Preparation of an oil sample fox X-ray fluorescence analysis
OwnerYasuhiro Ayukawa, Megumi Onoinventors
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Abstract
There is provided a method of preparing an oil sample for X-ray fluorescence analysis of the concentration of sulfur in the oil sample at a minimum limit of determination of about 10 to 30 ppb by concentrating sulfur through sedimentation or filtration. A liquid catalyst 15 from which S was removed almost completely is used, whereby S contained in an oil sample 16 is extracted, sedimented and concentrated as a silver sulfide-containing sulfur compound 18.
Claims21
A liquid catalyst used in a method of preparing an oil sample for X-ray fluorescence analysis of the concentration of sulfur in said oil sample,
- which is prepared by removing silver acetate, and silver sulfide-containing silver compounds and silver precipitated by irradiation with electromagnetic waves or corpuscular rays, by filtration from a mixed solution of a silver nitrate solution having silver nitrate dissolved in a solvent and a sodium acetate solution having sodium acetate dissolved in said solvent.
A method of preparing an oil sample for X-ray fluorescence analysis of the concentration of sulfur in said oil sample, comprising:
- adding a silver nitrate solution having silver nitrate dissolved in a solvent and a sodium acetate solution having sodium acetate dissolved in said solvent, as a liquid catalyst to said oil sample collected in a sample holder and stirring them, and
- irradiating the stirred solution with electromagnetic waves or corpuscular rays to precipitate silver sulfide-containing silver compounds and silver on a window in the bottom of said sample holder.
A method of preparing an oil sample for X-ray fluorescence analysis of the concentration of sulfur in said oil sample, comprising:
- adding a silver nitrate solution having silver nitrate dissolved in a solvent and a sodium acetate solution having sodium acetate dissolved in said solvent, as a liquid catalyst to said oil sample and stirring them, and
- irradiating the stirred solution with electromagnetic waves or corpuscular rays and filtering the solution through a filter membrane, to separate silver sulfide-containing silver compounds and silver on said filter membrane.
An X-ray fluorescence analysis method for analyzing the concentration of sulfur in the oil sample, comprising:
- adding a silver nitrate solution having silver nitrate dissolved in a solvent and a sodium acetate solution having sodium acetate dissolved in said solvent, as a liquid catalyst to the oil sample collected in a sample holder and stirring them,
- upward irradiating a window in the bottom of said sample holder with primary X-rays to precipitate silver sulfide-containing silver compounds and silver on said window while measuring the intensities of fluorescent X-rays emitted from the oil sample.
Dependencies are inferred from the claim text.