Stable isotope method is an important research method in various disciplines such as atmosphere, hydrology and ecology.Hydrogen and oxygen stable isotope determination of soil and plant water is widely used in the study of plant transpiration and spiration, root water use efficiency, and plant water transport and absorption mechanism.Traditional plant and soil water extraction methods mainly include low-temperature on-line distillation and coloiling distillation.Low-temperature distillation method is currently a more general water extraction method, but liquid nitrogen needs to be added, the operation is cumbersome, and the glass components are vulnerable.Coboiling distillation method requires adding expensive toluene or xylene as a solvent, which is not only harmful to the body, but also pollute the environment.With the development of isotope analysis technology, the water isotope measurement speed is getting faster and faster, and the existing water extraction methods have been unable to meet the needs of users.Therefore, having a set of simple operation and fast extraction of fully automatic plant and soil water extraction equipment, is an urgent requirement of the current water isotope research work.
qualification:
1. Working principle: Unique designed automatic ultra-low voltage and low temperature condensation method;
2. Extraction speed: 120 samples / day;
3. Number of samples that can be extracted simultaneously: 16
4. Drawing rate:> 98%;
5. Recovery rate: 99% -101%;
6. Vacuum pump: 5 L/min, 24V, higher pressure, 0.3bar;
7. Refrigeration: the built-in compressor is fully automatic refrigeration, with non-liquid nitrogen refrigeration, and has a lower refrigeration temperature, up to-103℃;
8. Heating: electromagnetic heating, higher heating temperature, up to 150℃;
9. Display and operation: TFT LCD (12-inch, 800 * 480,65536 color) touch-type human-computer-friendly interactive interface;
10. Dimensions: 8570100 cm
11. Weight: 110 kg.
