Comparative Study of Solid Phase Adsorption Sampling Tubes for the Analysis of Acrolein in Ambient Air

Two kinds of sampling tubes have been developed for the analysis of acrolein in ambient air, which were filled with 200mg silica gel sorbent coated with either pentafluorophenyl hydrazin (PFPH) or 2,4-dinitrophenyl hydrazine(DNPH). GC/EDC and HPLC/UV are employed to evaluate the performance of PFPH-coated and DNPH-coated tubes, respectively. The PFPH or DNPH coating amount of each tube, the sampling flow rate and the storage time were optimized to conduct a comparative study about the extraction efficiency(96% for PFPH, 92% for DNPH), collection efficiency(98% for PFPH, 99% for DNPH), storage capacity(5d for PFPH, less than 5h for DNPH) of both.