用甲醛法测定SO2的影响因素及质量保证措施

探讨了甲醛法测定ＳＯ_２浓度时ＰＲＡ浓度和实验温度对ＳＯ_２曲线斜率的影响。根据实验结果，提出测定ＳＯ_２方法１的实验室质量保证措施，得出不同显色温度的显色时间；ＲＳＤ小于４％，系统误差小、精密度好、准确度高。     

甲醛法测定SO_2灵敏度初探

甲醛法测定ＳＯ２灵敏度初探周秀华（浙江省平湖市环境监测站，平湖３１４２００）试验表明，ＮａＯＨ摩尔浓度对方法灵敏度有较大影响，其适宜浓度应为２．５０ｍｏｌ／Ｌ，此时灵敏度可提高（１４％），而且相对标准偏差为３％（ｎ＝５），表明方法的精密度和准确度也相...     

城市环境空气监测点位新老分析方法相关性验证

以赤市２种采样方法获得的数据为基础，运用数据统计中的双因素方差法及一元线性回归法对２种采样方法的相关性进行了验证。结果表明，连续采样法代替五日手工采样法后，对于ＳＯ２、ＮＯｘ２种方法之间无显著差异，对于ＴＳＰ两方法的延续性很差。     

WK－1A型二氧化硫自动测定仪测定烟气中SO_2的方法研究

本文研究了仪器电导法测定烟气中ＳＯ２的监测方法，并与碘量法进行了比较，提出了吸收液测定的影响及吸收液的配制方法。本方法简单快速，能够满足烟气中ＳＯ２监测工作的要求。     

我国SO2总量控制监测技术的进展

我国在实施ＳＯ２排放总量控制的同时,ＳＯ２排放总量监测技术也得到了发展,体现在手工采样监测方法,特别是碘量法得到了进一步完善,拥有了我国自己设计生产的基于多种测定原理的便携式ＳＯ２自动测定仪,基本适应了当前ＳＯ２总量控制监测的需要。     

兰州市SO2分担率分布与大气环境总量控制的探讨

利用历年兰州市环境质量报告书和有关该市大气环境研究课题、厂矿评价资料和结论，对兰州市区各网格点内ＳＯ２年排放量和采暖期排放量分担率分别进行了绘图分析。依据分担率分布特征和盛行风向，定性验证了兰州市区各采样点ＳＯ２监测值的分布特征。     

用扩散法被动式个体采样器同时测定空气中二氧化硫和二氧化氮

本文介绍了用被动式个体采样器同时测定空气中ＳＯ２和ＮＯ２的方法,吸收层用三乙醇胺（２０％）＋碳酸钠（５％）溶液浸渍的滤纸,采样后分成两等分,分别测定ＳＯ２和ＮＯ２浓度。与有动力的溶液吸收管现场对比验证,表明两者结果是一致的。在外环境监测时,为了克服风速的影响,可将被动式个体采样器放在ＴＳＰ流量采样器的帽形采样头中,这样可同时测定环境空气中ＴＳＰ、ＳＯ２和ＮＯ２。     

大气二氧化硫两种分析方法对测定结果的影响

对甲醛缓冲溶液吸收－盐酸副玫瑰胺测定大气中ＳＯ２的两种分析方法进行了对比实验表明，由于实验条件和试剂浓度不同，造成测定结果有一定差异，（空气和废气监测分析方法）法略高于（环境监测技术规范）法。     

NO→NO_2氧化管氧化效率的研究─改进的Saltzman法

ＮＯ→ＮＯ＿２氧化管氧化效率的研究─改进的Ｓａｌｔｚｍａｎ法王玉平，陈涛，杜萍萍，王娟（辽宁沈阳市环境监测站，１１００１５）空气中含氮的氧化物很多，其中主要成分是一氧化氮和一氧化氮。用Ｓａｌｔｚｍａｎ法测定空气中的氮氧化物（ＮＯ。＋ＮＯ，以ＮＯ。计）...     

大气采样器气路故障的快速检查方法

大气采样器气路故障的快速检查方法丁美兰（山东省东营市环保研究所２５７０９１）大气中ＳＯ２与ＮＯｘ的采样过程中气路经常出现阻塞或漏气的故障，必须迅速排除，才能保质保量的完成预定的采样任务。１采样气路采样系统依次由吸收瓶，干燥筒、微孔滤膜，转子流量计、临...     

Development of a personal monitoring method for nitrogen dioxide and sulfur dioxide with Sep-Pak C18 cartridge sampling and ion chromatographic determination

Personal monitoring methods for the determination of hourly integrated concentrations of NO2 and SO2 in ambient air have been developed. Triethanolamine (TEA)-impregnated C18 Sep-Pak cartridges were used to collect NO2 and SO2 simultaneously. After sampling, NO2 and SO2 as their nitrite, nitrate, sulfite and sulfate analogues were stripped from the cartridges with a solution of 5% methanol in distilled, deionized water (DDW) and then determined by ion chromatography. Laboratory tests were conducted to evaluate the sampling rate, collection and recovery efficiencies, breakthrough volumes, absorption capacity, interference and sample stability on the cartridge during storage. NO2 and SO2 detection limits of 0.3 and 0.4 ppb respectively for 1 h samples were obtained. Recoveries for both NO2 and SO2 exceeded 85%.     

大气优化布点监测方法简化试验

将每天TSP、SO_2两种污染物各采四次样并分别进行测定,简化为每天各采一个“日混合样”进行测定,对测定结果进行数理统计检验结果表明:测定值之间不存在显著性差异、两种方法的测值波动是由偶然因素造成的,因此,简化方法即采日混合样进行分析是一种可靠的监测方法,它适用于煤质中含硫份较低的地区。     

烟气中SO_2监测质量控制的研究

本文针对烟气中ＳＯ２手工采样监测的质量控制,如采样管的温度、采样流量、样品保存等进行了研究,并对原监测方法提出改进措施,提高了方法的准确度和精密度,从而保证了监测数据的准确性和可靠性。     

采样高度和降雪对大气污染物监测结果的影响

大气中SO_2、NO_x、TSP和CO平行采样监测结果的统计分析表明,地面与楼顶采样的差异不显著,其浓度变化有随高度呈规律性的变化趋向,降雪具有明显的洗脱清除作用。     

平行双样对大气二氧化硫采样样品进行质量控制的应用研究

通过对大气二氧化硫采样平行双样相对偏差变化规律的分析，证明了用平行双样控制大气二氧化硫采样样品的质量是可行的，并确定了平行双样相对偏差的控制指标，为大气二氧化硫采样的质量控制提供了可靠的依据     

Characterization and optimization of an online system for the simultaneous measurement of atmospheric water-soluble constituents in the gas and particle phases

In this work we present the results of extensive characterization and optimization of the Ambient Ion Monitor-Ion Chromatograph (AIM-IC) system, an instrument developed by URG Corp. and Dionex Inc. for simultaneous hourly measurements of the water-soluble chemical composition of atmospheric fine particulate matter (PM(2.5)) and associated precursor gases. The sampling assembly of the AIM-IC consists of an inertial particle size-selection assembly, a parallel-plate wet denuder (PPWD) for the collection of soluble gases, and a particle supersaturation chamber (PSSC) for collection of particles, in series. The analytical assembly of the AIM-IC consists of anion and cation IC units. The system detection limits were determined to be 41 ppt, 5 ppt, and 65 ppt for gas phase NH(3(g)), SO(2(g)), and HNO(3(g)) and 29 ng m(-3), 3 ng m(-3), and 45 ng m(-3) for particle phase NH(4)(+), SO(4)(2-), and NO(3)(-) respectively. From external trace gas calibrations with permeation sources, we determined that the AIM-IC is biased low for NH(3(g)) (11%), SO(2(g)) (19%), and HNO(3(g)) (12%). The collection efficiency of SO(2(g)) was found to strongly depend on the composition of the denuder solution and was found to be the most quantitative with 5 mM H(2)O(2) solution for mixing ratios as high as 107 ppb. Using a cellulose membrane in the PPWD, the system responded to changes in SO(2(g)) and HNO(3(g)) within an hour, however for NH(3(g)), the timescale can be closer to 20 h. With a nylon membrane, the instrument response time for NH(3(g)) was significantly improved, becoming comparable to the responses for SO(2(g)) and HNO(3(g)). Performance of the AIM-IC for collection and analysis of PM(2.5) was evaluated by generating known number concentrations of ammonium sulfate and ammonium nitrate particles (with an aerodynamic diameter of 300 nm) under laboratory conditions and by comparing AIM-IC measurements to measurements from a collocated Aerosol Mass Spectrometer (AMS) during a field-sampling campaign. On average, the AIM-IC and AMS measurements agreed well and captured rapid ambient concentration changes at the same time. In this work we also present a novel inlet configuration and plumbing for the AIM-IC which minimizes sampling inlet losses, reduces peak smearing due to sample carryover, and allows for tower-height sampling from the base of a research tower.     

二氧化硫的变化规律及监测频率代表性的验证

对１９９２年连续十二个月的二氧化硫监测数据的分析，掌握了二氧化硫随时间的变化规律。对间断采样频率的代表性作出结论。     

绵阳大气中二氧化硫浓度升高的原因探讨

针对1990年和1991年绵阳市SO_2浓度升高,尤其是1990年和1991年元月监测的SO_2浓度值更高。经研究发现监测采样时的气象条件对污染物测定值产生重要影响。     

Peak exposures in aluminium potrooms: instrument development and field calibration

Aluminium smelter potrooms are unique in that workplace exposures to hydrogen fluoride (HF), sulfur dioxide (SO2), and particulate matter occur simultaneously for some tasks. The peak exposures to these contaminants are of increasing interest in discovering the etiology of respiratory health effects. While a variety of direct-reading instruments are available for sulfur dioxide and particulate matter, only a few exist for hydrogen fluoride. The sensors in these HF instruments have a cross-sensitivity to sulfur dioxide making it difficult to monitor HF in an environment that also contains SO2. To overcome this problem, we assessed the simultaneous use of two electrochemical instruments: one with a SO2 sensor that does not respond to HF and the second with a hydrogen fluoride sensor that responds to both HF and SO2 in a 1 : 1 ratio, termed 'total acid gas'. The difference in the response between the two instruments should indicate the HF concentration: [HF + SO2] minus SO2 equals HF. The performance characteristics of this sampling train were evaluated in the laboratory through the generation of both HF and SO2 with permeation tubes. The response and recovery times for the SO2 only instrument were acceptable (6 and 15 s, respectively), but the "total acid gas" instrument exhibited both slow response and slow recovery approaching three and six min. The association between the traditional integrated filter sampling method and the direct-reading instrument for SO2 is 0.80 (Spearman's rho). The use of the digital filter strengthens the association between the HF direct-reading instrument and the integrated samples from 0.41 to 0.68.     

湿法脱硫后高湿烟气中SO3酸雾监测方法研究

利用三氧化硫(SO3)发生装置以及模拟烟气湿法脱硫系统,研究了烟气再热温度、恒温水浴温度、采样速率、冷凝管类型规格及吸收瓶个数等不同采样参数对SO3酸雾采集率的影响。结果表明,当烟气再热温度低于烟气酸露点时会导致SO3酸雾收集率下降,采用控制冷凝法采样时应使用大流量(10L/min)采样,冷凝管应选择外套长度为400 mm的蛇形螺旋冷凝管,并将冷凝管置于温度为65℃左右的恒温水浴中;用碱液吸收法采样时应串联3个吸收瓶后,使用小流量(1L/min)采样。烟气温湿度、二氧化硫(SO2)浓度以及烟气中共存组分等对碱性吸收法的采集影响较大,而对控制冷凝法几乎没有影响。因此确立了针对湿法脱硫后高湿烟气环境下SO3酸雾的监测方法为控制冷凝法更为适宜。