出典:Wiktionary
出典:『Wiktionary』 (2008/12/29 20:54 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2010/04/03 16:54 UTC 版)
In chemistry, the path length is defined as the distance that light (UV/VIS) travels through a sample in an analytical cell. Typically, a sample cell is made of quartz, glass, or a plastic rhombic cuvette with a volume typically ranging from 0.1 mL to 10 mL or larger used in a spectrophotometer. For the purposes of spectrophotometry (i.e. when making calculations using the Beer-Lambert law) the path length is measured in centimeters (rather than in meters).