39 results about "Sudan Red G" patented technology

The invention discloses a method for simultaneous determination of a plurality of synthetic pigments in hot pot flavorings. The method comprises extraction, concentration, purification and detection of new red, amaranth, carmine, allura red, erythrosine, sunset yellow, acid red G, acid scarlet GR, Rhodamine B, Para Red, sudan I, sudan II, sudan III, sudan IV, sudan orange G, sudan red 7B and a plurality of other synthetic pigments. The method for simultaneous determination of a plurality of synthetic pigments in hot pot flavorings provided by the invention has the advantages of simple steps and high accuracy and precision.

The invention discloses a composite adsorbing material of a metal organic framework and cuprous salt and a preparation method and application thereof. The adsorbing material is compounded by the metal organic framework HKUST-1 and cuprous salt and is a brand-new composite adsorbing material, wherein the HKUST-1 has a very high specific surface area and can form physical adsorption with azobenzene dyes such as methyl orange, and the cuprous salt is attached to the surface of the KHUST-1 and is uniformly dispersed, so that the adsorption capacity of the material on organic dyes is favorably improved. The preparation method disclosed by the invention is simple and feasible and is easy to realize; and furthermore, the composite material can be widely applied to organic dyes for removing azobenzene, and particularly has good application prospects in the aspect of removing dyes, such as methyl orange, Sudan red, reactive black, methyl red and dimethyl yellow.

The invention discloses a the fat-soluble azo dye detection method and kit in the food or feed, which includes the following steps: (1) Preparation for the test solution: to be examined samples using organic solvent dilution, dissolved or extraction, as evidence test solution; (2) adding the test solution of excessive oxidant; (3) adding reducing agent to remove excess oxidizer, (4) static hierarchical, according to the color of organic layer judge whether the seized samples containing Sudan, and other fat-soluble azo dyes. The detection method of this invention is low cost, specific, sensitive and simple rapid, and does not require expensive equipment, and it can be used for the scene rapid detection of food or feed whether added illegal Sudan, and other fat-soluble azo dyes. At the same time it provides an apid screening test to see whether the food or feed contain Sudan or fat-soluble azo dyes illegally.

The invention discloses a method for simultaneously determining seven pigments in eggs, and belongs to the technical field of food safety detection. According to the method, a DQTP/Fe3O4 organic covalent skeleton structure and a magnetic nano composite material are adopted as a distributed magnetic solid-phase extraction adsorbent to extract pigments in eggs, and then an ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method is combined with an external standard method to determine the content of the pigments in the eggs. The invention discloses a method forsimultaneously determining contents of riboflavin, xanthophyll, canthaxanthin, Sudan red I, Sudan red II, Sudan red III and Sudan red IV pigments in eggs. Detection limits of xanthophyll, canthaxanthin, Sudan red I, Sudan red II, Sudan red III and Sudan red IV are 0.2 mu g/kg; the detection limit of riboflavin is 0.2 mu g/kg. The adding amount of the seven pigments is within the range of 2-10 mu g/kg, the recovery rate is 80.2-106.7%, and relative standard deviation RSD is 1.5-6.0%.

The invention discloses a method for detecting Sudan red I in an aqueous phase, fluorescence test paper and a preparation method and application of the fluorescence test paper. The detection method comprises the following steps: (1) preparing a fluorescence probe solution, wherein the fluorescence probe solution is an amphipathic chitosan derivative CMCs-g-PPDO/PFO nanocomposite fluorescence probe solution, and the micelle concentration is 0.5-2mg/mL; (2) adding the fluorescence probe solution into a cuvette, and arranging the cuvette in a fluorescence spectrophotometer for scanning a fluorescence spectrum; (3) adding a to-be-detected sample solution into the cuvette containing the fluorescence probe solution in the step (2), arranging the cuvette in the fluorescence spectrophotometer for scanning a fluorescence spectrum, identifying Sudan red I pigments according to the fluorescence quenching degree, if the fluorescence spectrum quenching is obvious, the sample contains the Sudan red I pigments, and if the fluorescence spectrum does not have an obvious change, the sample does not contain the Sudan red I pigments. Furthermore, functional fluorescence test paper is prepared. The fluorescence test paper has a good detection effect on Sudan red I.

The invention relates to an application of Sudan red for preparing an ammonium nitrate fuel oil explosive (ANFO), and an ANFO containing the Sudan red and a preparation method thereof. The invention can enable a field operator to visually ensure that the ANFO meeting the formula requirement into each blast hole through a color board, reduces the emission of toxic gas, improves the capacity for work of the explosive, obtains good blasting effect, and meets the requirement of green organization on least content of toxic gas generated after the explosive explodes.

The invention discloses Sudan red I molecularly-imprinted solid phase extraction padding. The Sudan red I molecularly-imprinted solid phase extraction padding refers to molecularly-imprinted polymer particles which is prepared in a way that Sudan red I is taken as a template molecule, acrylamide is taken as a function monomer, maleated rosin glycol acrylate is taken as a cross-linking agent, and azoisobutyronitrile is taken as an initiating agent. The solid phase extraction padding has a memory function on a three-dimensional structure of a molecule of the sudan red I, the specificity, the selective separation and the enrichment of the sudan red I are realized, the padding is filled so as to form a solid phase extraction column, and the solid phase extraction column is used for detecting the selective separation, purification and the enrichment of the Sudan red I in an extraction solution containing a sudan red I food sample; and the high sensitivity and high selectivity detection on the food sample containing the sudan red I is realized, and the method provided by the invention has the characteristics of being high in recovery ratio, small in relative standard deviation, simple and rapid to operate, high in efficiency and the like.

The invention relates to a water-based biodegradable penetrant and a preparation method thereof. The water-based biodegradable penetrant comprises food-grade carmine, a solvent, a stable neutralizer and a surfactant, the concentration of the food-grade carmine is 1.5-3.0 g/1000 ml, the concentration of the stable neutralizer is 8.0-12.0 g/1000 ml, the concentration of the surfactant is 1.0-1.5 g/1000 ml, and the solvent is water. According to the present invention, the design is reasonable, the food-grade carmine is adopted as the pigment to replace the existing Sudan red, the food-grade carmine is adopted as the food-grade pigment, such that the health and the environmental protection are provided while the water-based requirement is met, the food-grade carmine is dissolved in water to form the solution with the high color contrast, the process parameter requirement of the penetration detection is met, the sensitivity is high, and five artificial defects on the type 2 reference test block can be clearly displayed; the water-based biodegradable penetrant is low in toxicity, so that the health risk of operators can be reduced.

The invention discloses a standard sample of Sudan red in eggs and a preparation method of the standard sample. According to the preparation method, a mixed stock mother liquor containing the Sudan red I, the Sudan red II, the Sudan red III and the Sudan red IV is prepared firstly, then most of the egg liquid is added for dilution, the matrix matching property can be kept in the mode, and meanwhile the problem that the Sudan red is not dissolved in water and is not prone to being evenly dispersed in the egg liquid matrix is solved; and then drying is performed in a low-temperature spray drying and airflow crushing manner, so that the material is fluffy and is not easy to harden and block in the storage process, and the sample stability is better. According to the standard sample provided by the invention, commercially available eggs are directly adopted as raw materials, the raw materials are easy to obtain, other substances capable of changing matrix components are not introduced in the preparation process, the base material matching property of the standard sample and an actual tested sample is guaranteed to the maximum extent, and the standard sample is good in uniformity and stability, and can be used for measurement and calibration of food detection related instruments, instrument period check and method verification, measurement personnel examination and the like.

The invention discloses an electrochemical method for detecting Sudan red in food. The electrochemical method specifically comprises the following steps of: (1) preparing an expanded graphite paste electrode; (2) preparing a Sudan red standard solution; (3) drawing a standard curve, specifically, taking the expanded graphite paste electrode as a working electrode, a saturated calomel electrode as a reference electrode and a platinum wire electrode as a counter electrode to obtain a three-electrode system, then inserting the three-electrode system into the Sudan red standard solution, performing stirring for enriching, and performing scanning to obtain a linear regression equation, and drawing the standard curve; (4) preparing a liquid to be detected; and (5) performing detecting. The three-electrode system is simple in structure, wide in detection range and low in detection limit, can stably, quickly and accurately detect the content of the Sudan red in food, and can be repeatedly used for detecting the Sudan red.

The invention belongs to the field of extraction of natural products, and particularly relates to a method for removing various hazardous substances in capsorubin. The method comprises the following steps: dissolving capsorubin to be treated in an organic solvent, and separating hazardous substances through an organic solvent-resistant nanofiltration membrane, wherein the organic solvent is one or more selected from acetone, a vegetable oil extraction solvent and ethyl acetate. The method disclosed by the invention is simple in process and high in capsorubin yield, and a loss rate in the invention does not exceed 0.5% compared with a loss rate of a non-removal process. According to the method disclosed by the invention, multiple harmful components including benzopyrenes in capsorubin can be removed at the same time, and the content of benzopyrenes in capsorubin is reduced from dozens of ppb to less than 10 ppb; the concentrations of illegal dyes such as Sudan red and rhodamine B are decreased from dozens of to hundreds of ppb to 10 ppb or below; the concentrations of pesticide residues are decreased from dozens of ppm to 20 ppb or below; and thus, the quality requirement on high-end products is met, and safety is greatly improved.