BROMINE NUMBER BY ELECTROMETRIC TITRATION: ASTM D2710
EXPLANATION
This test method determines the amount of bromine reactive materials in petroleum hydrocarbons and is thus a measure of trace amounts of unsaturation in these materials. An estimate of the quantity of these materials is useful in assessing the suitability of lighter fractions for use as reaction solvents.
It is applicable to materials with bromine indexes below 1000. Materials with higher than this bromine index should be tested using Test Method D1159. Industrial aromatic hydrocarbons should be tested using Test Method D1492. This test method is applicable only to essentially olefin-free hydrocarbons or mixtures that are substantially free from materials that are lighter than isobutane and have a distillation end point under 288° C (550° F).
TEST SUMMARY
A sample dissolved in a specified solvent is titrated with standard bromide-bromate solution. The end point is indicated by a dead drop electrometric titration apparatus, when the presence of free bromine causes a sudden change in the electrical conductivity of the system.
TEST PRECISION
Repeatability: 14
Reproducibility: 118
This test method has no bias.
