A method for establishing fingerprint of traditional Chinese medicine compound or its preparation with improving cognition is disclosed. By weight, the traditional Chinese medicine compound is made from following raw materials: 1-20 parts of Gastrodiae Rhizoma, 1-15 parts of Polygala tenuifolia, 1-30 parts of Acorus tatarinowii, 0.1-10 parts of Cistanche deserticola Ma, 0.1-10 parts of Rehmanniae Radix Praeparata, and 0.01-1 parts of curcumin. A chromatogram of a test sample solution is established by high performance liquid chromatography. Chromatographic conditions are as follows: a chromatographic column is octadecyl silane bonded silica gel chromatographic column. A column temperature is 25˜35 ° C. A flow rate is 0.9˜ 1.1 ml/min. Detection wavelengths are 210˜230 nm and 310˜330 nm respectively. A mobile phase A is acetonitrile and a mobile phase B is water. And gradient elution is carried out.

A particle detection device is provided. The particle detection device may include a substrate and at least one detection unit setting on the substrate. The at least one detection unit may include: a detection pool, configured to accommodate a sample liquid; a sample injection part communicating the detection pool, the sample injection part being sealable with a liquid driving device, wherein the liquid driving device and the sample injection part cooperate to enable the sample liquid to get in and out of the detection pool

Methods for performing multiple omics analysis in parallel are provided, the methods can include: dividing the mixture of cells or cell components into at least a first portion and a second portion; performing a first analysis on the first portion to acquire a first set of analytical data; performing a second analysis on the second portion to acquire a second set of analytical data. Methods for forming mixtures of analytes into first and second portions are also provided. The methods can include aligning the first and second plates to engage the first exposed surface with the second exposed surface, wherein the engaging is sufficient to convey at least some of the first analytes into the second solution to form a second mixture of the first analytes.

A method for quantitatively analyzing 11 amide alkaloids in tobacco leaves using gas chromatography-tandem mass spectrometry, comprises: soaking with a sodium hydroxide solution so as to free amide alkaloids from a tobacco powder sample matrix, transferring target compounds into an ether layer through extraction with methyl tertiary butyl ether, concentrating methyl tertiary butyl ether extraction liquids for analysis with gas chromatography-tandem mass spectrometry, inputting chromatographic peak areas obtained by an instrument into standard calibration curve fitting equations of the corresponding amide alkaloids to obtain the concentrations of the corresponding target compounds, and converting the concentrations to obtain the contents of the corresponding amide alkaloids in the tobacco leaves. The method can quantitatively analyze the 11 amide alkaloids at the same time, and has the advantages of simpleness, rapidness, stability and the like.

A method of detecting a seizure includes collecting volatile organic compounds with a collector material of a collector; separating a mixture of the volatile organic compounds into its constituent chemicals with a gas chromatography column; ionizing the constituent chemicals to create ionized chemicals and detecting the ionized chemicals; and analyzing the ionized chemicals to identify seizure-indicative volatile organic compounds.

The disclosure provides a method for analyzing compounds extracted from Cannabis. The method comprises extracting cannabinoids or terpenes from a sample using a C.sub.1-C.sub.4 alcohol or C.sub.5-C.sub.8 solvent as an extraction solvent to produce a supernatant, drying the supernatant to produce a dried extract, and dissolving the dried extract in a second C.sub.1-C.sub.4 alcohol or C.sub.5-C.sub.8 solvent, separating the cannabinoids or terpenes by gas chromatography using a capillary column with hydrogen as a carrier gas; and detecting the cannabinoids or terpenes using a mass spectrometer. The disclosure also provides a method of determining an effect of one or more Cannabis-derived compounds on intracellular calcium concentration in a cell using a microfluidic device.

In various aspects, the present disclosure pertains to methods of performing a sample enrichment procedure, which comprise: adding a sample fluid that comprises at least one phospholipid and at least one target analyte to a sorbent that comprises a hydrophobic component and a cation exchange component, thereby resulting in sorbent with bound phospholipid and bound target analyte; adding an aqueous solution comprising an acidic compound and a salt; adding an organic solution to the sorbent thereby desorbing at least a portion of the bound phospholipid from the sorbent; and adding an elution solution to the sorbent, thereby desorbing at least a portion of the bound target analyte from the sorbent and forming a solution of the target analyte in the elution solution. In other aspects, the present disclosure pertains to kits, which may be used in conjunction with such methods.

A device for analyzing a gaseous sample including a first housing including a detection assembly housed in the housing including a preconcentrator, a chromatography column and a detector intended to detect the presence of the separated compounds, a sampling assembly including a cartridge that is removable relative to the first housing, a control and processing unit housed in the housing and configured to execute an analysis operating mode capable of generating a first command for the detection assembly to analyze a first gaseous sample, a second command to determine the exceeding of at least one alert threshold and, if an alert threshold is exceeded, a third command for the sampling assembly to take a second gaseous sample.

A wearable health monitoring device includes a band configured to attach the wearable health monitoring device to a user's body; a VOC detection device configured to collect and analyze volatile organic compounds given off from the user's skin to identify specific health-indicative volatile organic compounds indicative of a health condition; and a biomarker sensor configured to detect a biomarker of the user.

A diffusive sampling device is used for quantitative measurement of chemicals in indoor and outdoor air. The sampling device includes a vial containing a sorbent on the inside bottom of the vial. The sampling device can be thermally vacuum cleaned before transport to the sampling location, and the sorbent can be chosen to allow the collection of either volatile or semi-volatile compounds (VOCs or SVOCs). After a diffusive sampling period (1 hour to 1 month), the vial is closed, and the collected sample is transferred to a laboratory for analysis. Using a thermal vacuum extraction focusing technique, the collected sample is rapidly delivered to a GCMS-compatible preconcentration device including a second sorbent for either split or splitless injection into a capillary based GCMS. No solvents are used during sampler preparation or analysis, and detection limits needed for monitoring of ambient or indoor air can be achieved for thousands of chemicals.