METHODS AND DEVICES FOR DETECTING MERCURY ISOTOPES IN CRUDE OIL
First Claim
1. A device for detecting mercury isotopes in crude oil, which comprises an enrichment-absorption system and a secondary purification-enrichment system for mercury isotopes, wherein the enrichment-absorption system comprises an air-background mercury absorption system, a pyrolysis/cracking system, and a mercury-sample absorption system connected in series with pipe lines, and a vacuum pump, wherein the vacuum pump is connected to the mercury-sample absorption system through a pipe line;
- andthe secondary purification-enrichment system comprises a nitrogen-gas cylinder, a collection bottle with potassium-permanganate absorption liquid, and a secondary enrichment-absorption bottle connected in series with pipe lines, wherein the secondary purification-enrichment system further comprises a stannous-chloride storage bottle, which is connected to a pipe line between the nitrogen-gas cylinder and the collection bottle with potassium-permanganate absorption liquid via a peristaltic pump and through a pipe line.
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Abstract
The present disclosure relates to a method and device for detecting mercury isotopes in crude oil. The device comprises an enrichment-absorption system and a secondary purification-enrichment system for mercury isotopes, wherein the enrichment-absorption system includes an air-background mercury absorption system, a pyrolysis/cracking system, a mercury-sample absorption system connected in series with pipe lines, and a vacuum pump, and the vacuum pump is connected to the mercury-sample absorption system through a pipe line; the secondary purification-enrichment system includes a nitrogen-gas cylinder, a collection bottle with potassium permanganate absorption liquid, and a secondary enrichment-absorption bottle connected in series with pipe lines, wherein the secondary purification-enrichment system further includes a stannous-chloride storage bottle, which is connected to a pipe line between the nitrogen-gas cylinder and the collection bottle with potassium-permanganate absorption liquid via a peristaltic pump and through a pipe line.
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Citations
19 Claims
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1. A device for detecting mercury isotopes in crude oil, which comprises an enrichment-absorption system and a secondary purification-enrichment system for mercury isotopes, wherein the enrichment-absorption system comprises an air-background mercury absorption system, a pyrolysis/cracking system, and a mercury-sample absorption system connected in series with pipe lines, and a vacuum pump, wherein the vacuum pump is connected to the mercury-sample absorption system through a pipe line;
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the secondary purification-enrichment system comprises a nitrogen-gas cylinder, a collection bottle with potassium-permanganate absorption liquid, and a secondary enrichment-absorption bottle connected in series with pipe lines, wherein the secondary purification-enrichment system further comprises a stannous-chloride storage bottle, which is connected to a pipe line between the nitrogen-gas cylinder and the collection bottle with potassium-permanganate absorption liquid via a peristaltic pump and through a pipe line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for detecting mercury isotopes in crude oil, wherein the method comprises the steps of:
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(1) primary enrichment;
heating a crude oil sample to perform pyrolysis and cracking until the crude oil sample is completely cracked, absorbing the gas released by heating the crude oil sample with an acidic potassium permanganate aqueous solution to enrich the mercury element in the crude oil sample, and collecting all of the acidic potassium permanganate solution in which the mercury element is enriched in step (1);(2) mercury purification and enrichment;
reducing the mercury absorbed in the step (1) to mercury vapor with a stannous chloride solution, and then purifying and enriching the mercury vapor by using an acidic potassium permanganate aqueous solution;(3) detecting the acidic potassium permanganate solution in which the mercury vapor is enriched in step (2) to determine the total mercury content therein; (4) detecting the acidic potassium permanganate solution in which the mercury vapor is enriched in step (2) to determine the composition/content of stable mercury isotopes therein. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification