Determination of halogens in polymers and other petroleum products by a two-furnace combustion method

✍ Scribed by E.W. Seefield; J.W. Robinson

• Publisher: Elsevier Science
• Year: 1960
• Tongue: English
• Weight: 274 KB
• Volume: 23
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(60)80075-x

✦ Synopsis

Analyses of organic materials for halogens and sulfur were carried out for many years by time-consuming wet chemical methods. During recent years there has been a trend toward combustion methods 1-5 because of their rapidity and versatility with regard to sample type and concentration.

A high temperature (2500~ combustion method for determining chlorine and bromine was just recently presented by NICKSIC AND FARLEY 6. A primary advantage of this method was stated to be the use of sodium bisulfite scrubbing solution. This solution permits rapid burning of relatively large samples with quantitative conversion of organic chloride and bromide to the ionic form for subsequent titration.

A method very similar to the one described in the preceding paragraph was used at this laboratory for analyzing chlorinated and brominated polymers, gas oils and residua having concentrations of chlorine and/or bromine up to 2~o. In general, difficulty was encountered in burning samples larger than o.2 g. In addition, small size samples resulted in small titrations. Thus, the importance of the blank and the random errors in the titration were magnified. It appeared that a method capable of burning larger samples would minimize these errors. With these facts in mind, the I-"VYCOR" TUBE