characteristic partial internal absorbance Ac (Ac = lg(Φr / Φs ) = εbc) #01857OIML <p>1. The characteristic partial internal absorbance has the dimension one and is expressed with the derived coherent SI unit one (1). <br />2. The absorbance of the optical cell containing this solution is corrected for. Conditions for validity: see 2.9. <br />3. Adapted from ISO 6286, Table 2, Nos. 19 and 20.</p>