ODLAB - Model EcoPre - Graphite Digestion System
From Graphite Digestion System
Used Graphite material instead of aluminum to prevent heavy metal pollution. Teflon-coating prevents corrosion due to harmful gas. Block type production maximizes digestion efficiency to reduce digestion time. Used high purity PFA Teflon acid sample digestion vessel. Compatible with pressure digestion vessel and general beaker. Tailored production possible for Graphite block. Applied 24 sample treatment and diverse wet analysis digestion methods from homw and abroad simultaneously(DIN ISO 11466-Soil Aqua-regia Digestion Method, Korea Marine Environment Test Method, Korea Food Test Method,IEC 62321,US-EPA 3050).
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Teflon Digestion Vessel Design(BaekDu)
High purity PFA Teflon digestion vessel comprised of Digestion Vessel and Trap tube passes ∩-tube (has 1mm diameter holes in the below part) while the vapor passes the middle part to be air cooled and condensed, and the gas has the mechanism to be emitted to the highest part of the entrance of collection tube.
Each part is designed to be tightened by turning. The screw to maintain the reaction pressure.
Digestion Vessel Principle (BaekDu)
High purity PFA Teflon acid sample digestion vessel realizes acid circulation and sampling succession as the below image.
That is when the heating starts, the hot vapor coming out from the reaction vessel passes the ∩ tube of collection tube and meets the cold air within the collection tube to be air cooled and condensed and be accumulated in the collection tube.
Once all the acid in the reaction vessel moves up in the collection tube, the pressure falls and the vapor that was accumulated in the collection tube falls down again. Such process is repeated until the digestion is completed.
Digestion Vessel Characteristics (Baek Du: Patent no.10-0933151)
The vessel is manufactured by using the 440HP PFA Teflon material produced by US Dupon and can be heated up to approximately 260C in successive used temperature. This vessel comprised of digestion vessel and vessel can digestion through recycle principle by injecting the acid one time and can collected and digestion gas elements such as Hg,As,B that is gasified by collection tube.
Furthermore, the vessel protects analyzer from harmful gas that is generated during pretreatment and can extend the use life of lab hume hood.
In the meantime, it does not break easily like glass during used, therefore can be used for a long time and reduce the lab operation cost.
PCT International Patent Application - USA, Japan, China, United Kingdom, Germany, Canada, India.