Method for determining the pH value of a liquid and sensor arrangement
First Claim
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1. A method for determining the pH value of a liquid comprising:
- exciting liquid molecules in the liquid using light with a predetermined wavelength;
capturing by a detector apparatus an intensity component, transmitted by the liquid in a predetermined wavelength range, of the light used for excitation;
producing by the detector apparatus at least one of a wavelength absorption characteristic and an intensity absorption characteristic from the captured intensity component; and
relating the produced absorption characteristic produced by the detector apparatus to a reference absorption characteristic associated with a specific pH value of the liquid to determine the specific pH value of the liquid.
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Abstract
A system and method for determining the pH value of a liquid. The system and method excite the liquid molecules in the liquid by light with a predetermined wavelength and an intensity component, transmitted through the liquid in a predetermined wavelength range, of the light used for excitation is captured. This intensity component is used to produce a wavelength/intensity absorption characteristic and this absorption characteristic is related to a reference absorption characteristic associated with a specific pH value of the liquid. The system and method thus can be used to obtain drinking water from a fuel for aircraft.
14 Citations
20 Claims
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1. A method for determining the pH value of a liquid comprising:
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exciting liquid molecules in the liquid using light with a predetermined wavelength; capturing by a detector apparatus an intensity component, transmitted by the liquid in a predetermined wavelength range, of the light used for excitation; producing by the detector apparatus at least one of a wavelength absorption characteristic and an intensity absorption characteristic from the captured intensity component; and relating the produced absorption characteristic produced by the detector apparatus to a reference absorption characteristic associated with a specific pH value of the liquid to determine the specific pH value of the liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensor arrangement for determining a pH value of a liquid comprising:
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a light source configured to irradiate the liquid with light that excites liquid molecules of the liquid; a carrier apparatus configured to position the liquid in a beam path of the light used for excitation; a detector apparatus configured to capture an intensity component transmitted through the liquid of the light used for excitation; and a conversion apparatus configured to produce at least one of a wavelength absorption characteristic and an intensity absorption characteristic from the captured intensity component, and to relate the produced absorption characteristic to a reference absorption characteristic associated with a specific pH value of the liquid to determine the specific pH value of the liquid. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification