Keywords : filter, ion chromatography, conductivity detection
The working range is 0.01 to 4 mg/m
3 for a 500-L air sample. This method is less sensitive than method 7600 (colorimetric), but it contains fewer sample preparation steps and was found free from interferences when used for sampl es of five chromate-containing paints. This method may be used for the determination of insoluble or soluble Cr(VI).