[Determination of trace amounts of mercury by spectrophotometric method with 2-hydroxy-5-sulfobenzenediazoaminoazobenzene].
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.
Cao
Xiao-an
XA
Biology and Chemistry Engineering Institute, Guangzhou University, Guangzhou 510405, China.
Chen
Yong-heng
YH
Lin
Hua-min
HM
D008628:Mercury / Q000032:analysis*; D013053:Spectrophotometry / Q000379:methods*
D008628:Mercury