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Method of judging absorption capacity of carbon dioxide absorbent

A carbon dioxide, absorptivity technology, applied in the direction of passing absorption, gas analyzer structural detail, color/spectral property measurement, etc., can solve problems such as difficulty in determining replacement time, eliminate differences, improve S/N ratio, and improve measurement. The effect of precision

Inactive Publication Date: 2009-04-29
OTSUKA PHARM CO LTD
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  • Application Information

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Problems solved by technology

Therefore, it is difficult to determine the replacement time

Method used

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  • Method of judging absorption capacity of carbon dioxide absorbent
  • Method of judging absorption capacity of carbon dioxide absorbent
  • Method of judging absorption capacity of carbon dioxide absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] With gas samples pressurized at various levels and with no gas samples pressurized, determine 12 CO 2 The change Δ of a gas sample with a concentration of 1% 13 c.

[0147] The gas sample used in this example is not a patient breath sampled as sample gas or reference gas, but is contained in a single breath sampling bag of larger size 12 CO 2 Air with a concentration of 1%. The breath sampling bag has two outlets connected to nozzles N1 and N2. Since the same gas sample is used for measurement in this example, the variation Δ 13 C should normally be zero.

[0148] Table 2 shows the change Δ 13 C Based on the measurement results obtained when performing 10 measurements by additionally injecting 0ml (1atm), 5ml (approximately 1.25atm), 10ml (approximately 1.5atm), 15ml (approximately 1.75atm), and 20ml (approximately 2atm) of gas calculate.

[0149] Table 2 (%)

[0150]

[0151] Indicate Δ 13 The relationship between additional injection amount and standard ...

Embodiment 2

[0155] Soda lime (a mixture of sodium hydroxide and calcium hydroxide) is used as a carbon dioxide absorber. The reaction is shown below.

[0156] CO 2 +H 2 O+2NaOH→Na 2 CO 3 +2H 2 o

[0157] Na 2 CO 3 +Ca(OH) 2 →CaCO 3 +2NaOH

[0158] Multiple measurements are performed per day, the overall usage time and intensity ratio of the CO2 absorber 12 The relationship between Ratio is plotted in the diagram shown in Figure 17. As can be seen in Figure 17, when the overall time passes through about 300 hours, the intensity ratio 12 Ratio increases dramatically.

[0159] In addition to the above measurements, by using the standard gas prepared using the same carbon dioxide absorbent and 12 CO 2 The gas sample with a concentration of 1% is used as the sampling gas, and the calculation 13 Δ in C 13 C changes. The gas sample used in this example is not a patient breath sampled as sample gas or reference gas, but is contained in a single breath sampling bag of larger size...

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Abstract

The invention provides a judging method of carbon dioxide absorbent in isotope gas analytical measurement. There are arranged a first process in which air passing through a container holding a carbon dioxide absorbent is introduced into a cell to measure the quantity of light and a second process in which air not passing through the container holding the carbon dioxide absorbent is introduced into the cell to measure the quantity of light. The quantity of light measured in the first process and the quantity of light measured in the second process is used to judge the capacity of the carbon dioxide absorbent.

Description

[0001] This application is a patent application with the application number 01816285.1, the application date is September 19, 2001, and the invention title is "a stable isotope measurement method for spectral analysis of isotopic gases and a method for determining the absorption capacity of carbon dioxide absorbents" divisional application. technical field [0002] Isotope analysis is useful for disease diagnosis in medical applications in which metabolic functions of a living body can be determined by administering a drug containing an isotope to the living body and then detecting changes in the isotope concentration ratio. [0003] The invention relates to a stable isotope measurement method, which is used for spectral analysis of isotope gas, and determines the concentration ratio of isotope gas according to the difference in light absorption characteristics between isotopes. Background technique [0004] A bacterium called Helicobacter pylori (HP) is generally thought to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/35A61B5/083G01N33/00
CPCG01N21/3504G01N2021/3536Y02C10/06G01N33/004A61B5/0836G01N21/17Y02A50/20
Inventor 森正昭久保康弘三好正彦浜尾保水井宏明
Owner OTSUKA PHARM CO LTD
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