3results about How to "Novel detection method" patented technology

The preparation method comprises the following steps: adding a phosphor salt and urea into a carbon source, uniformly stirring, dissolving in water, carrying out a hydrothermal reaction at 180-200 DEG C, carrying out a series of purification operations such as suction filtration, high-speed centrifugation and dialysis, and obtaining the fluorescent carbon dots. Completely evaporating the solvent to dryness, replacing the solvent with equivalent absolute ethyl alcohol, fully dissolving by ultrasound, and filtering by using an organic filter head; the method solves the problems that the existing curcumin content detection cost is relatively high, the detection and analysis index error of a fluorescence analysis method is obvious, and the pretreatment process is relatively tedious. According to the method, after the curcumin and the fluorescent carbon dots have a synergistic effect, the characteristic half-peak width of a fluorescence emission spectrum of the coexisting solution, namely the light color purity in the coexisting solution, is regularly changed, and the content of the curcumin which promotes the change of the light color composition of the coexisting solution is measured according to the numerical value change condition of the half-peak width; and a curcumin quantitative analysis technology taking the high-performance fluorescent carbon dots as a detection medium is realized.

This invention discloses a method for detecting 3-chloro-1,2-propanediol esters and 2-chloro-1,3-propanediol esters in aquatic oils using liquid chromatography-tandem mass spectrometry (LC-MS / MS). The method employs porcine pancreatic lipase to specifically enzymatically hydrolyze esterified contaminants in krill oil, releasing free 3-chloro-1,2-propanediol and 2-chloro-1,3-propanediol. Derivatization is then performed using quinalyl chloride as a derivatizing agent. Combined with LC-MS / MS technology, this achieves high sensitivity and specificity for detection and effectively distinguishes the chromatographic behavior of these two isomers. By using mild and highly specific enzymatic hydrolysis instead of harsh chemical hydrolysis, and combining it with LC-MS / MS detection, the destruction of target analytes and side reactions during pretreatment are effectively reduced. The optimized pretreatment process improves the stability, accuracy, and detection efficiency of the method in complex lipid matrices, providing a reliable analytical tool for risk assessment and quality control of chloropropanol ester contaminants in aquatic oils and related oil products.

The present invention discloses a wireless sensor monitoring network for underground monorail cranes, including a coordinator aggregation node, a data display processing device, and a plurality of brake block monitoring nodes, a tie rod stress monitoring node, a carriage vibration monitoring node, and a routing relay node; wherein the brake block monitoring node, the tie rod stress monitoring node, and the carriage vibration monitoring node are respectively connected to the routing relay node through a universal communication control module, the routing relay node is connected to the coordinator aggregation node through a universal communication control module, and the coordinator aggregation node is connected to the data display processing device through a universal communication control module. The present invention arranges nodes at various locations of the locomotive body to monitor the braking, vibration, and tie rod status of the monorail crane, make up for the monitoring loopholes of the electrical control system, and uploads the node monitoring data and the locomotive electrical control system data to the locomotive control room through the mine tunnel wireless communication base station, so as to realize real-time monitoring of the operation status of the monorail crane.