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).