GB/T 3209-2009 English PDF (GBT3209-2009)

This standard specifies the test principles for determining the amount of distillation residual of benzene-type product, specimen collection, reagents, instruments, test procedures, result calculations, precision. This standard applies to the determination of the amount of distillation residual of coking benzene, coking toluene, coking xylene. Petroleum benzene products may also make reference to this standard.