Titian in his paintings used mercury(II) oxide to obtain a particular shade of r

Question

Titian in his paintings used mercury(II) oxide to obtain a particular shade of red.
Analysis for mercury, using X-ray methods of the red paint in genuine Titians yields an
average value of 2.7 mg/g. You have been asked to authenticate a painting recently
found in an old farmhouse in Italy and attributed to Titan. You analyze the red paint
using X-ray methods for mercury with the following results.
Determination Hg, mg/g
1                         2.4
2                         2.3
3                         2.5
4                         2.2
5                         2.1
What can you say about the authenticity of the painting?

Explanation / Answer

The painting is not a Titian.

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