Lawrence A J, Masih A, Taneja A
Department of Chemistry, School of Chemical Sciences, St John's College, Agra, India.
Indoor Air. 2005 Apr;15(2):76-82. doi: 10.1111/j.1600-0668.2004.00311.x.
Indoor air quality (IAQ) has been a matter of public concern these days whereas air pollution is normally monitored outdoors as part of obligations under the National air quality strategies. Much little is known about levels of air pollution indoors. Simultaneous measurements of indoor and outdoor carbon monoxide (CO) and oxides of nitrogen (NO and NO2) concentrations were conducted at three different environments, i.e. rural, urban and roadside in Agra, India, using YES - 205 multigas monitor during the winter season, i.e. October 2002-February 2003. A statistical correlation analysis of indoor concentration levels with outdoor concentrations was carried out. CO was maximum at roadside locations with indoor concentrations 2072.5 +/- 372 p.p.b. and outdoor concentrations 1220 +/- 281 p.p.b. (R2 = 0.005). Oxides of nitrogen were found maximum at urban site; NO concentration was 385 +/- 211 and 637 +/- 269 p.p.b. for indoors and outdoors respectively (R2 = 0.90792), where as NO2 concentration was 255 +/- 146 p.p.b. for indoors and 460 +/- 225 p.p.b. for outdoors (R2 = 0939464). Although indoor concentration at all the houses of the three sites have a positive correlation with outdoor concentration, CO variation indoors was very less due to outdoor sources. An activity schedule of inside and outside these homes were also prepared to see its influence and concentrations of pollutants. As standards for indoor air were not available for the Indian conditions these were compared with the known standards of other countries, where as outdoor concentrations were compared with the standards given by the Central Pollution Control board, which shows that indoor concentrations of both NO(x) and CO lie below permissible limits but outdoor concentrations of NO(x) cross the standard limits.
''India currently bears the largest number of indoor air pollution (IAP) related health problems in world. An estimated 500,000 women & children die in India each year due to IAP-related cause--this is 25% of estimated IAP-related deaths worldwide. This study will be useful for policy makers, health related officials, academicians and Scientists who have interest in countries of developing world''.
如今，室内空气质量（IAQ）已成为公众关注的问题，而空气污染通常是作为国家空气质量战略规定的义务的一部分在室外进行监测。人们对室内空气污染水平知之甚少。在印度阿格拉的农村、城市和路边这三种不同环境中，于2002年10月至2003年2月冬季期间，使用YES - 205多气体监测仪同时测量了室内和室外一氧化碳（CO）以及氮氧化物（NO和NO2）的浓度。对室内浓度水平与室外浓度进行了统计相关性分析。路边位置的CO浓度最高，室内浓度为2072.5±372 ppmb，室外浓度为1220±281 ppmb（R2 = 0.005）。氮氧化物在城市地点浓度最高；室内NO浓度为385±211 ppmb，室外为637±269 ppmb（R2 = 0.90792），而室内NO2浓度为255±146 ppmb，室外为460±225 ppmb（R2 = 0.939464）。尽管三个地点所有房屋的室内浓度与室外浓度都呈正相关，但由于室外源，室内CO的变化非常小。还编制了这些房屋内外的活动时间表，以查看其对污染物浓度的影响。由于印度没有室内空气质量标准，因此将其与其他国家已知的标准进行了比较，而室外浓度则与中央污染控制委员会给出的标准进行了比较，结果表明室内NO(x)和CO的浓度均低于允许限值，但室外NO(x)的浓度超过了标准限值。
“印度目前是世界上与室内空气污染（IAP）相关的健康问题数量最多的国家。据估计，印度每年有50万妇女和儿童死于与IAP相关的原因——这占全球估计的与IAP相关死亡人数的25%。这项研究将对发展中国家感兴趣的政策制定者、卫生相关官员、学者和科学家有用”。
