Method and device for determining radioactive intensity of methane

A technology of radioactivity and methane, which is applied in the field of measuring the radioactive intensity of C-14-labeled methane, can solve the problems of radioactive strength and difficulty in accurate measurement, and achieve the effects of fast analysis speed, preventing interference and increasing the contact area

Inactive Publication Date: 2011-01-19
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology reduces losses caused by injecting small amounts (methanes) from an unknown source like coal or oil without losing important gases such as hydrogen sulfide that are commonly found naturally occurring substances present at different levels within our planet's creation areas. By adding certain chemical agents called oxyanions, these techniques can improve their effectiveness while reducing unwanted side reactions. Additionally, it allows for precise measurements over longer periods through direct injection of methylene onto specific locations inside crystals containing calcium salts. Overall, this method provides technical benefits including improved sensitivity, faster response times, ease of handling, easy implementation, quicker analysis time, reduced environmental impact, lower cost compared to other methods used alone, and increased ability to detect trace quantities of volatile organic compounds (VOC).

Problems solved by technology

This patented technical problem addressed in the patents relates to measuring the amount of radiocarbon compound released from crops during decomposing processes such as decay or bacterial breakdown for studying biological mechanisms related to these reactions. Current methods require expensive equipment like atomic fluorescence spectrometry instruments at very low temperatures, making them difficult to use outside laboratories due to their limited availability.

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  • Method and device for determining radioactive intensity of methane
  • Method and device for determining radioactive intensity of methane
  • Method and device for determining radioactive intensity of methane

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Embodiment 1

[0021] A method for measuring the radioactive intensity of C-14 labeled methane, the steps are:

[0022] Open the tubular muffle furnace 6 and set the temperature to 750°C; feed oxygen to discharge the air in the system to prevent the influence of residual gas; open the condensed water switch on the condenser 9; use the syringe 1 to take 30-60ml gas samples and insert them Control the interface of the L-shaped needle 4; add 10ml of alkaline scintillation fluid in the scintillation counting bottle 12, and place the L-shaped needle 13 at the bottom of the scintillation counting bottle 12 to absorb the CO generated 2 ; When the temperature reaches 750℃, turn down the oxygen (50cm 3 / min), open the switch of the controllable L-shaped needle 4, slowly (5-10 minutes) press the gas sample in the syringe 1 into the high-temperature resistant quartz tube 5, and catalyze and oxidize it to CO under the high temperature condition of the cobalt silica gel 7 2 , CO 2 After the gas is coole

Embodiment 2

[0026] Combine below figure 1 The present invention is described in further detail:

[0027] according to figure 1 It can be seen. A device for measuring the radioactive intensity of C-14 labeled methane, which consists of a syringe 1, an oxygen tube 2, a first high-temperature-resistant rubber stopper 3a, a second high-temperature-resistant rubber stopper 3b, a controllable L-shaped needle 4, and a high-temperature-resistant quartz Tube 5, tubular muffle furnace 6, cobalt salt silica gel 7, water outlet 8, condenser 9, water inlet 10, buffer tube 11, scintillation counting bottle 12, and L-shaped needle 13. The connection relationship is: the syringe 1 is connected to the controllable L-shaped needle 4, the syringe 1 and the controllable L-shaped needle 4 pass through the first high-temperature-resistant rubber stopper 3a and inserted into the high-temperature-resistant quartz tube 5; the oxygen-through tube 2 is also inserted into the high-temperature-resistant In the quartz

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Abstract

The invention discloses method and device for determining radioactive intensity of methane. The method comprises the steps of: A, oxidizing a methane sample, marked with C-14, with O2 into CO2 through high-temperature silica gel immobilized with cobalt chloride in a sealed condition, then continuing to import oxygen; B, absorbing CO2 in gas generated by the oxidation with an alkaline scintillation solution after the CO2 is condensed and purified; and C, uniformly shaking an absorption liquid, and directly measuring the C-14 radioactive intensity of a mixed liquid with a liquid scintiloscope. The invention further discloses a device for determining radioactive intensity of C-14 marked methane, wherein an injector is connected with a controllable L-shaped needle head, the injector and the controllable L-shaped needle head are inserted into a high-temperature resistant quartz tube after passing through a high-temperature resistant rubber stopper, an oxygen tube is inserted into the high-temperature resistant quartz tube, the high-temperature resistant quartz tube is threaded through a tubular muffle furnace, and the high-temperature resistant quartz tube and the high-temperature resistant rubber stopper are connected with a condenser, a buffer tube and the L-shaped needle head through glass tubes in sequence. The method and the device have the characteristics of fast and convenient operation and high accuracy, and are suitable for the analysis of the radioactive intensity of C-14 marked methane and the determination of a sample with less C-14 content.

Description

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Claims

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Application Information

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Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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