Improved determination of mercury complex with Thiomicher's ketone by beta-correction spectrophotometry

Determination of the mercury complex formed with Thiomicher's ketone (TMK) was improved by beta-correction spectrophotometry in the presence of a noni onic surfactant at pH 5. The complex formed was Hg(TMK)(2), and its true mo lar absorptivity is reported for the first time: epsilon(Hg(TMK)2)(560) = 1 .04 x 10(5) L/mol.cm. In addition, the stability constant of Hg(TMK)(2) was equal to 3.64 x 10(10) at an ion strength of 0.01 at 20 degrees C. Results from analyses of wastewater samples showed that the relative standard devi ations were less than or equal to 8.3%, and the recoveries of mercury range d from 90 to 110%.