The graphite digestion instrument uses nickel chromium ultra-thin flat heating source to heat high-purity graphite blocks. The high-purity graphite blocks have excellent thermal conductivity, suitable heat capacity, and processability. After drilling, the graphite blocks can be uniformly heated in a three-dimensional manner around a batch of samples. The heating of each part of the sample is uniform, which greatly prevents heat loss and eliminates temperature differences in different parts of the same sample
1. The new intelligent graphite digestion instrument adopts high-precision PI temperature measuring elements and temperature control technology. Therefore, its temperature accuracy can reach 0.2 ℃. Due to the use of modern intelligent control technology, multi-step processing, ramp heating, and arbitrary heating time setting are achieved, making unmanned batch processing a reality. The proven mature digestion method can be stored and called at any time, and real-time display of temperature curves and other functions also bring convenience to users. The high-end intelligent graphite digestion instrument also provides PDA Bluetooth wireless control function, allowing operators to stay away from harmful gases and heat sources
Compared with traditional electric furnaces, plate heaters, and water bath heating equipment, the new intelligent graphite digestion instrument and microwave digestion instrument have advantages in heating uniformity, temperature accuracy, working temperature range, cross contamination, and corrosion resistance. But in terms of multi-step processing, sample throughput, safety, intelligence, etc., the new intelligent graphite digestion instrument is superior to the microwave digestion instrumentEasyplanTherefore, it is more suitable for application in the daily digestion of ordinary samples
The working principle of microwave digestion is that the mixture of sample and acid generates intense vibrations and collisions between internal molecules under the action of the alternating magnetic field generated by microwave, resulting in a rapid increase in the temperature inside the heated material and the generation of high pressure in a closed sample container, thus posing a danger
The high temperature and high pressure conditions of microwave digestion require high strength and sealing of polytetrafluoroethylene materials used to make digestion containers, and the need for a long cooling and pressure reduction time (i-4 hours) before removing the sample processing solution is also a disadvantage. Currently, there are a few shortcomingsHigh sectionThe microwave digestion instrument also has a built-in water cooling system.
2. Innovations brought about in practical applications+
Fire accidents caused by unmanned night time digestion function using electric furnace heating occasionally occur, and microwave digestion is also involved
There have also been many accidents, and the new intelligent graphite digestion instrument has over temperature protection and current over-current protection functions. It can complete digestion under normal pressure, so its safety is high among several devices. The use of an intelligent controller enables multi-step processing. An unmanned program can be set up as needed to start or stop heating at any desired time
In the digestion process of some organic rich samples such as milk powder, honey, seaweed, etc., cold digestion is often required. If an intelligent graphite digestion instrument is used, an unmanned program can be set up. After the cold pre digestion is completed, the heating program is automatically started, and the experimenter can take the digested samples for analysis and testing on the machine after going to work, which improves efficiency, saves manpower and costs
Sample digestion is a time-consuming process, and unmanned functionality is a direction for sample processing automation