GB/T 18608-2012 (English Version) PDF

Standard No.: GB/T 18608-2012
Language: Chinese, Available in English version
Release Date: 2012
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 18608-2012
Replace: GB/T 18608-2001

Scope: This standard specifies two methods for the determination of nickel, vanadium, iron and sodium in crude oil and residual oil by flame atomic absorption spectrometry, including method A--determination of nickel, vanadium and iron in samples by acid digestion method and method B --The organic solvent method is used to determine the content of nickel, vanadium and sodium in the sample. Method B uses oil-soluble metal elements as standard samples to determine the content of oil-soluble metal elements. It is not suitable for the quantitative determination of samples containing non-oil-soluble particles, so , the total content of metal elements measured by this method may be low, especially for the determination of sodium in the form of inorganic sodium salts. This standard is applicable to the determination of nickel, vanadium, iron, and sodium in crude oil and residual oil. For different elements The precision of the two determination methods is different, and the appropriate method can be selected according to the precision requirements of the specific analysis.

GB/T 18608-2012 Referenced Document

2012 GB/T 18608-2012 Determination of nickel, vanadium, iron, and sodium in crude oils and residual fuels by flame atomic absorption spectrometry
2001 GB/T 18608-2001 Standard test methods for determination of iron, nickel,sodium,and vanadium in crude oil by atomic absorption spectrometry