excess

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excess

1. Chem a quantity of a reagent that is greater than the quantity required to complete a reaction
2. Commerce payable as a result of previous underpayment
References in periodicals archive ?
The use of proteotypic peptides along with liquid chromatography-tandem mass spectrometry (LC-MS/ MS), a technique that does not suffer from antigen excess, has emerged as a useful tool for quantifying proteins (9-12).
In this particular case, the patient had extremely high [kappa] FLC concentrations that caused antigen excess and an artifactually low reading before treatment.
The "limitations" section of the product insert from the company does alert the user to the possibility of this phenomenon, but to our knowledge this report is the 1st to demonstrate that the problem of antigen excess in this assay is not merely theoretical but can actually occur clinically.
Dilution study results excluded antigen excess and the presence of a prozone, but a serum total (bound and free) light chains (Dade Behring) showed a marked increase of [kappa] (20.
Falsely low concentrations are encountered regularly in immunoturbidimetric assays as a result of antigen excess (3).
A limitation of IFE procedures is the prozone artifact caused by antigen excess (19), a problem that is avoided with immunoblotting.
Problems of antigen excess occur, with even robust immunoassays for total light chains yielding falsely low light-chain concentrations and thus missing the diagnosis of potentially serious conditions such as light chain myeloma or light chain amyloidosis.
The purpose of this study was to evaluate the analytical performance of these Abbott Aeroset specific-protein assays and, in particular, their ability to correctly handle antigen excess frequently found in immunoglobulin estimations.