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Anonymous users2024-02-15After more than ten years of unremitting efforts, "Yiyao Technology" has become a leader in the field of microwave chemistry and sample preparation in China. In 2001, the first self-developed "temperature and pressure dual control" WX-2000 microwave digester was launched. In 2005, two microwave digesters, WX-8000 and Excel, which "have industrial-grade microwave resonators", were launched; In 2008, the first NOVA "single-mode microwave synthesizer" in China was launched; In 2010, the "touch intelligent microwave digestion instrument" and raptor "microwave high temperature furnace" were launched; In 2011, the first Q2 "microwave moisture analyzer" in China was launched; In 2012, it launched the dual-screen display industrial-grade TOPEX "all-round microwave chemical work platform"; In 2013, the EXTRA "automatic solid phase extractor" was launched; In 2014, the Clever "Automatic Solid Phase Extractor" was launched; In 2015, the N1 was launched....
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Anonymous users2024-02-14Principle of digestion:
Destroy organic or reducing substances in the sample with acid or lye and under heating conditions.
Commonly used acidolysis systems are:
Nitric acid-sulfuric acid, nitric acid-perchloric acid, hydrofluoric acid, hydrogen peroxide, etc., which can destroy organic matter and reducing substances such as cyanide, nitrite, sulfide, sulfite, thiosulfate and thermally unstable substances such as thiocyanide in sewage and sediment;
The problems that should be paid attention to in digestion are:
During the digestion process, the components to be tested shall not be lost;
No interfering substances shall be introduced;
Be safe and fast, and don't make subsequent steps difficult;
The resulting solution must be suitable for the selected monitoring method.
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Anonymous users2024-02-13<> digestion, also known as wet digestion, is a method of destroying organic or reducing substances in a sample with acid or lye and under heating conditions. Commonly used acidolysis systems are: nitric acid sulfuric acid, nitric acid perchloric acid, hydrofluoric acid, hydrogen peroxide.
They can destroy all organic matter and reducing substances such as cyanide, nitrite, sulfide, sulfite, thiosulfate and thermally unstable substances such as thiocyanide in sewage and sediment; Caustic soda is mostly used for alkaline hydrolysis.
Solution. Digestion can be done in crucibles (nickel, PTFE.
can also be used in high-pressure digestion tanks. The issues that should be paid attention to in digestion are:
1. In the process of eliminating trouble, the components to be measured shall not be lost by the liquid gauge.
2. Do not introduce interfering substances.
3. Be safe and fast, and do not bring difficulties to the subsequent operation steps.
4. The solution prepared by digestion must be suitable for the selected monitoring method.
Effect of digestion:
Generally speaking, the components contained in environmental water samples are complex, and most of the polluting components have low content and different morphologies, so they often need to be treated before analysis and determination. The purpose of digestion treatment is to destroy the disturbing organic matter, dissolve the suspended solids, and oxidize the various valence states of the elements to be measured into a single ** state or transform them into inorganic compounds that are easy to separate.
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Anonymous users2024-02-12The principle of digestion of lead base:
Acids or lyes are used and heated to destroy organic or fibrinogenic substances in the sample.
Commonly used acidolysis systems are:
Nitric acid-sulfuric acid, sulfuric acid-perchloric acid, hydrofluoric acid, hydrogen peroxide, etc., which can destroy organic matter and reducing substances such as cyanide, nitrite, sulfide, sulfite, thiosulfate and thermally unstable substances such as thiocyanide in sewage and sediment;
The problems that should be paid attention to in digestion are:
During the digestion process, the components to be tested shall not be lost;
No interfering substances shall be introduced;
Be safe and fast, and don't make subsequent steps difficult;
The resulting solution must be suitable for the selected monitoring method.
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Anonymous users2024-02-11The principle of digestion is to destroy organic or reducing substances in a sample with acid or lye and under heating conditions.
Commonly used acidolysis systems are: nitric acid-sulfuric acid, nitric acid-perchloric acid, hydrofluoric acid, hydrogen peroxide, etc., which can destroy the organic matter and reducing substances in sewage and sediment such as cyanide, nitrite, sulfide, sulfite, thiosulfate and thermally unstable substances such as thiocyanide; Caustic soda solution is mostly used for alkaline hydrolysis. Digestion can be carried out in crucibles (nickel, PTFE) or in high-pressure digestion tanks.
The issues that should be paid attention to in digestion are:
During the digestion process, the components to be tested shall not be lost;
No interfering substances shall be introduced;
Be safe and fast, and don't make subsequent steps difficult;
The resulting solution must be suitable for the selected monitoring method.
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Anonymous users2024-02-10The role and significance of digestion: Generally speaking, the components contained in environmental water samples are complex, and most of the polluting components have low content and different forms, so they often need to be treated before analysis and determination. The purpose of digestion treatment is to destroy organic matter, dissolve suspended solids, and oxidize the elements to be measured in various valence states into a single ** state or transform them into inorganic compounds that are easy to separate.
Hello landlord: There are mainly the following types of wet digestion methods: nitric acid digestion method, nitrate perchloric acid digestion method, nitrate monosulfuric acid digestion method, sulfuric acid monophosphoric acid digestion method, sulfate potassium permanganate digestion method, multiple digestion method, alkali decomposition method. >>>More
Zanthoxylum bungeanum is an economic tree species with a long history of cultivation in China, such as edible spices, spices, oilseeds and medicinal materials. Its economic utilization is mainly fruit. The peel of Zanthoxylum pepper is rich in volatile oils and fats, which can be distilled to extract aromatic oils as raw materials for food spices and flavors; The peel has a strong hemp fragrance, and it is a good condiment that the people of China generally like to eat; The oil content of the seeds is 25% 30%, and the pepper oil extracted is dry, which can be eaten or used as industrial oil for soap, paint, lubrication, etc.; Peel stems, seeds and roots, stems, and leaves can be used as medicine, which has the functions of dissipating cold in temperature, killing insects with dampness, and relieving pain, and the young branches and fresh leaves can be directly used as seasonings for stir-frying or as auxiliary ingredients for pickles.
Indicates the part of the text that is referenced. There are two types of quotation marks: double quotation marks and single quotation marks. Generally, double quotation marks are used, and single quotation marks are used if there is a quotation within the citation. >>>More
The thermostat, also known as the "water bladder", is used to open or close the valves of the large and small circulation channels according to the water temperature, and control the engine coolant to flow according to the large or small circulation. When the engine is cold, the water tank is turned off, and the water tank water circulates in the engine waterway (i.e., "small circulation"), which is not cooled by the water tank, so the water temperature can quickly rise to the normal working temperature of the engine. When the temperature continues to rise, the water tank is turned on, and the tank water can flow into the tank, thus controlling the temperature from rising. >>>More
What is my role? The effect of the virus is harmful to your body, so if you want to have a virus, you must go to the hospital, let the doctor recuperate for you, take some medicine, and the doctor will take care of you.