3 results about "Sample viscosity" patented technology

The utility model relates to double -chamber series connection type dilution pretreatment device, aims at solving current double -chamber series connection structure, and the mixing assembly of connecting pipeline is static design more, when processing high viscosity sample or the scene of flow fluctuation is bigger, easy to appear " short circuit flow " or " dead volume " phenomenon, lead to dilution evenness decline, influence the quality of the technical problem of pretreatment, including: bottom plate, bottom plate top two sides are equipped with first pretreatment cavity and second pretreatment cavity respectively, first pretreatment cavity height is higher than second pretreatment cavity, and both are connected in series through intercommunication mechanism, the utility model can adjust mixing intensity in real time according to sample viscosity and flow fluctuation through drive assembly drive mixing assembly active rotation, avoid static spiral piece or baffle appearing " short circuit flow " when flow sudden change, namely liquid is not mixed directly through fully, ensure that sample and diluent form global turbulence in connecting pipe, eliminate " dead volume ".

The application discloses a kind of targeted thickening polymer shell breaking and effect time test determination methods, comprising the following steps: S1 preparation targeted thickening polymer solution;S2 targeted thickening polymer solution oxygen removal;S3 test different time point sample viscosity;S4 draw sample different aging time and viscosity curve, determine targeted thickening oil displacement agent initial shell breaking time point and effect time point, the application is applicable to oil and gas field development technical field, by simulating formation environment to test shell breaking and effect time, for different types of reservoirs to provide strong basis for optimum polymer, monitor the performance of targeted thickening polymer, ensure the injection quality of polymer in the field, simple to operate, short time, high efficiency, for improving chemical oil displacement precision, more significantly improve recovery, with great research value and application prospect.

This invention relates to the fields of analytical detection and online solid-phase extraction technology, specifically to a rapid detection method for trace plasma samples used in pharmacokinetic studies. The method first measures the empty baseline pressure; after injection, it calculates the net sample pressure and total resistance integral in real time, and identifies the transition point from injection to cleaning to lock the fluid dynamics boundary parameters; during the cleaning phase, it calculates the measured pressure decay rate and extrapolates the theoretical pressure decay rate under ideal emptying conditions, uses the total resistance integral to compensate for viscosity at the measured rate, and then obtains the flow hysteresis ratio characterizing the sample matrix retention effect based on both; finally, it uses the flow hysteresis ratio to adaptively correct a standard threshold to obtain a target threshold, and performs flow path switching when the measured rate reaches the target. This invention effectively decouples sample viscosity from adsorption characteristics, enabling adaptive adjustment of the cleaning time based on real-time sample kinetic feedback, completely eliminating matrix residue contamination while ensuring the recovery rate of polar drugs.