Patents Assigned to 501 Instrumentation Laboratory S.p.A.
  • Stabilized Trinder reagent
    Patent number: 5108733
    Abstract: Spontaneous aspecific coloration in so-called Trinder reagents which can alter subsequent colorimetric determinations is inhibited by adding compounds of the chelating agent class to the solution. The resultant compositions contain a peroxidase enzyme, a phenylpyrazone derivative, a compound of phenolic or aromatic amine structure and a stabilizer. Preferred stabilizers are ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA).
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: April 28, 1992
    Assignees: Instrumentation Laboratory S.p.A., 501 Instrumentation Laboratory S.p.A.
    Inventors: Dario Frontini, Maurizio D'Alterio