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Component concentration measurement method and device

  • US 7,239,904 B2
  • Filed: 05/07/2003
  • Issued: 07/03/2007
  • Est. Priority Date: 05/08/2002
  • Status: Expired due to Fees
First Claim
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1. A component concentration measurement method, comprising:

  • a first step of irradiating light onto an object of measurement with the object of measurement in a first magnetic field state, and detecting a state of light from the object of measurement at this time;

    a second step of irradiating light onto the object of measurement with the object of measurement in a second magnetic field state different from the first magnetic field state, and detecting a state of light from the object of measurement at this time; and

    a third step of calculating the concentration of a target component based on a detection result in the first step and a detection result in the second step;

    wherein in the first and second steps, the state of light from the object of measurement is detected as the absorbance or the amount of light; and

    wherein in the third step, the concentration of the target component is calculated based on the difference Δ

    between the absorbance or the amount of light measured in the first step and the absorbance or the amount of light measured in the second step.

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