Determination of fumigants. x. Methods of analysis of heavy naphtha and other neutral light oils

✍ Scribed by Sarsfield, N. F.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1942
• Weight: 777 KB
• Volume: 61
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000610102

✦ Synopsis

The components nre tlieii given n score derived from their tosic indices, proportionnte to their nniounts in the mixtiire. Thus, n snniple of Iienvy nnphthii containing 10% of syleiie, 40% of nroinntic hydrocnrbons, 48% of n pnrnffiil-unsnturnted niixt.urc (1 : I), nnd 2% of phenol gives tho scores : 20 + 38 + 19 + 30, giving n tosic index of 137.

Fof reasons of spnce only II representntire nun~her of results is giwn in the following tnble.

% Courpoaition

This tnlile shows t h n t it is ndrisnhle to keep tho contents of ,pnrnffiiis nntl unsnturiitect conipountls npprosimntcly cqunl nntl to keep the nronintic content ns low ns possible. In fnct, the most tosic misturc would contniii pnrnffins nntl unsntiir~ted substnnccs, niixetl with the requisite qunntities of phenols ant1 syleiie (mixture no. 4).

In view of t.lie difficulty of, obtnining unsaturntetl substances, this would iiot be nn econoniic proposition.

The n ~u e ~~d e d specificntion of "Disinfestntion nnphtlin" gunrnniees a sufficient content, of uiisiitiirntcd substances, but it is possible thnt 11 snniple otherwise fitting t.he

Snrnple

Sy1. I'm. Unsnt. i\roin. 011s. Calc.