| colourimeter | A device used to find out the concentration of particles suspended in a solution or a liquid medium by beaming light through it and measuring the amount of light that makes it out the other side. (The process is a part of the study of spectroscopy.) The device can be used to measure turbidity, or the amount of bacterial cells in a medium. The method of colourimetry is based on the Beer-Lambert Law. (09 Oct 1997) |
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| Duboscq's colourimeter | An apparatus for measuring the depth of tint in a fluid by comparing it with a standard fluid; glass cylinders are immersed in each of two cups one containing standard fluid, the other the fluid to be tested; on looking through the cylinders, the tints are equalised by raising or lowering the cylinder in one cup, and the extent of this raising or lowering is indicated on a scale and gives the exact difference in tint. (05 Mar 2000) |
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