发明授权
- 专利标题: Hand held glucose colorimeter device
- 专利标题(中): 手持式葡萄糖色度计装置
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申请号: US176331申请日: 1988-03-31
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公开(公告)号: US4949400A公开(公告)日: 1990-08-14
- 发明人: Harry H. Leveen , William F. Kahler , Stephen D. Kahler
- 申请人: Harry H. Leveen , William F. Kahler , Stephen D. Kahler
- 专利权人: Leveen Harry H,Kahler William F,Kahler Stephen D
- 当前专利权人: Leveen Harry H,Kahler William F,Kahler Stephen D
- 主分类号: G01N21/25
- IPC分类号: G01N21/25 ; G01N21/86
摘要:
A method and apparatus for increasing the sensitivity and accuracy of apparatus used in chemical analysis utilizing the colorimeter method. The method employs two or more light emitting diodes which emit light at different wavelengths. The emission wavelength of the L.E.D. is automatically switched to an L.E.D. which most closely matches any desired absorption band in the solution being analyzed so that more or less absorption will occur in each range. A logic circuit which utilizes the initial optical density to choose the proper L.E.D. for the particular range of concentration of chromophore. Thus, a green emitting diode may be used to register an initial color change and automatically switched to a red L.E.D. at any chosen concentration.
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