Precautions for moisture determination in petrochemical products

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Drain all the solution. A 2-5 ml sample was injected into the titration cell. After adding several samples, the dried syringe was rinsed at least three times with the sample. The anode cell may begin to split into two phases. At this point, the agitation was stopped and the upper oil phase was withdrawn. If the drift value becomes unstable and begins to increase, the reagent must be replaced.

It is usually determined by the Coulometric method. In order to improve the solubility of long-chain hydrocarbons, the moisture analyzer of samples such as hydrocarbons is relatively simple. Due to the low water content. Add solubilizer. Double health will not be disturbed. Can be measured are pentane, hexane, dimethyl butane, methyl butadiene, benzene, toluene, xylene, ethyl toluene, dimethyl styrene, octane, dodecane, tetradecene, Eicosane, octadecane, petroleum ether, gasoline, cyclohexylamine, methylcyclohexylamine, cycloheptane, ethylene cyclohexylamine, cyclododecane, nonylcyclohexane, dicyclopentane Alkene, dimethylnaphthalene, trimethylstyrene, biphenyl, indoline, methylene phenanthrene, isomethyl cumene, norbornadiene.

Mineral oil (crude oil, heavy oil)

Homogenization (ultrasonic) must be performed before analysis. These samples contain tar, and the moisture distribution of such products is not uniform. Will contaminate the electrode and the electrolytic cell. Zui is well titrated by volumetric method and added with solubilizer.

Crude oil 10ml methanol + 1010ml chloroform + 10ml toluene

Heavy oil 10ml methanol + 1010ml chloroform + 20ml toluene

Insulating oil, hydraulic oil. Transformer oil and turbine oil

A solubilizer is required. The moisture content of these products is determined by the Coulometric method (with diaphragm electrode) because the solubility in his anolyte is not very good.

The following methods are suitable for samples with very low water content:

It is necessary to shake the titration cup by hand from time to time, and the pre-titration process of the titration cup. Remove moisture attached to the walls. It is important for zui to get the lowest and stable drift value possible.

For the treatment of diseases of the respiratory system:
Diseases and conditions of the respiratory system fall into two categories: Viruses such as influenza, bacterial pneumonia and the new enterovirus respiratory virus that has been diagnosed in children; and chronic diseases, such as asthma and chronic obstructive pulmonary disease (COPD). According to Dr. Neal Chaisson, who practices pulmonary medicine at the Cleveland Clinic, there is not much that can be done for viral infections but to let them run their course. "Antibiotics are not effective in treating viruses and the best thing to do is just rest," he said.

COPD is the intersection of three related conditions - chronic bronchitis, chronic asthma and emphysema, Chaisson told Live Science. It is a progressive disease that makes it increasingly difficult for sufferers to breath.

Asthma is a chronic inflammation of the lung airways that causes coughing, wheezing, chest tightness or shortness of breath, according to Tonya Winders, president of the Allergy & Asthma Network. These signs and symptoms may be worse when a person is exposed to their triggers, which can include air pollution, tobacco smoke, factory fumes, cleaning solvents, infections, pollens, foods, cold air, exercise, chemicals and medications.

Lung cancer is often associated with smoking, but the disease can affect non-smokers as well. Every year, about 16,000 to 24,000 Americans die of lung cancer, even though they have never smoked, according to the American Cancer Society. Like all cancers, lung cancer is caused by the uncontrolled growth of abnormal cells.

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