Hollow Cathode Atomic Absorption Lamp Cadmium (Cd) | Hitachi Brand

Hitachi branded Hollow Cathode Lamp Cadmium (Cd) Light Source The spectral width of an atomic absorption spectrum is very narrow (usually about 0.01 nm). To measure atomic absorption, a light source with narrower spectral width is necessary. The spectral width of the light source of the spectrophotometer is as wide as 1-2 nm. Therefore, an atomic absorption cannot be measured with a continuum source. In an atomic absorption photometer, a hollow cathode lamp (HCL) is used. The spectral width of an emission line (bright line) of a hollow cathode lamp is even narrower than a line in an atomic absorption spectrum. Background (BKG) "What is background?" In a photoabsorption measurement, an analytical line may be darkened due to causes other than absorption by a target metallic element. This darkening is called background. For example, in the case of sodium chloride (NaCl) in sea water, the wavelengths absorbed by Na, cadmium (Cd), and nickel (Ni) are overlapped. For a specimen containing a