CHROMATOGRAPH GIVES BOILING-POINT

The boiling range of a petroleum product is one of its chief specifications, partly because distillation is one of the principal processes used to separate one product from another. Process control and specification testing are accomplished by using several conventional laboratory distillation procedures. This report shows how gas chromatography can be used as an easy substitute for these distillation testing procedures. It is presented under the headings - methods compared; gas chromatographic methods; principles of operation; system performance; the future. Results obtained by various ASTM methods are tabulated and compared with each other.