6 results about "Dithizone" patented technology

The invention relates to the technical field of production of electronic chemicals, and discloses an electronic grade sulfuric acid deep impurity removal production process based on dynamic cycle adsorption, which comprises the following steps: preparing an adsorbent, providing mesoporous silica gel loaded with dithizone-phosphonic acid difunctional groups as the adsorbent, the pore size of the mesoporous silica gel being 10-50nm, and the specific surface area being greater than 500m / g; the method comprises the following steps: constructing a system, namely establishing a double-adsorption-column dynamic circulating system, dividing the interior of an adsorption column into a saturated region, a mass transfer region and an unpolluted region, and controlling an electronic-grade sulfuric acid solution to continuously flow at a constant flow speed at 30-45 DEG C through a programmable logic controller (PLC); and adsorption operation. According to the invention, the dithizone-phosphonic acid bifunctional group accurately captures metal cation impurities in electronic-grade sulfuric acid through the strong coordination ability of sulfur atoms and transition metal ions, and a double-site synergistic adsorption mechanism is formed.

A rapid, field-deployable method and associated kit for the qualitative detection of zinc fortification in wheat flour are disclosed. ፐከ6 method includes treating a wheat flour sample suspected of containing added zinc with a chromogenic reagent comprising dithizone dissolved in an ethanol solvent to induce a visually discernible color change from a blue profile to a pink-purple or red profile. The assay can be performed 85 8 surface spot test or as ል testtube liquid assay, the latter utilizing an aqueous buffer solution maintained at a pH of 5.5 to 6.0 to mobilize zinc ions. The resulting color change is evaluated against an intentionally fortified wheat flour standard. When validated against an Inductively Coupled Plasma Mass Spectrometry (ICP-MS) reference standard, the assay exhibits a sensitivity of 96.5%, a specificity of 90.9%, an overall misclassification rate of 5.88%, and 8 Cohen's kappa coefficient (k) of 0.88.

The invention discloses a preparation method and application of a high-stability hydrogen sulfide detection card, and the preparation method at least comprises the following steps: step I, dispersing dithizone in ethanol to obtain a dithizone solution; iI, dissolving lead acetate in water to obtain a lead acetate solution; iII, under the alkaline condition, mixing the dithizone solution obtained in the step I with the lead acetate solution obtained in the step II to obtain a dithizone-Pb complex; step IV, mixing the methanol solution containing tetrabutyl ammonium hydroxide, N, N-dimethylformamide, water and ethanol, and carrying out water bath reaction to obtain an alkaline silica gel solid carrier; v, dispersing the dithizone-Pb complex obtained in the step III into the alkaline silica gel solid carrier obtained in the step IV to obtain a dithizone-Pb complex solid carrier; and step VI, dispensing the dithizone-Pb complex solid carrier obtained in the step V on a thin film to obtain the hydrogen sulfide detection card. The detection card can be used for quantitative detection of hydrogen sulfide and drug sensitivity analysis of bacteria.

The application discloses a high-efficiency wastewater mercury removal agent and a preparation method thereof, belongs to the field of wastewater mercury removal, and comprises 20-50 parts of inorganic particles, wherein the inorganic particles are at least one of bentonite, zeolite or molecular sieve, the surface of the inorganic particles is chemically modified by using 1-5 parts of a silane coupling agent, and then the surface is adsorbed by 1-10 parts of an organic thioamide reagent; the bentonite is calcium-based bentonite or sodium-based bentonite with a blue absorption capacity of 40-50 g / 100 g and an expansion ratio of 20-40, the zeolite is clinoptilolite or mordenite, and the molecular sieve is 3A or 4A molecular sieve; the silane coupling agent is at least one of gamma-aminopropyl triethoxysilane, gamma-glycidyl ether oxygen propyl trimethoxysilane, methacryloyl trimethoxysilane, 2-(3,4-epoxy cyclohexyl) ethyl trimethoxysilane and 3-mercapto propyl trimethoxysilane; and the organic thioamide reagent is one or both of thiosemicarbazide and dithizone.

The present application belongs to the technical field of waste mineral oil recycling and regeneration, and particularly relates to a refining and regeneration method of waste lubricating oil; aiming at the problems of complex composition, containing various additives, metal debris, degradation products and the like of the current waste lubricating oil; the present application adopts molecular recognition-plasma-supercritical coupling technology, first carries out magnetic separation and vibration membrane filtration on the waste lubricating oil, then selectively adsorbs and removes various heavy metal ions through the molecularly imprinted polymer microspheres prepared by using the chemically modified dithizone as a functional monomer; utilizes low-temperature plasma treatment to deeply remove chlorine, silicon and phosphorus elements, and carries out supercritical CO2 treatment to realize preliminary separation of these impurities and base oil molecules, and through the catalyst MoP / TiO2-SiO2-OTS, catalytic cracking and alkylation reactions are realized to degrade the impurities into hydrocarbon fragments, and deep purification and recycling are realized.

The invention belongs to the field of aqueous zinc ion energy storage devices, and particularly relates to a zinc anode based on an organic molecule adsorption layer and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly coating the surface of a zinc electrode with an organic molecule solution, and carrying out vacuum drying to obtain the zinc anode; the organic molecules are any one or more of dithizone, terephthalonitrile, dimethylglyoxime and phenanthroline. Organic molecules are strongly adsorbed on the surface of a zinc anode through functional groups of the organic molecules, interface modification is performed by establishing a protective layer between a zinc cathode and electrolyte, uniform nucleation sites are provided, zinc ions are guided to be uniformly deposited, dendritic crystal formation is avoided, and therefore the purpose of inhibiting zinc dendritic crystal growth is achieved.