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UV-Vis spectrophotometer in other fields
Key words: UV-visible spectrophotometer; US instrumentation ; UV-1100; UV-1800
The UV-Vis spectrophotometer is an essential analytical instrument for the pharmaceutical industry and the drug testing industry, as well as other applications, and a brief introduction. Application in drug analysis The pharmacopoeia in many countries in the world and in the world clearly stipulate that many drugs require an ultraviolet-visible spectrophotometer for quality control. Therefore, the UV-Vis spectrophotometer is an essential analytical instrument for the pharmaceutical industry and the drug testing industry. It is also stipulated that the UV-Vis spectrophotometer used for drug quality control requires a spectral bandwidth of less than 2 nm. UV-visible spectrophotometers have been widely used in drug testing. Among them, the most commonly used drugs using UV-Vis spectrophotometer are: vitamins, antibiotics, antipyretics, painkillers, blood pressure lowering drugs, tranquilizers, antitussives, eye drops, sulfa drugs, diuretics, certain Gynecological drugs, dysentery drugs, diarrhea drugs, anti-tumor drugs, anti-tuberculosis drugs, etc. Petroleum oil analysis In the process of oil exploitation and processing, oil may cause pollution. In the production of sewage from the petroleum industry, the content of petroleum in the drainage is generally specified as 10 mg / L.至0. 3mg / L。 In the surface water, the maximum allowable oil content of 0. 1 ~ 0. 3mg / L. In general petroleum refineries, the aromatic hydrocarbon composition of petroleum is relatively stable, and the absorption peaks of the standard oils are measured at 221 to 225 nm and 251 to 255 nm. The two characteristic absorption peaks of petroleum (225 nm and 254 nm) are the absorption wavelengths to be used in determining the oil content in refinery wastewater. In addition, the light oil component (initial distillation about 180 ° C) has almost no obvious UV absorption, while the medium oil (180-250 ° C) and heavy oil (250-280 ° C), as well as eucalyptus oil (> 280 ° C) and other components at 225 nm Strong absorption. It represents the main peak of the petroleum component, which is weakly absorbed at 254 nm and sometimes shows the characteristics of a certain heavy oil. These analytical work were performed using an ultraviolet-visible spectrophotometer. Also, in the refining process, oil has an aromatic impurity near 320 nm, which must also be detected by an ultraviolet-visible spectrophotometer. Therefore, the UV-Vis spectrophotometer is a very important quality control instrument in the petroleum industry. Many of the toxic and hazardous substances in the environment for detecting harmful substances in the environment (including air, water, and soil) use ultraviolet-visible spectrophotometers, such as lignin sulfonic acid, lignin, and tannin in tap water. A substance that is toxic to humans such as surfactants, fulvic acid, phenols, anilines, and nitrophenols. Some tap waters contain substances such as ammonia nitrogen, nitrite, total phenol, total aniline, and nitrophenols that are toxic to humans, and are generally detected by an ultraviolet-visible spectrophotometer. In China's water-related national standards, many substances in water are required to be detected by an ultraviolet-visible spectrophotometer. In the feed industry, vitamin A, vitamin C, vitamin E, vitamin K, sorbic acid, benzoic acid, cotton acid, methyl ester, acetate, carotene, niacin, etc. in raw materials, additives, mixed feeds, etc. Trace elements such as total amino acids such as potassium, iron, selenium, iodine, copper, phosphorus, and manganese are often detected by a violet ultraviolet-visible spectrophotometer. Further, the determination of the fly fly phosphorus, the sulfonamide, the griseofulvin, the dimetridazole, and the procaine in the feed additive can be basically carried out by an ultraviolet-visible spectrophotometer. Pesticides and their residues are analyzed for pesticides that enter the soil, some are absorbed by crops (such as BHC, which can be absorbed by carrots, peanuts, etc.), some enter the atmosphere, and some enter the water. Pesticide residues include pesticides, toxic metabolites of pesticides, pesticide degradants and impurities. People often only regard pesticides as pesticide residues, ignoring metabolites, degradants and impurities of pesticides. In fact, the toxicity of metabolites and degradants is the same or more serious than the original drug. For example, the metabolite of DDT is Drip, the metabolite of industrial BHC is BHC, and the metabolite of Pesticide 1605 is 1601. These metabolites are more toxic than the original. The metabolites of the insecticide are 10 times more toxic than the original drug. Many pesticides are very harmful to the human body. For example, BHC and DDT are very damaging to human liver tissue and liver function, which can cause chromosomal mutations in blood cells. Organochlorine pesticides can enter the fetus through the placenta and harm the fetus. Organophosphorus pesticides, carbamate pesticides, etc. are neurotoxic substances, which inhibit the activity of acetylcholinesterase in blood and tissues, causing disorders of nerve function, sweating, confusion, and language disorders. According to the American Cancer Research Center, 90% of human cancers are caused by organic matter, mainly pesticide residues. Therefore, developed countries pay great attention to the detection of pesticides and their residues. For example, Japan has developed nearly 10,000 MRLs for hundreds of pesticides in recent years. Among them, there were 3,728 vegetables, and the maximum residue limit of 116 pesticides was established for rice. Humans continue to ingest a small amount of pesticide residues in a long period of time, the most terrifying is the cause of three, that is, carcinogenic, teratogenic and mutagenic. Aquatic product quality control UV-visible spectrophotometer has been widely used in the quality control of seawater, freshwater fish, shellfish, shrimp, jellyfish and so on. Such as benzene, total trihalomethane, tolyltriazole, polychlorinated biphenyl, fluorine, mercury, etc. (VIII) Aquatic product quality control UV-visible spectrophotometer in seawater, freshwater fish, shellfish, shrimp, jellyfish, etc. The quality control has been widely used. Such as benzene, total trihalomethane, tolyltriazole, polychlorinated biphenyl, fluorine, mercury, etc., currently use UV-visible spectrophotometer for quality control. The most terrifying thing about people is the enrichment of the food chain. For example, the “Drug of the Century†has a enrichment factor of more than 104 in fish. It can also be detected by an ultraviolet-visible spectrophotometer. Therefore, UV-visible spectrophotometers will be an indispensable analytical tool in fisheries. Currently, UV-visible spectrophotometers are used for quality control. The most terrifying thing about people is the enrichment of the food chain. For example, the “Drug of the Century†has a enrichment factor of more than 104 in fish. It can also be detected by an ultraviolet-visible spectrophotometer. Therefore, UV-visible spectrophotometers will be an indispensable analytical tool in fisheries. Key words: UV-visible spectrophotometer; US instrumentation ; UV-1100; UV-1800 T Copper Tube Terminals
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