“…Several applications of the Heinrich and Grimes and Larson and Becker molecular sieve methods for determination of n-paraffins in gasoline, kerosine, and light gas oil have been reported. Gurina et al (531) described their application of what is essentially the Heinrich and Grimes method, while Nesmeyanova et al (991) and Rennhak et al (1131) detailed their experience with the Larson and Becker volumetrictechnique. Jaworski (611), on the other hand, allowed n-paraffins to be selectively adsorbed for solution by molecular sieves, then cryoscopically determined amount of unadsorbed isoparaffins.…”