The role of automatic graphite digestion instrument in the pretreatment of soil heavy metals---Nanjing Binglab

Cadmium is a harmful heavy metal element, which is very harmful to human health. Therefore, we need to pay attention to and strengthen the monitoring, control and prevention of cadmium. Cadmium mainly comes from wastewater discharged from electroplating, mining, smelting, fuel, battery and chemical industries. We need to reduce cadmium discharge from the source and strengthen food safety supervision to prevent people from being harmed by eating cadmium-contaminated food. As for the land and environment that have been polluted by cadmium, we need to take appropriate measures for treatment and restoration.

Heavy metal pollution in soil will cause damage to the physical and chemical properties of the soil itself, such as changing the composition, structure and function of the soil, inhibiting the growth and yield of crops, and even leading to crop failure. At the same time, heavy metals will also be enriched into the human body through the food chain, posing a threat to human health. Therefore, it is of great significance to establish and develop a simple, rapid, economical and practical method for the analysis of heavy metal elements in soil to monitor the level of environmental metal pollution and maintain human and ecological health.

However, since the soil is a solid sample and the matrix is complex, in order to accurately analyze the heavy metals in it, it must be effectively treated by pre-treatment methods such as digestion. At present, there are many pretreatment methods available for soil sample analysis, among which automatic graphite digestion is an efficient and accurate digestion method.

The automatic graphite digestion instrument launched by Nanjing Binglab can process up to 60 samples at a time. At the same time, it can realize the automatic unattended digestion process, which completely liberates manpower and minimizes the harm to the experimenter’s body. High, it has more advantages than microwave digestion in soil heavy metal pretreatment.

The automatic graphite digestion instrument is a pretreatment instrument that cooperates with the detection of heavy metal elements such as AAS, ICP, and ICP-MS. The instrument adopts the experimental principle of wet digestion, automatic liquid addition, mixing, program temperature control digestion, acid removal, cooling, constant volume and other experimental steps, to avoid the operator’s exposure injury in the experiment and liberate manpower; the instrument is heated by the graphite body, the whole sample is digested by heat, and the experimental conditions such as the volume of the digestion solution, the digestion temperature, time and other experimental conditions are accurately controlled, making the digestion experiment safe and controllable, and the digestion data is accurate, stable and reliable.