Up to which absorption is it possible to measure?
Maximum measurable absorption is defined by the range of linearity of the spectrophotometer used (see question 7). Spectrophotometers with the greatest linear range found on the market allow measurements up to 10A. Information on higher absorptions, which can occasionally be found in literature concerning these applications, has to be looked at as reference values. They just state the equivalent theoretical values which would occur when measuring an undiluted sample in a cell with a light path of 10 mm. When using a spectrophotometer with a linear measuring range of up to 1.7A, it would equate to a theoretical absorption of 85A when using a TrayCell with 0.2 mm path length, compared to a cell with 10 mm light path.
