155results about How to "Shorten the concentration time" patented technology

The present invention includes cement compositions and methods for using such cement compositions to coat pipe surfaces, particularly usefull for providing protection from hostile conditions that may otherwise lead to corrosion of the pipe surface. These cement compositions have improved mechanical properties including tensile strength, elasticity, and ductility.

The invention discloses a method for detecting aromatic amine in cigarette mainstream smoke by using a gas chromatography-tandem mass spectrometry. The method is characterized by comprising the following steps of: catching aromatic amine compounds in a particulate matter in the cigarette mainstream smoke by using a Cambridge filter; extracting by using hydrochloric acid solution, washing by usingdichloromethane, reducing by using sodium hydroxide and then extracting by using normal hexane, and performing derivatization by using pentafluoropropionic anhydride and trimethylamine hydrochloride;and concentrating and detecting by using the gas chromatography-tandem mass spectrometer (GC-MS/MS) so as to measure the content of the main aromatic amine compounds in the cigarette mainstream smoke. Compared with the conventional method for analyzing the aromatic amine in the cigarette mainstream smoke, the analysis and measurement method has the advantage of simplifying the pretreatment of a sample along with higher sensitivity, high experimental repetitiveness and recovery rate and applicability to analysis of a large batch of samples.

The invention relates to a method for preparing creatine hydrochloride, which belongs to a method for preparing guanidine or derivatives thereof, wherein, hydrochloric acid and creatine water are reacted at the temperature of 25-40 DEG C and then filtered; and after concentration, crystal separation, flushing by ethanol and drying, finished product creatine hydrochloride is obtained.

The invention relates to the field of pharmaceutical equipment, and particularly relates to a concentration system. An evaporation and concentration system comprises a climbing film evaporator, a condenser, a cooler, a microwave heater and a flash evaporator, wherein the microwave heater is connected with the climbing film evaporator; the climbing film evaporator is connected with the flash evaporator through a high pressure plunger pump; and the flash evaporator is connected with the condenser. Due to the adoption of the above technical solution, the microwave heater is used to heat an original solution in cooperation with a stirring device, so that operation time of heating the original solution is shortened, operation modes are more convenient and consume little energy. When the original solution is evaporated, the flash evaporator is used for two-effect evaporation, the evaporation effect is substantial, evaporation speed is faster than that of other evaporators, and condensation time of the whole condensation system is shortened.

An extracting method of blackberry pigment relates to a technique for producing natural blackberry pigment using fresh or frozen blackberry. The natural blackberry pigment has bright color, stable quality, rich nutrient and widely used in every field of food industry. Because the maturation period of the blackberry is centralized and the blackberry is not easy to store, the factory run is used to process the fresh blackberry into pigment powder during collection period; or the factory run is used to process the frozen blackberry into pigment powder during dead period of production. The preparation method comprises heating and softening the fresh or frozen blackberry, crushing, extracting, decompression concentrating, adjusting pH, diluting, centrifuging, purifying, decompression concentrating, drying and grinding. The invention provides a safe and effective method for extracting and purifying the blackberry pigment to obtain natural pigment with high purity, good chemical stability and strong water solubility.

The invention discloses a production process of poly-crystal rocky candy. The production process comprises the following six steps: by taking first-grade white sugar as a raw material, dissolving the sugar, micro-filtering and clarifying, desalting and decolorizing by using ion exchange resin, concentrating in vacuum, charging seeds for crystallization, drying and packaging to produce the poly-crystal rocky candy. The poly-crystal rocky candy produced by the method disclosed by the invention is sweet and delicious in taste and white and transparent in color and luster; no sodium hydrosulfite is added for color protection during the overall production, so the product is environmental friendly and safe; the crystallization rate of the rocky candy is above 95%; the problem of low crystallization rate during production of the poly-crystal rocky candy for a long time is solved.

A negative pressure magnetic stirring concentrator relates to a concentrator and aims at solving the problems that air leaks easily at a rotating shaft, the preparation cost is high when adopting a rotary evaporator to concentrate liquid, and high purity nitrogen is wasted, air is polluted when adopting a pressure blowing concentrator to concentrate liquid, etc. A vacuum chamber is fixedly connected with a lifting support through two retaining clips, internally provided with a condense water coiled tube and provided with a pumping hole connected with a vacuum pump thereof, the upper end of the vacuum chamber is provided with a reducing valve and the lower end thereof is provided with a solution recovering bottle, two ends of a connecting tube are communicated with the vacuum chamber and a concentrating bottle that is arranged at the bottom of a thermostat water bath, a bar magnet externally coated with polyfluortetraethylene is arranged in the concentrating bottle, an electric motor is fixedly arranged below the bottom of the thermostat water bath, and an output shaft of the electric motor is connected with the lower end surface of a long-strip magnet, the upper end surface of which is magnetically connected with the lower end surface of the bar magnet externally coated with polyfluortetraethylene. The concentrator has the advantages of good air tightness, low preparation cost, no need of consuming high purity nitrogen and light environment pollution.

The invention discloses a decoction concentrating device for decocting clinical Chinese medicaments, and belongs to the technical field of Chinese decoction concentration. The decoction concentrating device is characterized by comprising a decoction storage bucket and a reduced pressure concentration part, wherein the reduced pressure concentration part comprises a concentration bucket cover, a concentration bucket, upper and lower two concentration pans, an electromagnetic heater and a reducing valve; the upper and lower end faces of the concentration bucket cover are respectively connected with the decoction storage bucket and the concentration bucket; the decoction in the decoction storage bucket flows onto the inner surface of the lower concentration pan, which is in a curved-surface shape and of which the outer surface is provided with protrusions, through an outlet hole controlled by a check ball valve on the concentration bucket cover, and then flows into the concentration bucket; the electromagnetic heater is embedded on the bottom surface of the concentration bucket; the decoction in the concentration bucket can flow out through a liquid outlet pipe with an inclined surface; and the reducing valve is fixed on the outside of the upper part of the concentration bucket so as to reduce the internal pressure of the concentration bucket. The decoction concentrating device has the advantages of improving the decocting rate, reducing decocting amount and fully utilizing active ingredients of the decoction.

The invention discloses a preparation method of passiflora edulis fruit sauce. The preparation method comprises following steps: 1, passiflora edulis fruits are selected and washed; 2, peeling is carried out, wherein the epicarp of passiflora edulis fruits is removed via a mechanical method; 3, seeds are removed, wherein fruit peel and fruit pulp juice are collected respectively, and seeds in the fruit pulp juice are removed; 4, pulping is carried out, wherein the fruit pulp juice and fruit peel are subjected to pulping so as to obtain fruit pulp; 5, flavoring is carried out, wherein a sweetening agent and/or salt is added into the fruit pulp, and pH value of the fruit pulp is controlled to be 2.0 to 4.0 at the same time; 6, reduced pressure boiling and concentration are carried out, wherein boiling is carried out for 0.5 to 30min at 40 to 100 DEG C under a pressure less than one atmosphere so as to obtain the passiflora edulis fruit sauce. According to the preparation method, the hard passiflora edulis fruit epicarp which is acerb in taste and rough in mouthfeel is removed, the passiflora edulis fruit sauce is prepared from the mesocarp, the endocarp, and pulp which are abundant in nutrients, so that the obtained passiflora edulis fruit sauce is sweet, sour, and delicious, and is abundant in nutrients.

The invention discloses a method for rapidly detecting the content of tetrodotoxin in fish flesh through liquid chromatography-mass spectrometry. The method comprises (1) sample preprocessing and (2) chromatography-mass spectrometry detection. Diatomite is added in the preprocessing process against the effect problem of a matrix in a fish flesh sample and combining the chemical characteristics of tetrodotoxin, and the tetrodotoxin is separated from muscle tissues in an ultralow temperature freezing manner. A sample undergoes extraction by 1% acetic acid-methanol in a cell crasher at 60 DEG C, obtained extract is purified by a Carbon-GCB SPE small column, and the purified extract is directly introduced and analyzed, so the concentration time is saved. Compared with 0.2% acetic acid-water solution extraction, other SPE purification and ultrafiltration methods in the prior art, the method disclosed in the invention, adopting direct introduction and analysis of the sample, has the advantages of simplicity and low consumption in the processing process, good accuracy, convenience in operation, and good reappearance.

The invention discloses a method for quickly detecting the tetrodotoxin content in a fish liver employing a liquid-mass chromatography. The method comprises the steps of (1) sample pretreatment; and (2) chromatography-mass spectrometry detection. For the problem of a matrix effect in a fish liver sample, by combining the chemical characteristics of tetrodotoxin, kaolin is added during pretreatment, and the tetrodotoxin is separated to the maximum extent. Meanwhile, acidolysis is carried out at 60 DEG C, ultrasonic extraction is carried out by adopting a cell disruptor, and after Carbon-GCB SPE purification, a sample directly injected for analysis, so that the treatment process is simple, fast, low in consumption. The method is accurate, convenient to operate and good in reproducibility and can meet the technical requirements of fast detection of the tetrodotoxin in the fish liver.

The invention provides an extraction method of small molecular rhizoma polygonati polypeptide. The extraction method comprises the following steps: step 1, slicing rhizoma polygonati and adding purified water; uniformly stirring and decocting to obtain a decocted mixture; step 2, cooling the decocted mixture to 55 to 58 DEG C; adding cellulase, amylase and a saccharifying enzyme, and stirring andcarrying out enzymolysis to obtain a first enzymolysis solution; step 3, centrifuging the first enzymolysis solution and separating to obtain desugared rhizoma polygonati slices; adding purified waterinto the desugared rhizoma polygonati slices; raising the temperature to 50 to 55 DEG C and adding exoaspergillus oryzae neutral protease, fresh ginger protease and kiwi fruit protease; stirring andcarrying out enzymolysis to obtain a second enzymolysis solution; step 4, heating the second enzymolysis solution and raising the temperature to carry out enzyme inactivation; separating and purifyingto obtain the small molecular rhizoma polygonati polypeptide. The extraction method provided by the invention adopts a two-time enzymolysis method of a compound enzyme, and a centrifuging technologyand a nano-filtering technology are combined, so that a prepared rhizoma polygonati peptide product has high purity and the content of the peptide with a peptide molecular weight of 180 to 500 Daltonsreaches 99 percent or above.

The invention relates to a method of determining specific aromatic amine released by azodye in cigarette paper through bonded phase chromatography-tandem mass spectrometry, belonging to the technical field of physical and chemical inspection of residual harmful substances in paper. According to the method, the azodye is reduced to aromatic amine by using sodium hydrosulfite in a weak acidic buffer solution, then the aromatic amine is subjected to solid-phase, purification and nitrogen-blow concentration, afterwards a bonded phase chromatography-tandem mass spectrometry combination instrument is used for determination, and an internal standard method is used for fixing quantity. The method has the beneficial effects that the shortcomings of a sample treatment method in the prior art are overcome; a sample pretreatment method and instrument detection conditions are optimized according to paper samples; the disturbance of matters with similar structures to target objects can be reduced; and the method has the advantages of accurate operation, high recovery rate, short separation time, fastness, simplicity, convenience, high sensitivity and the like.