title: [Determination of trace amounts of mercury by spectrophotometric method with 2-hydroxy-5-sulfobenzenediazoaminoazobenzene].
abstract: The chromogenic reaction of 2-hydroxy-5-sulfobenzenediazoaminoazobenzene (HSDAA) with mercury was studied. In the presence of Triton X-100 and in a borax-buffer solution of pH 10.30, mercury(II) reacted with HSDAA to form a stable orange-red complex with molar radio of 1:2. The apparent molar absorptivity was 1.67 x 10(5) x L mol(-1) x cm(-1) with the maximum absorption wavelength of 519 nm. Beer's law was obeyed in the concentration range of 0-600 microg x L(-1) for Hg(II). The method was applied to the determination of trace amounts of mercury in water with satisfactory results.
authors.affiliation: Biology and Chemistry Engineering Institute, Guangzhou University, Guangzhou 510405, China.
authors.forename: Xiao-an
authors.initials: XA
authors.lastname: Cao
authors.forename: Yong-heng
authors.initials: YH
authors.lastname: Chen
authors.forename: Hua-min
authors.initials: HM
authors.lastname: Lin
mesh_terms: D008628:Mercury / Q000032:analysis*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D008628:Mercury