9 results about "Chemical marker" patented technology

The application discloses an evaluation method for distinguishing different quality of momordica grosvenori of different origins. The application adopts high performance liquid chromatography to establish the fingerprint of momordica grosvenori, carries out gradient elution by taking water-acetonitrile as a mobile phase, and detects the wavelength of 203 nm to obtain the HPLC fingerprint of momordica grosvenori; the obtained chromatogram is introduced into a traditional Chinese medicine chromatographic fingerprint similarity evaluation system to generate a control fingerprint, different origins of momordica grosvenori are distinguished through similarity comparison and / or chemical pattern recognition analysis; and chemical markers with VIP>1 such as 5-hydroxymethyl furfural, momordica grosvenori flavonoid, momordica grosvenori saponin V and momordica grosvenori saponin IIIA2 are screened. The application can effectively distinguish two main origins of green skin fruit and red hair fruit, overcomes the defects that traditional trait identification is subjective and it is difficult to distinguish similar appearance samples, and provides an objective, accurate and stable technical means for origin identification, quality consistency evaluation and authenticity identification of momordica grosvenori.

The present invention provides a method for determining the authenticity of a petroleum hydrocarbon allegedly comprising at least one specific chemical marker, as well as a method for determining adulteration of a petroleum hydrocarbon marked with at least one specific chemical marker. The methods claimed and described herein rely upon the use of specific chemical markers in combination with laser ionization at a wavelength of between about 300 nm and about 370 nm coupled with ion mobility spectrometry or with mass spectrometry.

The invention belongs to the technical field of traditional Chinese medicinal material fingerprint spectrum and primitive identification, and particularly relates to a construction method of flos magnoliae fingerprint spectrum and a primitive identification method. According to the method, volatile oil in flos magnoliae is taken as a detection object, and a stable and repeated gas phase detection means is firstly established and can be used for constructing a fingerprint spectrum of the flos magnoliae. Further, in combination with a multi-dimensional chemical pattern recognition technology (systematic clustering analysis / HCA, principal component analysis / PCA, partial least squares-discriminant analysis / OPLS-DA and VIP analysis), it is confirmed that myrcene and camphor in the atlas can be used as chemical markers for primitive identification. The method is simple and easy to operate, and has important significance for improving the quality control of the magnolia flower medicinal material.

To provide a landmine detection system and a landmine detection method that can improve the accuracy of detecting landmines that are placed on the ground and have metals containing iron on the outer surface, while reducing the risk of injury to an explorer, and can efficiently detect the landmines. [Solution] The mine detection system 1 comprises a first drone device 2 having a first drone 6, a first tank, and a first spraying device 10 that sprays an acidic first solution 52 that dissolves iron on the outer surface of the mine; a second drone device 4 having a second drone 20, a second tank, and a second spraying device 22 that sprays a second solution 54 that functions as a chemical marker that reacts to the iron ions dissolved by the first solution; and a third drone device 40 having a third drone 42 and a camera that captures images or videos of the reaction between the second solution and the iron ions.

The invention relates to a method and a corresponding system capable of verifying whether genuine SERS or SERRS chemical markers, which have a unique characteristic surface enhancement scattering feature, are present in a machine-readable mark applied to a valuable document by using a Raman spectrometer adapted to perform Raman spectroscopy analysis of the mark. The method according to the invention allows for rapid and reliable detection of the presence of SERS / SERRS chemical markers and is particularly suitable for verifying the authenticity of valuable documents, such as banknotes, by moving relative to the Raman spectrometer at a given speed, and possibly at a high speed, or by briefly exposing the Raman spectrometer.

According to the UPLC fingerprint spectrum detection method for the stone-eliminating and gallbladder-benefiting traditional Chinese medicine composition, a chemical mode recognition method is combined, 12 common peaks are calibrated in total, 8 common peaks are identified through a chemical reference substance, the similarity of 15 batches of stone-eliminating and gallbladder-benefiting traditional Chinese medicine composition fingerprints is 0.932 or above, and through analysis of HCA, PCA, OPLS-DA and the like and verification of a neural network model, the similarity of the fingerprint spectrums of the stone-eliminating and gallbladder-benefiting traditional Chinese medicine composition fingerprints is determined. 15 batches of stone-eliminating and gallbladder-benefiting traditional Chinese medicine composition samples are divided into 3 classes, and 7 main chemical markers which may cause mass difference are screened out, namely chromatographic peaks 2 and 6 (baicalin), chromatographic peaks 4, chromatographic peaks 8, chromatographic peaks 7, chromatographic peaks 9 (rhein) and chromatographic peaks 5 (hesperidin). The fingerprint detection method has the advantages of simplicity, feasibility, short detection time (about 25 minutes), good stability and good repeatability, can evaluate the inherent quality of the stone-eliminating and gallbladder-benefiting traditional Chinese medicine composition, further guarantees the stability of the inherent quality of the product, and provides a reference basis.

The invention discloses a method for detecting euonymus alatus based on thin-layer chromatography. According to the method, stigmas-4-ene-3-ketone is selected as a characteristic chemical marker, and a thin-layer chromatography identification system with toluene-ethyl acetate-formic acid (20: 1: 0.5) as a developing system is established. According to the method, consistent fluorescence quenching spots can be clearly detected on a silica gel GF254 thin-layer plate under an ultraviolet lamp (254nm) at a position (Rf value is 0.48 + / -0.03) corresponding to a reference substance. In addition, the invention further provides an efficient preparation process of the reference substance and a detection kit containing the key components, and the technical bottleneck that euonymus alatus medicinal materials and decoction pieces lack quality control of standardization, high specificity and good reproducibility for a long time is effectively solved.