The present study was carried out for size distribution of aerosols at indoor environments covering six different locations in the Jawaharlal Nehru University campus using TSI AeroTrak Portable Particle Counter (APPC), during the year 2014–15. The instrument provides the particle counts in the ranges from 0.3 μm to 20 μm. After the investigation, total suspended particulate matters (TSPM) were observed in the following order: winter > monsoon > summer. The fine mode particles contributed more than 96% in comparison to coarse modes of particles. In number size distribution, a unimodal trend but with no characteristic seasonal variation was observed, however, a clear seasonal variation of modalities in surface area and volume size distributions was obtained. Both the unimodal and bimodal size distributions in surface area were observed. A slight shift in peak was also observed in the surface area and volume size distributions, which was attributed to be related to different characteristics in the kitchens and canteens of the indoor environment.

本研究是在2014-15年度使用TSI AeroTrak便携式颗粒计数器（APPC）对贾瓦哈拉尔·尼赫鲁大学校园内六个不同地点的室内环境中的气溶胶粒径分布进行的。该仪器提供的颗粒数范围为0.3μm至20μm。调查之后，按照以下顺序观察了总悬浮颗粒物（TSPM）：冬季>季风>夏季。与粗模式颗粒相比，细模式颗粒贡献了96％以上的颗粒。在数量尺寸分布中，观察到单峰趋势但没有特征性的季节性变化，但是，获得了表面积和体积尺寸分布的模态的明显的季节性变化。观察到表面积的单峰和双峰尺寸分布。