185results about How to "Improve elution" patented technology

Disclosed herein are drug delivery devices and methods for the treatment of ocular disorders requiring targeted and controlled administration of a drug to an interior portion of the eye for reduction or prevention of symptoms of the disorder. The devices are capable of controlled release of one or more drugs and may also include structures which allows for treatment of increased intraocular pressure by permitting aqueous humor to flow out of the anterior chamber of the eye through the device.

The invention discloses an efficient acidic oil sludge decomposing agent, comprising the following component materials in percentages by weight: 1-15% of oxidant, 1-10% of coprecipitator, 5-30% of flocculating agent, 1-10% of surfactant, 0.5-10% of emulsion breaker, 1-10% of acidity regulator and 50-90% of water. The invention further discloses a preparation method of the efficient acidic oil sludge decomposing agent. The preparation method comprises the following steps of: 1, preparing sodium carboxymethylcellulose hydrosol; 2, dissolving all kinds of component materials; and 3, adding the sodium carboxymethylcellulose hydrosol prepared in the first step into the solution obtained in the second step so as to obtain the efficient acidic oil sludge decomposing agent. The invention further discloses application of the efficient acidic oil sludge decomposing agent. The efficient acidic oil sludge decomposing agent disclosed by the invention has the advantages of simple preparation process, low cost and easy industrialization; by means of chemical reaction, surface activation action, flocculation and salting-out emulsion breaking actions, the viscosity of the oil sludge is reduced, the oil phase, the water phase and the sludge phase are effectively separated, and the efficient acidic oil sludge decomposing agent can be used for recovering the crude oil from the oil sludge and quickly treating the petroleum pollution soil.

A device and method for extracting micro-plastic in settlings are provided. The device includes a filter drum, a liquid storage tank, a motor, a pedestal, a screen sieve and a transmission shaft. The filter drum is mounted in the liquid storage tank. The upper port of the filter drum is provided with the screen sieve. The liquid storage tank and the motor are mounted on the pedestal. The bottom of the liquid storage tank is provided with a drainage hole communicated with the filter drum. The motor is connected to one end of the transmission shaft through a rotating shaft, and the other end of the transmission shaft passes through the drainage hole and is connected to the bottom of the filter drum. The device and the method are advantageous in that (1) dispersion effects of muddy settlings and elution effects of a sample are obviously improved; (2) the recovery rate of the sample is increased, (3) the extraction efficiency is greatly increased, (4) extraction time is shortened and (5) labor is saved.

The invention relates to a method for recovering anion exchange resin polluted by organic matters and a recovery medicine, and aims to solve the problems that an elution effect is poor in the conventional recovery method and the conventional recovery medicine cannot increase the number of strong alkali groups when the anion exchange resin is severely polluted by the organic matters or macromolecular linear organic matters are tightly wound in the anion exchange resin. The method for recovering the anion exchange resin polluted by the organic matters comprises the following steps of: 1, transforming the anion resin; 2, flushing; 3, removing the organic matters from the anion resin to recover the anion resin; 4, flushing; and 5, regenerating. The recovery medicine used in the method for recovering the anion exchange resin polluted by the organic matters consists of NaCl, NaOH, an organic aid and water. The method is suitable for recovering the anion resin polluted by the organic matters and removing the organic matters from cation resin.

The invention discloses a method for determining the content of saffron in a medicinal composition, and aims to solve the problem that the content of saffron in a complex medicinal composition is difficult to determine. According to the method, methanol-acetonitrile-0.05mol/L ammonium acetate in a volume ratio of (30-45):5:(50-65) is adopted as a mobile phase, and a high performance liquid chromatography is adopted for determination; the mobile phase is a multi-solvent system, the mobile phase system is kept to be stable by adopting buffer salt, and the elution power is reinforced. The method provided by the invention is stable in determination result and good in linearity, the correlation coefficient, the resolution and the number of theoretical plates can meet the requirement of measurement standard, and a good detection result can be obtained on the saffron in a medicinal composition with a complex prescription.

The invention belongs to the technical field of polluted soil restoration and discloses a mixed eluant for synchronously removing polychlorinated biphenyl and heavy metals in soil and its preparation method and use. The mixed eluant is prepared by dissolution of active ingredients of saponin and Tween 80 in water. The mixed eluant is used for restoration of soil polluted by polychlorinated biphenyl and heavy metals. In use, the soil polluted by polychlorinated biphenyl and heavy metals is taken, and the polluted soil is mixed with the eluant and is eluted so that restoration of soil polluted by polychlorinated biphenyl and heavy metals is realized. The mixed eluant has a wide raw material source, has a low price, is environmentally friendly, has good elution effects and high elution efficiency and has a multi-ingredient polluted soil elution rate of 80% or more.

The invention discloses a method for simultaneously detecting multiple types of persistent organic pollutants in a water body. The persistent organic pollutants comprise polychlorinated biphenyl, polybrominated diphenyl ethers and polycyclic aromatic hydrocarbon. The method comprises the following steps: (1) sample pre-treatment is conducted, specifically, a to-be-detected water sample is taken to be filtered, standard substitutions and internal standard substances of the persistent organic pollutants are added to be evenly mixed, and a pretreated water sample is obtained; (2) solid-phase extraction is conducted, specifically, the pretreated water sample is guided into a solid-phase extraction column to be subjected to solid-phase extraction, and the solid-phase extraction column is driedand eluted through eluents, namely n-hexane and acetone; (3) purification is conducted, specifically, dried eluate is purified through a Florisil column; (4) gas chromatography-mass spectrometry combined detection is conducted; and (5) the content of the persistent organic pollutants is calculated. By selecting the appropriate eluents and adopting a triple quadrupole gas chromatography-mass spectrometry combined instrument, the polychlorinated biphenyl, the poly brominated diphenyl ethers and the polycyclic aromatic hydrocarbon are simultaneously detected, the detection limits are all low, and the method has great significance in the field of persistent organic pollutant detection.

The invention provides a detection method for dezocine related substances. Octadecyl silane bonded silica gel is adopted as a chromatographic column of a filling agent, and an acetonitrile-triethylamine solution is adopted as a mobile phase, wherein the acetonitrile-triethylamine solution is obtained by taking 1000 ml of water, adding 5 ml of triethylamine and 2 ml of a tetrabutyl ammonium hydroxide water solution, and adjusting pH to 3.2 through diluted phosphoric acid (1-5), and the ratio of acetonitrile to triethylamine is 200:800; the flow rate is 0.6 ml per min, and the detection wavelength is 281 nanometers. According to the detection method for dezocine related substances, the concentration of buffer salts is increased, elution is enhanced, an ion-pairing agent is added, the peak shape is improved, and the problems that due to the fact that the number of theoretical plates of an original method is small and a main peak cannot be rapidly eluted, the peak width is large and trailing is serious are solved.

The invention relates to a cigarette filter with a smoke odor selection function. The cigarette filter consists of a cavity-containing mouth stick and a perfuming thread/rod-containing mouth stick, which are mutually connected, wherein the cavity-containing mouth stick is formed by forming a cavity in a filter stick, and the perfuming thread/rod-containing mouth stick is formed by adding at least two perfuming thread/rods into another filter stick; a layer of hard forming paper wraps the part of the perfuming thread/rod-containing mouth stick, so that the perfuming thread/rod-containing mouth stick and the cavity-containing mouth stick are controlled to be connected during rotation so as not to be separated from each other. By the adoption of the cigarette filter, a consumer can enable the cavity to be aligned with the perfuming threads/rods through rotating the perfuming thread/rod-containing mouth stick, so that the elution function of smoke to specific odor ingredients is improved, and the content of some odor ingredient in smoke is increased to achieve the smoke odor selection purpose. Meanwhile, owing to the unique appearance, various filters with different appearances can be formed by combination, the recognition degree of the filters and the product differentiation are improved.

The invention belongs to pollutant treatment methods in the field of environmental protection and particularly relates to a treatment method of cyanogen-containing tailing slurry. The method comprisesthe steps of positive pressure filtration, water washing, blowing-off, filtrate treatment and the like, and an integrated treatment process is formed. The method provided by the invention has the advantages that the defects of low elution efficiency, large water consumption and the like existing in traditional stirring and elution processes can be overcome, cyanides and valuable metals in the cyanogen-containing tailing slurry can be eluted and treated, harmless treatment of the cyanogen-containing tailing slurry can be realized, recovery of cyanogen and valuable metal elements in the tailingslurry can be realized, full utilization of water resources can be realized, and the method has the characteristics of high elution efficiency, low water consumption, good elution effect and broad application prospect.

The invention relates to a washing desalination system and method for waste incineration fly ash or kiln dust. The invention aims at providing the washing desalination system and method with multiplegrading manners, good desalination effect and low cost. The washing desalination system comprises a conveying system and multiple stages of elution systems, wherein the elution systems include a first-stage elution system, a second-stage elution system and a multi-stage elution system; the content of chlorine salt in to-be-processed fly ash or kiln dust is more than or equal to 4% and less than orequal to 10%, and the first-stage elution system is adopted when the chlorine content is more than or equal to 2% and less than or equal to 5%; the content of chlorine salt in to-be-processed fly ashor kiln dust is more than or equal to 10% and less than or equal to 20%, and the first-stage elution system and the second-stage elution system are sequentially adopted when the chlorine content is more than or equal to 5% and less than or equal to 10%; and the content of chlorine salt in to-be-processed fly ash or kiln dust is more than or equal to 20%, and the first-stage elution system, the second-stage elution system and the multi-stage elution system are sequentially adopted when the chlorine content is more than or equal to 10%.