Dynamic Calibrations of Saltzman Type Analyzers Using NO₂ in Air Mixtures

Abstract

This paper describes how dynamic dilution systems can be used I prepare ambient levels of NO₂ in air for calibration of Saltzms type continuous analyzers. Permeation tubes may in the future b more applicable, but for the present these are not in general use. A number of field calibrations were made on regular station an; lyzers using a special portable field calibrator which showed th; each instrument has a unique Saltzman factor. These were four to vary all the way from 70 to 90.