250 results about "Spectrophotometric measurement" patented technology

A method and system for characterizing asphaltene gradients of a reservoir of interest and analyzing properties of the reservoir of interest based upon such asphaltene gradients. The analysis employs a correlation that relates insoluble asphaltene concentration to spectrophotometry measurement data measured at depth.

The invention discloses a high-sensitivity enzyme-linked immunoassay method. The method comprises the following steps of: according to a characteristic of specific binding of a measured object and an antibody (antigen), marking the antigen or the antibody and the corresponding antibody or antigen by a corresponding enzyme under a specific condition so as to achieve an absorption combination process, and indirectly representing the concentration of the measured object by the catalytic speed of the marked enzyme about a substrate. According to the high-sensitivity enzyme-linked immunoassay method provided by the invention, a problem of insufficient sensitivity of a regular enzyme-linked immunoassay based on a spectrophotometry is effectively overcome, and the high-sensitivity chemical oscillation dynamics detection and enzymatic dynamics analysis with specificity and flexibility amplification action are combined by utilizing an antibody-antigen specificity combination principle, so that the problems of low chemical oscillation selectivity and incapability of carrying out qualitative determination are overcome, thus the chemical oscillation in combination with the enzyme-linked immunoassay method can be used for qualitative and quantitative determination of substances such as medicine and pesticide micromolecules, antibody, antigen, specific protein, nucleic acid, disease factors and the like.