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Clinical Chemistry 14: 1172-1175, 1968;
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Clinical Chemistry, Vol 14, 1172-1175, Copyright © 1968 by the American Association for Clinical Chemistry

Mercurimetric Determination of Chloride in Biologic Fluids Using 2-(8-Hydroxyquinolyl-5-azo)-Benzoic Acid (QBA*)

E. Melvin Gindler 1

1 Department of Pathology, Rockford Memorial Hospital, Rockford, Ill. 61103.

2-(8-Hydroxyquinolyl-5-azo)-benzoic acid (QBA) may be substituted for s-diphenylcarbazone as an indicator in the direct mercurimetric titration of chloride ion in biologic fluids. Both indicators give color changes at the same point in the titration. In dilute nitric acid, the Hg(II)-QBA complex is rose-red, whereas unmetallized QBA is orange.

Submitted on February 9, 1968
Accepted on March 15, 1968






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Copyright © 1968 by the American Association for Clinical Chemistry.