The present disclosure relates to an article inspection system and method, an electronic device, and a storage medium, and relates to the field of security inspection technology. The system includes: a pre-concentration sampling module configured to concentrate and sample gas molecule of the article under inspection to obtain a sample; a gas chromatography module; an internal circulation gas path module; and an ion migration tube module connected to the internal circulation gas path module and configured to form a fingerprint spectrum of the article under inspection from a spectrum of the pre-separated sample molecules, so as to identify a kind of the article under inspection according to the fingerprint spectrum. The present disclosure improves the efficiency and accuracy of article inspection, and realizes intelligent inspection of articles.

Techniques and apparatus for generating consensus libraries for sample matrices (Flow A) and using the consensus libraries to determine unknown-unidentified components of a sample (Flow B) are described. For example, in an embodiment, an apparatus may include at least one memory, and processing circuitry (220) coupled to said at least one memory, wherein said processing circuitry is adapted to receive a plurality of sample matrix data sets (210a-210n) for a sample matrix generated via mass analysis of said sample matrix, and to generate a consensus library (220) for the sample matrix based on said plurality of sample matrix data sets, the consensus library comprising a plurality of known-unidentified components for the sample matrix.

Embodiments of estimating unknown proportions of a plurality of end-members in an unknown mixture are provided herein. One embodiment of a method of estimating unknown proportions of a plurality of end-members in an unknown mixture comprises receiving fingerprint data of a plurality of end-members and an unknown mixture comprising unknown proportions of the plurality of end-members; processing the fingerprint data of the plurality of end-members and the unknown mixture to generate peak height data of the plurality of end-members and the unknown mixture; and generating an estimate of the unknown proportions of the plurality of end-members in the unknown mixture by applying a Markov Chain Monte Carlo method to the peak height data of the plurality of end-members and the unknown mixture.

Provided are an analytical method and apparatus using fingerprints on the basis of the types and expression levels of expressed trace proteins and/or peptides contained in living tissue and/or biological fluid. The present invention relates to a method and apparatus for analyzing the status of living tissue and/or biological fluid by binding a specific fluorogenic reagent (such as DAABD-Cl) to expressed trace proteins and/or peptides contained in living tissue and/or biological fluid without degradation treatment followed by precisely detecting and separating by nano-liquid chromatography, and subsequently continuously and quantitatively measuring the separated and purified fluorescent labelled proteins and/or peptides using a fluorescence detector. The use of a nano-liquid chromatograph having a fluorescence detector makes it possible to obtain profiles of expressed trace proteins and/or peptides contained in living tissue and/or biological fluid.

A method for identifying the adulteration of a pine bark extract or a peanut skin extract in a grape seed extract using HPLC fingerprint spectrums. The method includes 1) establishing HPLC fingerprint spectrums of the three extracts; 2) determining characteristic peaks of pine bark extract and peanut skin extract; 3) testing a grape seed extract sample using liquid chromatography detection to identify the adulteration of pine bark extract or peanut skin extract in the sample according to whether the chromatogram contains the characteristic peaks of pine bark extract and/or peanut skin extract, wherein the addition of more than 3% of adulterants can be accurately identified. The method has good stability and reproducibility, high efficiency, obvious identification characteristics, provides a theoretical basis for the identification of the plant sources of grape seed extracts, and is conducive to promoting the healthy development of the plant extract industry.

An analysis system includes a separation system that provides compounds to a sample cell of a spectrometric system. The system analyzes spectral information from the spectrometric system by optimizing retention windows for the compounds and identifies quantities of the compounds by comparing spectral information within and outside the respective retention windows.

Methods and systems to preserve, prepare, extract, and/or analyze hydrocarbons in the pore spaces of or adsorbed in organic-rich rock samples, such as, but not limited to, drill cuttings and drill cores, using one or more combinations of physical energy sources, including, but not limited to, thermal, vapor pressure, and mechanical stress. The collected samples are transported and prepared in low temperature conditions, with parts of subsequent processing at very low temperatures, thereby allowing a fuller measurement of geochemical fingerprints for the extracted hydrocarbons using various analysis tools. More particularly, the treatment and process allows geochemical fingerprinting to very low carbon number ranges.

A method for the identification of unknown compounds based on a novel Retention Index System comprising having a TAGs homologous series, wherein such identification is performed by means of liquid chromatography (LC), or liquid chromatography coupled with mass spectrometry (LC-MS) is disclosed.

A method for analysing a crude oil to determine the amount of organic acid compounds contained in the crude oil includes extracting the organic acid compounds from a sample of crude oil to form an extract and determining the amount of the extracted organic acids In addition, the method includes dissolving the extract in a polar solvent to form a solution of the extracted organic acid compounds Further, the method includes introducing a sample of the solution of the extracted organic acid to an apparatus including a reversed phase liquid chromatography (LC) column and a mass spectrometer (MS) arranged in series. The reversed phase LC column contains a hydrophobic sorbent and the mobile phase for the LC column includes a polar organic solvent. Still further, the method includes separating the organic acid compounds in the LC column of the LC-MS apparatus and continuously passing the separated organic acid compounds from the LC column to the MS of the LC-MS apparatus to ionize the organic acid compounds and to obtain a chromatogram with mass spectral data over time for the ionized organic acid compounds. Moreover, the method includes determining the area(s) under the peak(s) in an extracted ion chromatogram derived from the mass spectral data assigned to one or more organic acid compounds. The method also includes determining the amount of the organic acid compound(s) in the sample by comparing the area under the peak(s) assigned to the organic acid compound(s) with the area under a peak in an extracted ion chromatogram assigned to a specific amount of a standard organic acid compound. In addition, the method includes extrapolating from the amount of the organic acid compound(s) in the sample to provide the total amount of the organic acid compound(s) in the extract.

The present invention discloses a method for product quality control and fingerprint detection of an epimedium brevicornu complex. The method uses high performance liquid chromatography, and can effectively realize the quality control of products containing traditional Chinese medicine components, and especially stable control of the quality of products containing a large quantity of non-traditional Chinese medicine components in formulas. Through step-by-step quality control, product quality fluctuation is reduced and stable quality is ensured. Meanwhile, the method is simple and convenient, does not need additional instruments and standards, saves the cost and is more conducive to actual production.