(from the article `colorimetry`) ...d1/d2, times the known concentration (c1). If a photoelectric cell instead of the eye is used to compare intensities, the instrument is called a ...
Found on
http://www.britannica.com/eb/a-z/p/60
electrophotometer, photoelectric colorimeter A colorimeter that uses a phototube or photocell, a set of color filters, an amplifier, and an indicating meter for quantitative determination of color.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1302/13
No exact match found.
