GJB 533.33A-2021
Part 33 of the method for detecting air components in submarine cabins: Cumene, n-propylbenzene, tert-butylbenzene, n-butylbenzene, sec-butylbenzene, 1,3,5-trimethylbenzene (including other butylbenzene), 1,2, 4-Determination of trimethylbenzene content b (English Version)