Microwave digestion tankIt is a laboratory sealed reactor designed specifically for chemical sample digestion and substance synthesis under high temperature and high pressure conditions.
Microwave digestion tankThe workflow:
Microwave energy conversion: Polar molecules in the sample (such as nitric acid, hydrochloric acid, and other acid solutions commonly used for digestion) vibrate at high frequencies in a microwave field, causing friction between molecules and generating heat, which rapidly increases the temperature inside the tank (usually up to 180-240 ℃, and some high-pressure tanks can reach above 300 ℃).
Formation of high-pressure environment: The tank is a closed space, and an increase in temperature can cause acid vaporization and gas expansion, forming a high-pressure environment.
Rapid digestion reaction: High temperature and high pressure significantly enhance the oxidation and reaction activity of acid, accelerating the decomposition of organic and inorganic substances in the sample. Traditional digestion, which originally required several hours or even days (such as electric heating plate digestion), can be shortened to 10-30 minutes, with more thorough digestion and less sample loss.
Advantage:
Efficient and fast: The digestion time is shortened to 10-40 minutes, which is 5-10 times that of traditional electric heating plate digestion (2-24 hours), significantly improving laboratory throughput.
Uniform heating: Microwaves are directly applied to the interior of the sample to avoid uneven heat conduction, ensuring that all parts of the sample are heated simultaneously and increasing digestion efficiency by more than 30%.
Energy saving and environmental protection: Reduce the amount of acid used to 5-10mL (traditional method 20-50mL), reducing reagent costs; Fully enclosed system reduces acid mist volatilization and improves laboratory environment.
Reduce element loss: The sealed digestion tank prevents volatile elements (Hg, As, Se) from evaporating, reducing the detection limit to ppb level.
High degree of automation: supports programmable temperature and pressure control, and the turntable rotates continuously 360 ° to evenly heat each tank, reducing manual operation errors.