bromcresol purple


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brom·cre·sol pur·ple

(brom-krē'sol pŭr'pil),
A substituted triphenylmethane dye (pKa 6.3), practically insoluble in water but soluble in alcohol and dilute alkalies; used as an indicator of pH (yellow at pH 5.2, purple at pH 6.8).
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The analytical methods used were as follows: for cTnT (plasma, urine), the Elecsys 2010 Immunoassay (Roche Diagnostics); for cTnI (plasma, urine), the Dimension RxL Immunoassay (Dade Behring); for creatinine (plasma, urine), a modified Jaffe reaction (Dade Behring) on a Dimension RxL; for albumin, a bromcresol purple (BCP) dye-binding method (Dade Behring) on a Dimension RxL; for [alpha]1M, an immunoturbidimetric assay (Roche Diagnostics) on a Hitachi 911; for creatine kinase (CK) and CK isoenzyme MB (CK-MB) in plasma, modifications of the ultraviolet enzymatic and the immunoinhibition methods, respectively, on a Dimension RxL; and for albumin and [alpha]1M in urine, an immunoturbidimetric assay (Roche Diagnostics) on a Hitachi 911.
The albumin in the eluate and in plasma from the original samples was determined with a bromcresol purple method on the IL Monarch.