DICHOTOMOUS SAMPLERS MODIFIED FOR USE WITH ELECTRON-MICROSCOPY

被引：3

作者：

MAMANE, Y ^{[1
]}

DZUBAY, TG ^{[1
]}

机构：

[1] US EPA,RES TRIANGLE PK,NC 27711

来源：

AEROSOL SCIENCE AND TECHNOLOGY | 1990年 / 13卷 / 02期

关键词：

D O I：

10.1080/02786829008959442

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Large sulfate artifacts up to 2 μm in diameter were observed by scanning electron microscopy for the fine particle fraction collected in dichotomous samplers. The artifacts were attributed to small liquid particles that piled up on the filter, coalesced, and later dried as larger particles. Such artifacts were eliminated when particles were collected in a modified dichotomous sampler in which 80% to 90% of the airflow was diverted from the fine fraction filter. This airflow diversion technique was used successfully with both virtual-impactor and tandem-filter types of dichotomous samplers. © 1990 Elsevier Science Publishing Co., Inc.

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页码：241 / 248

页数：8

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