Portable meter to measure chlorophyll, nitrogen and water and methods
First Claim
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1. A method for determining chlorophyll content, comprising:
- providing a sample;
subjecting the sample to light at a first wavelength and detecting a first wavelength response;
subjecting the sample to light at a second wavelength and detecting a second wavelength response;
subjecting the sample to light at a third wavelength and detecting a third wavelength response; and
calculating a chlorophyll content of the sample with a device for determining chlorophyll content based on at least the first wavelength response, the second wavelength response, and the third wavelength response.
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Abstract
Methods for determining chlorophyll content comprise providing a sample, subjecting the sample to light at a first wavelength and detecting a first wavelength response, subjecting the sample to light at a second wavelength and detecting a second wavelength response, and calculating a chlorophyll content of the sample based on at least the first wavelength response and the second wavelength response. Optional approaches include detecting the nitrogen content and/or water content of the sample. Associated apparatus for determining chlorophyll content, which may comprise a handheld device, is also disclosed.
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Citations
50 Claims
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1. A method for determining chlorophyll content, comprising:
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providing a sample; subjecting the sample to light at a first wavelength and detecting a first wavelength response; subjecting the sample to light at a second wavelength and detecting a second wavelength response; subjecting the sample to light at a third wavelength and detecting a third wavelength response; and calculating a chlorophyll content of the sample with a device for determining chlorophyll content based on at least the first wavelength response, the second wavelength response, and the third wavelength response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 49, 50)
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18. A device for determining chlorophyll content, comprising:
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a sample receiving area configured to accommodate a sample during testing; a light source positioned adjacent the sample receiving area and operable to subject a sample in the sample receiving area to at least three different wavelengths of light; a photodetector operatively arranged adjacent the sample receiving area and configured to detect responses to the at least three different wavelengths of light; and a microprocessor connected to the light source and to the photodetector, the microprocessor controlling the light source and the photodetector and calculating a chlorophyll value of a sample based on at least the responses to the at least three different wavelengths of light. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 48)
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46. A method for determining chlorophyll content, comprising:
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providing a sample; subjecting the sample to light at multiple different wavelengths; detecting a response for each of the different wavelengths; determining a water content of the sample; calculating a chlorophyll content of the sample with a device for determining chlorophyll content based on the response for each of the different wavelengths and the determined water content of the sample. - View Dependent Claims (47)
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Specification