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color test

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color test [′kəl·ər ‚test]
(analytical chemistry)
The quantitative analysis of a substance by comparing the intensity of the color produced in a sample by a reagent with a standard color produced similarly in a solution of known strength.
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In color tests, acidity is indicated by a gradual changing from pink to red; the brighter the color the greater the degree of acidity.
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Stierlin says an archaeologist at the time had hoped to produce a new portrait of the queen wearing a necklace he knew she had owned, and was also looking to carry out a color test with ancient pigments found at the digs.
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The historian said the archaeologist had hoped to produce a new portrait of the queen wearing a necklace he knew she had owned and also carry out a color test with ancient pigments found at the digs.
Famed Nefertiti bust a fake, says Swiss art historian by Daily News Egypt (Egypt)
 
 
 
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