Application cases of nitrogen blowing instrument (sample concentration instrument) in various industries

Nitrogen blowing instrument is widely used in agricultural residue analysis, environment, biological products, food, pharmaceutical and other industries because it can quickly blow nitrogen into the surface of heated samples for sample concentration in the sample preparation test of liquid phase, gas phase and mass spectrum analysis, which is time-saving, easy to operate and easy to control It provides a time-saving platform for the preparation and processing of samples in gas chromatography (GC), liquid chromatography (HPLC) and other analytical methods, and is the supporting equipment of SPE solid-phase extraction technology The working principle of nitrogen blowing instrument is that the solvent in the sample can evaporate rapidly by blowing nitrogen into the sample, strengthening the air flow around and increasing the temperature Nitrogen is a kind of inert gas, which can insulate air and prevent oxidation Nitrogen blowing instrument uses the rapid flow of nitrogen to break the gas-liquid balance over the liquid, so as to speed up the evaporation of the liquid; and through dry heating or water bath heating to increase the temperature (the boiling point of the target substance is generally higher than that of the solvent), so as to achieve the goal of oxygen free concentration of the sample and keep the sample purer It is used in combination with SPE and GC to separate and detect various experimental samples Agricultural residue analysis: agricultural products such as vegetables, fruits and grains are sprayed with pesticides to resist pests in the process of planting It is inevitable that there will be pesticide residues in the process of eating The ingestion or long-term exposure to pesticide residues will cause acute or chronic poisoning to people, animals and other organisms In the analysis of agricultural residues, the nitrogen blowing instrument mainly increases the concentration of components by reducing the solvent or water in the sample solution, so that the samples for determination can reach the concentration that the instrument can detect Biological analysis: the application of nitrogen blowing instrument in biological analysis takes the detection of serum, plasma, blood and urine as an example They are an important part of the human body, so that the metabolism of the human body maintains a balanced state and normal operation Through the clinical detection and analysis of serum, plasma, blood and urine, it is conducive to the cause analysis Food and beverage: how to monitor the quality of daily drinks, such as milk, wine and beverage? In the past few years, melamine milk powder poisoning and industrial alcohol exceeding the standard in liquor often happened The juice, coke and other drinks sold on the market are harmful to human body Nowadays, food safety issues have attracted great attention, and the relevant departments are more and more strict in the detection of food and beverage Environmental analysis: nitrogen blowers are also widely used in environmental monitoring, such as drinking water, groundwater and polluted water sample detection and analysis Nowadays, with the rapid development of industry, groundwater and applied water are polluted to a large extent In the water quality detection, nitrogen blowing instrument heats and crystallizes the water quality, and detects and analyzes the impurities in the water by gas chromatograph Pharmaceutical inspection: pharmacopoeia is a national code for recording drug standards and specifications The R & D and production of all drugs should conform to the standards of Pharmacopoeia, including the inspection standards of medical devices The application of nitrogen blowing instrument in the field of medicine, especially in the detection and analysis of traditional Chinese medicine, the technology fully conforms to the index of Pharmacopoeia, and plays an important role in the production and detection of pharmaceutical industry Nitrogen blowers are classified according to heating methods, which can be divided into water bath nitrogen blowers and dry nitrogen blowers Water bath nitrogen blowers are heated with water, and the temperature range is room temperature - 100 ℃ Advantages: water as a medium, temperature uniformity is better! Disadvantages: it will produce water vapor and pollute the sample Temperature can only reach 100 ℃ Dry nitrogen blowing instrument uses aluminum fast to heat The temperature range is room temperature - 150 ℃ Advantages: fast heating time, high temperature! Disadvantages: uneven heating Hangzhou Chuanyi instrument has a wide range of nitrogen blowers, including water bath nitrogen blowers and dry-type nitrogen blowers Water baths can be divided into square water bath, circular water bath, circular electric water bath and full-automatic nitrogen blowers Square water bath: each hole is controlled independently, temperature is from room temperature to 100 degrees, standard aperture is 15mm, and no flowmeter is provided Round water bath: with the advantages of water bath 1, the whole stainless steel, acid and alkali proof 2 Bore diameter: 10-55mm 3 The main engine is equipped with flowmeter 4 The purging needle can be adjusted up and down 5 It can be used in 360 degree rotation! Round electric is a fully automatic nitrogen blower that can be raised and lowered electrically on the basis of round It uses water to heat, can make up water automatically, and has fixed concentration nitrogen blower at a fixed time The alarm function (cover opening, concentration completed, water bath water volume or nitrogen pressure insufficient) is the whole machine It does not need to be placed in the ventilation cabinet! Constant concentration: equipped with special optical sensor to automatically and independently detect the end point When the sample is purged to the specified capacity, automatic stop timing: set time, stop at the point, set concentration timing: set time and capacity, stop at the point