STANDARD SAMPLE COMPOSITION FOR CHECKING DETERMINATION OF ORGANOCHLORINE COMPOUNDS IN PETROLEUM Russian patent published in 2007 - IPC G01N33/22 

FIELD: analytical methods for petroleum products.

SUBSTANCE: invention aims at being used as metrological provision for methods of performing measurements when determining organochlorine compounds in petroleum. Composition represents a mixture containing of petroleum oil with boiling temperature not below 250°C (50-80%), paraffins (10-40%) and monoaromatic hydrocarbons (5-20%) both with boiling temperature not higher than 220°C, and an organochlorine compound with boiling temperature not higher than 100°C (1·10^-2-6·10^-2%). Use of such a standard sample will improve quality of analysis, because of allowing checking all sampling stages, including fractionation distillation to isolate ligroin as well as stage wherein organochlorine compounds are converted into chloride ion form for subsequent determination of chloride ions using known procedures.

EFFECT: improved accuracy and reliability of analysis.

15 cl, 2 tbl, 3 ex