Time variation of trace elements in airborne particles in San Jose, Costa Rica

被引：0

作者：

Salazar, A ^{[1
]}

Nelson, JW

Thonnard, P

机构：

[1] Univ Costa Rica, Lab Fis Nucl Applicada, San Jose, Costa Rica

[2] Florida State Univ, Dept Phys, PIXE Lab, Tallahassee, FL 32306 USA

来源：

JOURNAL OF TRACE AND MICROPROBE TECHNIQUES | 2000年 / 18卷 / 02期

关键词：

aerosol; PIXE; multielemental analysis; Van de Graaff accelerator; pollution;

D O I：

暂无

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We have measured trace elements in airborne particles to identify possible pollution sources at San Jest, Costa Rica. Time sequence streaker aerosol samplers were operated over a week period for each site chosen. The aerosol was collected in one size fraction on a Nucleopore membrane. PIXE was used to analyze the concentration of 14 elements detected. Samples were irradiated with 3.2 MeV protons using the 4 MV Van de Graaff accelerator of Florida State University. Ambient aerosols contain fine sulfur, marine and several distinctive soil components. About 85% of the particles are formed by soil dust and automobile combustion, with some elements from the marine breeze. The average values for all elements (except Si) are less than 1 mu g/m(3)

引用

页码：287 / 292

页数：6

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