Inner Product of RGB Unit Vectors for Simple and Versatile Detection of Color Transition

We propose a novel concept for detecting color transition by the inner product (IP) of RGB unit vectors. A digital microscope-based detector and a Visual Basic program were developed in-house. The concept is applied to indicator-based flow titration. The IP is 1 or < 1 if the vector’s direction i...

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Bibliographic Details
Published inAnalytical Sciences Vol. 37; no. 1; pp. 3 - 5
Main Authors KAKIUCHI, Naoya, OCHIAI, Junya, TAKEUCHI, Masaki, TANAKA, Hideji
Format Journal Article
LanguageEnglish
Published Singapore The Japan Society for Analytical Chemistry 01.01.2021
Springer Nature Singapore
Japan Science and Technology Agency
Subjects
Analytical Chemistry
Chemistry
Color
digital microscope
flow ratiometry
flow titration
Image-based colorimetry
inner product
Rapid Communications
RGB
Titration
flow ratiometry
digital microscope
inner product
RGB
flow titration
Image-based colorimetry
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Summary:We propose a novel concept for detecting color transition by the inner product (IP) of RGB unit vectors. A digital microscope-based detector and a Visual Basic program were developed in-house. The concept is applied to indicator-based flow titration. The IP is 1 or < 1 if the vector’s direction is the same or different, respectively. The IP’s change can be used as a criterion for the indicator’s color transition. The present IP-based approach is simple, economical, and versatile because it is applicable to any color transition without selecting an analytical wavelength.
Bibliography:ObjectType-Article-1
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ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.20C015