For accurate UV-Vis analysis under a range of conditions Agilent's premium quality rectangular cells are a perfect choice. Whether for use in routine, low concentration or highly corrosive samples, the rectangular cells provide effective performance every time and are available in a range of models. 10 mm pathlength cells, provided in matched pairs, are used for routine UV-Vis analysis and longer pathlength (20-50 mm) cells area also available to provide extra sensitivity in low concentration samples. Another version of long pathlength cells is available for corrosive solutions as used in American Public Health Association (APHA) color analysis. Disposable polystyrene cells eliminate cleaning and can be used with magnetic stirrers.