36results about How to "Meet the detection requirements" patented technology

The invention relates to a metagenome sample library construction method and an identification method based on a nanopore sequencing platform and a kit. The method comprises host removal pre-treatmentand sample library construction on human and animal metagenome samples by combining incomplete host removal based on the nanopore sequencing platform so as to sequence and identify the metagenomes. Compared with a conventional process flow, the method is simpler and rapider, meets the reasonable detection demands, omits flows such as library construction PCR in the identifying process, extrudes deviation caused by PCR amplification, and can be used for identifying metagenome microorganisms more truly and accurately.

The invention discloses an In2O3@ZnIn2S4 nanosheet material and a preparation method and application thereof. The method comprises the following steps: dissolving indium oxide in acidic water to obtain an indium oxide solution; and then adding zinc chloride, indium trichloride and thioacetamide into the indium oxide solution for a reaction; and carrying out washing and drying to obtain the In2O3@ZnIn2S4 nanosheet material, wherein a molar mass ratio of indium oxide to zinc chloride to indium trichloride to thioacetamide is 1: 2: 2: 5. The preparation method for the In2O3@ZnIn2S4 nanosheet material in the invention is simple and convenient in operation and low in cost; the prepared photocatalyst material, i.e., the In2O3@ZnIn2S4 nanosheet material, has extremely high targeting properties and degradation efficiency, and the degradation rate of 2,4-dichlorophenol in surface water can reach 93.2%; and the photocatalyst material can be recycled and still has high degradation rate after being used multiple times, so the treatment cost of 2,4-dichlorophenol is greatly reduced. Treatment with the photocatalyst material is efficient and energy-saving, and can meet national detection requirements on 2,4-dichlorophenol in surface water in China.

The invention discloses a chromium-doped titanium oxygen cluster nano catalytic material, a preparation method and applications thereof. The preparation method comprises the following steps: preparingtitanium oxygen cluster powder by taking pivalic acid as a precursor; and then adding the titanium oxygen cluster powder and chromium chloride into tetrabutyl titanate, carrying out ultrasonic dissolution, and reacting under a boiling condition to prepare the chromium-doped titanium oxygen cluster nano catalytic material, wherein a mass ratio of the titanium oxygen cluster powder to the chromiumchloride is (6-8):1. The chromium-doped composite titanium-oxygen cluster nano catalytic material prepared by the invention has the advantages of low technical cost, environmental friendliness, easiness in operation, high degradation efficiency and multiple types of degraded tetracycline, and overcomes the defects of poor quantum efficiency, poor visible light absorption efficiency, easiness in photo-induced charge combination and the like of the single-molecule photocatalyst. The titanium oxygen cluster compound has a large specific surface area, is easy to form a vacuum position under an illumination condition, has more pores and has high catalytic performance.

The invention discloses a dimethyl hydrazine adsorption material in automobile exhaust, and a preparation method and application thereof. The method specifically includes: mixing nitrogen ethylpyridinium nitrate, sodium sulfate and polyacrylamide-triethanolamine graft chelate gel in a mass ratio of 1:7:2, and burning the mixture to obtain an ionic liquid active adsorbent material, wherein the burning temperature is 120-150 DEG C. The method for preparing the adsorbent material has the advantages of rapid and convenient preparation, usage of the special ionic liquid, salt and graft chelate gelin preparation; and the prepared adsorbent material has high targeting property and collection efficiency, and has permeability of dimethyl hydrazine in automobile exhaust reaching 98.9%, wide linearrange, low detection limit and relatively small standard deviation, and can meet the national requirements for detection of dimethyl hydrazine in automobile exhaust.

The invention discloses a corn ochrarin absorbing material and preparation and application methods thereof. The preparation method of the corn ochrarin absorbing material comprises mixing and firing tetrabutyl ammonium chloride, sodium sulfate and polyacrylamide-tetraethylenepentamine grafted chelating gel, during which the firing temperature is 120-150 DEG C, and the weight ratio of tetrabutyl ammonium chloride, sodium sulfate and polyacrylamide-tetraethylenepentamine grafted chelating gel is 1:7:2. The preparation method of the corn ochrarin absorbing material is rapid and convenient and applies special ion solution, salt and the grafted chelating gel, so that the prepared corn ochrarin absorbing material can achieve high targeting property and capturing efficiency. The corn ochrarin absorbing material achieves a corn ochrarin permeating rate up to 99.2% and is wide in linear range and low in detection limit and relative standard deviation, and can meets the national requirements oncorn ochrarin.

The invention discloses a geological radar detection surface adapting device and method for tunnel advanced geological forecast. The geological radar detection surface adapting device comprises a carrying platform, a clamping mechanism, an adapting mechanism and a moving mechanism, a clamping mechanism and an adapting mechanism are arranged on one side of the carrying platform, and a moving mechanism is arranged on the other side of the carrying platform; the clamping mechanism comprises a clamping plate used for fixing a radar antenna, the adapting mechanism comprises an elastic part and an adapting mechanical wheel set, the elastic part and the adapting mechanical wheel set are connected with the clamping plate, and the elastic part is used for applying external force to the adapting mechanical wheel set so as to adjust the radar antenna to move along a measuring line by adjusting the position of the adapting mechanical wheel set. The adaptive mechanism of the combined structure of the spring and the adaptive mechanical wheel set is adopted to adjust the attachment of the radar antenna and the detection surface, so that the radar antenna moves along the detection line, thereby facilitating the receiving of signals, and being suitable for the detection of various types of geological radars such as tunnel faces, secondary linings and the like.

The invention discloses a milk dienestrol adsorption material and a preparation method and application thereof. The method includes: mixing 1-methyl-3-buthylimidazole chlorine salt, ammonium sulfate and polyacrylamide-ethanol amine grafted chelated gel, and burning at a temperature of 120-150 DEG C to obtain the adsorption material, wherein a mass ratio of 1-methyl-3-buthylimidazole chlorine saltto ammonium sulfate to polyacrylamide-ethanol amine grafted chelated gel is 1:7:2. The preparation method of the adsorption material is quick and convenient; by adoption of the special ionic liquid, salt and grafted chelated gel in preparation, the prepared adsorption material is high in targeting performance and collection efficiency. By adoption of the method, the recovery rate of dienestrol inmilk reaches 99.5%, wide linear range, low detection limit and low relative standard deviation are realized, and the national requirement on detection of dienestrol in milk can be met.

The invention discloses a rice cyhalothrin adsorption material and a preparation method and application thereof. The method includes: mixing 1-methyl-3-buthylimidazole bromide, dipotassium phosphate and polyacrylamide-diethylenetriamine grafted chelated gel, and burning at a temperature of 120-150 DEG C to obtain the adsorption material, wherein a mass ratio of 1-methyl-3-buthylimidazole bromide to dipotassium phosphate to polyacrylamide-diethylenetriamine grafted chelated gel is 1:8:1. The preparation method of the adsorption material is quick and convenient; by adoption of the special ionicliquid, salt and grafted chelated gel in preparation, the prepared coral-shaped ionic liquid activated adsorption material is high in targeting performance and collection efficiency. By adoption of the method, the adsorption rate of cyhalothrin in rice reaches 99.5%, wide linear range, low detection limit and low relative standard deviation are realized, and the national requirement on detection of cyhalothrin in rice can be met.

The invention discloses an adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and a preparation method and application of the adsorption material. The method includes the step that tetrabutylammonium bromide, sodium acetate and polyacrylamide-dimethylacetamide grafted chelated gel are mixed to prepare the adsorption material through a sol-gel method, wherein the reaction temperature is 150-170 DEG C, and a mass ratio of tetrabutylammonium bromide to sodium acetate to polyacrylamide-dimethylacetamide grafted chelated gel is 8:1:1. The preparation method of the adsorption material is quick and convenient; by adoption of special ionic liquid, salt and grafted chelated gel in preparation, the prepared triangular ionic liquid active adsorption material is high in targeting and collecting efficiency, and the recovery rate of 2,4-dichlorophenoxyacetic acid in wheat reaches 98.9%. In addition, the adsorption material is wide in linear range, low in detection limit and low in relative standard deviation, and the national detection requirement of 2,4-dichlorophenoxyacetic acid in wheat can be met.