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.
In conclusion, we have illustrated that antigen excess can cause falsely low serum FLC results with nephelometric techniques.
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.