Introduction of analytically pure ammonia

Analytically pure ammonia is a high-purity ammonia solution, usually containing very low impurities and ions, suitable for precise analysis and application in laboratories, industrial production and scientific research. It is prepared through a rigorous purification and testing process to ensure that it contains no impurities that could interfere with analytical results. Analytically pure ammonia is usually used in the preparation of standard solutions, sample pretreatment, gas chromatography, liquid chromatography, mass spectrometry and other analytical techniques, as well as in some specific chemical synthesis and experimental processes as a precise reaction agent.

Second, the use of analytically pure ammonia

1, Standard solution preparation: analytically pure ammonia can be used for the preparation of standard acid-base solution, used to calibrate pH meter, acidometer and other analytical instruments to ensure the accuracy of measurement.
2, pH regulator: in chemical experiments, analytically pure ammonia is often used to adjust the pH value of the reaction system, to maintain the reaction in the appropriate acid-base equilibrium conditions.
3, Sample pretreatment: In analytical chemistry, analytically pure ammonia can be used for sample pretreatment, such as neutralizing acidic samples, extracting analytes, etc., to prepare for subsequent analysis.
4, Gas Chromatography (GC): Analytically pure ammonia is used as the carrier gas for gas chromatography to introduce the samples into the chromatographic column to realize separation and detection.
5, Liquid chromatography (HPLC): as one of the mobile phases of liquid chromatography, analytically pure ammonia can help to separate compounds in complex mixtures.
6, mass spectrometry: analytically pure ammonia is commonly used in mass spectrometry analysis of sample ionization, diffusion and other processes, which helps to produce a stable mass spectrometry signal.
7, drug synthesis: in drug development, analytically pure ammonia is used to neutralize, adjust pH, control reaction conditions, and promote drug synthesis.
8, semiconductor manufacturing: analytically pure ammonia is used in the semiconductor industry to clean the semiconductor surface, remove impurities and contaminants to ensure product quality.
9, Environmental monitoring: analytically pure ammonia is used in the processing of environmental samples to neutralize or adjust the pH of the samples for accurate environmental monitoring.
10, biomedical research: in biochemical experiments, analytically pure ammonia can be used as a reagent for DNA/RNA purification, protein extraction and other operations.

C. Precautions for analytically pure ammonia

1, protective measures: use should wear appropriate laboratory protective equipment, such as lab coats, gloves, goggles, etc., in order to avoid direct contact with the skin and eyes.
2, ventilated environment: in the operation of analytical pure ammonia, should ensure that the operating environment is well ventilated, in order to prevent the evaporation of ammonia caused by air pollution, and at the same time to protect the health of the operator.
3, Operating surface: place analytically pure ammonia on a stable surface to prevent the solution from spilling and tipping.
4, avoid mixing: analytically pure ammonia is alkaline, do not mix with acidic substances to avoid harmful gases or dangerous chemical reactions.
5, Careful operation: avoid sudden heating or violent stirring in the process of use, so as not to cause rapid volatilization and diffusion of ammonia.
6, Storage conditions: When storing analytical pure ammonia, it should be kept sealed and avoid contact with air to prevent changes in the concentration of the solution.
7, the amount of control: the use of analytical pure ammonia, according to the experimental needs of the control of the amount of use, to avoid the waste of too much solution.
8, safe disposal: after use, unused analytical pure ammonia should not be poured back into the original container, should be in accordance with the provisions of the safe disposal.
9, Emergency response: If accidentally spilled analytically pure ammonia to the skin, eyes or mouth, should be immediately flushed with a large amount of water, if there is a serious reaction should be immediately seek medical attention.
10, Reference: Before operation, consult the relevant information and safety data sheet of analytical pure ammonia to understand its nature, characteristics and safe operation methods.

Fourth, how to store analytically pure ammonia

1, sealed storage: analytically pure ammonia containers should be well sealed to prevent the volatilization of ammonia and outside air contact. After use, the bottle should be sealed in a timely manner.
2, light storage: analytical pure ammonia stored in a light environment, to prevent light and ultraviolet radiation, in order to avoid its decomposition and concentration changes.
3, dry environment: avoid analyzing pure ammonia exposed to humid environment, in order to prevent moisture into the solution, affecting the concentration and quality.
4, away from acidic substances: analytically pure ammonia should be stored in a place separate from acidic substances to avoid unnecessary chemical reactions.
5, away from fire: analytically pure ammonia is a volatile liquid, it should be kept away from open flames and high temperature areas to avoid fire or volatilization.
6, stable temperature: try to analyze pure ammonia stored in a constant temperature environment, to avoid temperature fluctuations caused by liquid evaporation or concentration changes.
7, labeling identification: label on the container, indicating the name of the solution, concentration, date of preparation and other information, in order to identify and manage.
8, storage area: analytically pure ammonia should be stored in a specialized chemical storage area, away from food