1. 500 CR 4 5 GC MASS MASS MASS 2 5 2. Mary A Becker GC MASS J 1 p 1 6 2002 2 morita kozmt eng fukui u aC jD 3. 2 GC MASS GCMS QP5000 SHIMADZU 1 He 1 2 MASS PY 2020D UATDM 2 5SN 2 4. MASS 3 MASS 3 1 MASS _ 1 3 5. 2 1 GC MSS COOCHzCHs 50 150C 30 min 100 MW 285 18 Br 3 1 3 284 286 1 CisHzOsBrl 1 Br 79Br 91Br 1 1 2 ii iene 4 MASS MASS GC MASS 6. GC MASS 2 1 MASS GC MASS