1997 Volume 26 Issue 1 Pages 95-96
An automated gas chromatograph/electron capture detector (GC/ECD) system was developed to monitor the concentration of HCFC-22 in the urban atmosphere at intervals of 90 min. By using two columns in series we avoided the use of cryogen and dryer for preconcentration or sample drying. Oxygen was doped into the N2 carrier gas to sensitize the ECD. Serial measurements of atmospheric HCFC-22 concentration were attempted in the central area of Tokyo.
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