Graphite digestion instrumentIt is currently a direct, effective, and economical sample pretreatment method for elemental analysismethodone of. With the technological innovation and development of laboratory equipment, graphite digestion equipment has gradually gained more favor among digestion experimenters due to its advantages of large-scale processing, high intelligence, efficient wrapped digestion, good temperature uniformity, and safer atmospheric pressure digestion. Graphite digestion is commonly used in atomic absorption, atomic fluorescence ICP、ICP-MS、 In the sample pretreatment of polarography and other instruments.

Dissolve case ()

1. Weigh 0.2g of soil standard sample GBW-07430 (GSS-16) and place it in 50ml ofPolytetrafluoroethyleneethylenetubeAdd about 1ml of high-purity water to wet the soil and shake well;

2. Place the sample tube inGraphite digestion instrumentDissolve in the middle;

3. After filtering the stored sample, it is ready for testing；

acid driving-off

1. The acid system consists of 6ml hydrochloric acid, 4ml nitric acid, 1ml perchloric acid, and 8ml;

2. Add a reflux cap for digestion, and remove the reflux cap during the acid removal stage;

3. The fixed volume is 25ml;

4. Acid needs to be rushed to near dryness；

Advantage

1.Graphite heating element: PTFE protective layer, three-dimensional wrapped heating, uniform temperature, higher efficiency;

2.The heating module adopts isostatic pressed high-purity ultrafine graphite, with uniform heating to ensure that the temperature difference between each digestion hole is less than ± 1.0 ℃;

3. Accurate temperature control， PID parameter self-test, adjustable heating rate, temperature control accuracy ± 0.1 ℃, single hole temperature fluctuation ± 1.0 ℃;

4.Split design, more user-friendly. Separate the controller from the digestion unit to prevent corrosion of electronic components.

5.Closed design effectively prevents heat loss while avoiding the invasion of acid mist.