Storage Stability of Volatile Organic Compounds from Petrochemical Plant of China in Different Sample Bags

Figure 8

Two gas bag chromatograms of 6 h on the day of sampling. (a) PEA gas bag chromatogram without added shielding gas. (b) PEA gas bag chromatogram with protective gas. (c) PVF airbag chromatogram without protective gas. (d) PVF gas bag chromatogram with protective gas.

(a)

(b)

(c)

(d)