3 results about "Organic arsenic" patented technology

This invention provides a method for preparing high-content krill phospholipids and removing organic arsenic using preparative high-performance liquid chromatography (HPLC). The method includes: S1, dissolving Antarctic krill oil; S2, separating Antarctic krill phospholipids and removing organic arsenic using preparative HPLC; and S3, concentrating the eluent to remove the solvent, obtaining Antarctic krill phospholipids with a total phospholipid content ≥60% and a total arsenic content <1 mg / kg. The chromatographic separation materials used in this invention are pure, and the solvents used are food-grade ethanol, n-hexane, etc., meeting food safety requirements. The process can be implemented using a fully automated preparative chromatography system, exhibiting good reproducibility. This method can obtain high-safety Antarctic krill phospholipid products with a total arsenic content of less than 1 mg / kg and a total phospholipid content ≥60%, ensuring that the total arsenic content of the product meets the safety limits for health food raw materials. This satisfies the needs of high-end application scenarios such as infant and pregnant women's nutritional products and is beneficial for developing functional Antarctic krill phospholipid products.

The application discloses a copper residue-based amorphous composite material, which is prepared by the following steps: crushing and screening dried copper residue, calcining the screened copper residue at 450-550 DEG C, mixing the calcined copper residue, manganese salt and water, adding potassium permanganate solution into the mixture, uniformly mixing the mixture, heating the mixture in a water bath at 45-55 DEG C, and separating the reaction product into solid and liquid, and then washing, drying and grinding the solid to obtain the copper residue-based amorphous composite material; the material has the advantages of high specific surface area, many reaction active sites, good oxidation and adsorption performance, high metal atom utilization rate and stable structure, and can be widely applied to oxidizing and adsorbing organic arsenic; and the adsorption removal effect is good; and the application realizes resource utilization of solid waste and has great application prospect in the field of environment.

This invention provides a standard quality control sample for edible fungi matrix containing multiple arsenic forms, its preparation method, and its application, relating to the field of standard material technology. The invention involves preparing a powder from dried edible fungi samples (containing monomethylarsenic acid, dimethylarsenic acid, arsenic betaine, and arsenite) to obtain a powder sample. An aqueous solution of arsenate is added to the powder sample, and the resulting wet powder sample is then sequentially dried, pulverized, and mixed to obtain a standard quality control sample for edible fungi matrix containing multiple arsenic forms. This invention uses dried edible fungi samples as raw materials, and the prepared edible fungi matrix standard quality control sample is easy to preserve stably, and temporary sampling is less likely to induce arsenic form conversion. The method of this invention is simple, and the prepared edible fungi matrix standard quality control sample exhibits good uniformity and excellent stability. It can be used for the accurate quantification of inorganic arsenic in edible fungi, and through the qualitative determination of organic arsenic, it can effectively prevent false positives in inorganic arsenic results, effectively improving the accuracy and reliability of the detection results.