源(9.34％)和交通源(5.51％).

通过实验确定用2,4-二硝基苯肼吸附管的涂渍方法测定醛酮类化合物;比较了C18柱、佛罗里硅藻土柱及硅胶柱对DNPH的涂渍效率和乙腈对醛酮腙的洗脱效率。结果表明：硅胶柱对DNPH涂渍效率及对醛酮腙的洗脱效率高,是制备2,4-二硝基苯肼吸附柱的最佳填充柱。

This article introduce a method on which PAHs samples(including gas and particles) in ambient air are collected by self-made equipments,silica gel cleanup of solvent extracts and determination by HPLC.Moreover,existing condition of PAHs in ambient air is also studied.

通过对土壤中挥发性有机物样品进行超声提取时间、加标回收率和精密度试验,建立了一种测定土壤中各种挥发性有机污染物的分析方法.结果表明,该方法简单、快速、准确,平均回收率为92.0%～119.5%(n =7).

This document based on the analysis way of uncertainty provided by “Guide to Uncertainty Evaluation in Chemistry Analysis”analyzed each factor that influenced metrical results’uncertainty and evaluated the uncertainty when Benzo(a)pyrene was determinated by using High Performance Liquid Chromatography,and the uncertainty was evaluated and described.

Ultrasonic extraction and gas chromatography-mass spectrumetry(GC/MS)have been used to analyze volatile organics in soil.Ultrasonic extraction durations were selected.Recovery and precision were detemined.A method for the determination of volatile organic materials in soil has been established.The results showed that the method is simple,rapid,and accurate.The recovery were determined to be from92.0%to119.5%(n=7).