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An anthraquinone-based highly selective colorimetric and fluorometric sensor for sequential detection of Cu <sup>2+</sup> and S <sup>2−</sup> with intracellular application

https://doi.org/10.1039/c7tb01596h
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Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.

2 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.

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The 2 references without a DOI — listed, not checked
no DOI — not checkedR. E. Gosselin , R. P.Smith , H. C.Hodge and J. E.Braddock , Clinical Toxicology of Commercial Products , Williams and Wilkins , Baltimore, MD , 5th edn, 1984 , pp. III-198–III-202
no DOI — not checkedWorld Health Organization Guidelines forDrinking Water Quality, World Health Organization, Geneva, 3rd edn, 2004, p. 335
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