Atmosphere generation system for the preparation of ambient air volatile organic compound standard mixtures

被引：21

作者：

Ballesta, PP ^{[1
]}

Baldan, A ^{[1
]}

Cancelinha, J ^{[1
]}

机构：

[1] Commiss European Communities, Joint Res Ctr, Inst Environm, Ispra Estab, I-21020 Ispra, VA, Italy

来源：

ANALYTICAL CHEMISTRY | 1999年 / 71卷 / 11期

关键词：

D O I：

10.1021/ac981291l

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A dynamic generation system based on permeation for the preparation of volatile organic compounds at ambient air concentration levels is described herein. The performance of the equipment, sources of uncertainties, and overall uncertainty value are also evaluated. The system is capable of generating multicomponent mixtures at ppb levels and simulating different atmospheric conditions by changing the humidity, concentration level, temperature, and wind velocity. A minimized value for the overall uncertainty in the concentration generated by the system was determined to be +/-1.9% for higher weighing time intervals of 4 weeks.

引用

页码：2241 / 2245

页数：5