title: Improved determination of mercury complex with Thiomicher's ketone by beta-correction spectrophotometry.
abstract: Determination of the mercury complex formed with Thiomicher's ketone (TMK) was improved by beta-correction spectrophotometry in the presence of a nonionic surfactant at pH 5. The complex formed was Hg(TMK)2, and its true molar 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 deviations were < or = 8.3%, and the recoveries of mercury ranged from 90 to 110%.
authors.affiliation: Anhui University, School of Chemistry and Chemical Engineering, Hefei, People's Republic of China.
authors.forename: H W
authors.initials: HW
authors.lastname: Gao
authors.forename: S Y
authors.initials: SY
authors.lastname: Zhang
authors.forename: S M
authors.initials: SM
authors.lastname: Ye
mesh_terms: D002614:Chelating Agents / Q000032:analysis*; D004355:Drug Stability; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007659:Ketones / Q000032:analysis* / Q000737:chemistry; D017669:Mercury Compounds / Q000032:analysis* / Q000737:chemistry; D012680:Sensitivity and Specificity; D012996:Solutions; D013053:Spectrophotometry / Q000379:methods*; D014867:Water / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D007220:Industrial Waste; D007659:Ketones; D017669:Mercury Compounds; D012996:Solutions; D014867:Water