Table 4. Comparative Results of Identifying a Group of Compounds with RIs of 1514–1590 According to the Mass Spectrum–Distribution Ratio and Mass Spectrum–RI Criteria (Trimethylnaphthalene Distribution Ratio 1.21 and Methylethylnaphthalene 1.5, EST RI 1571).

linear RI	Kp′	identification by mass spectrum and partition coefficient	the result of automatic identification by mass spectrum (>70%) and RI (±30)
1514	1.20	trimethylnaphthalene	not identified
1521	1.20	trimethylnaphthalene	5,9-methano-5H-benzocycloheptene, 8-bromo-8,9-dihydro-
1528	1.54	methylethylnaphthalene	5,9-methano-5H-benzocycloheptene, 8-bromo-8,9-dihydro-
1535	1.21	trimethylnaphthalene	5,9-methano-5H-benzocycloheptene, 8-bromo-8,9-dihydro-
1544	1.24	trimethylnaphthalene	naphthalene, 2,3,6-trimethyl-
1550	1.19	trimethylnaphthalene	naphthalene, 2,3,6-trimethyl-
1567	1.21	trimethylnaphthalene	naphthalene, 2,3,6-trimethyl-
1571	1.24	trimethylnaphthalene	naphthalene, 2,3,6-trimethyl-
1585	1.23	trimethylnaphthalene	naphthalene, 2,3,6-trimethyl-
1590	1.51	methylethylnaphthalene	naphthalene, 2,3,6-trimethyl-