Bis-[2[(tetrahydro-2H-pyran-2-yl)thio]phenyl]diazine: A new colorimetric reagent for mercury.
The synthesis of bis-[2-[(tetrahydro-2H-pyran-2-yl)thio]phenyl] diazine is reported and its potential as a spectrophotometric reagent for Hg(2+) is explored. The dye reacts in 1:1 stoichiometry with Hg(2+) and the product of this reaction, which is extracted into chloroform, has a molar absorptivity of 3.20 x 10(3) l.mole(-1).cm(-1) at 525 nm and obeys Beer's law in the range 0-50 ppm Hg(2+).
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