Rapid Microwave Digestion Procedures for the Elemental Analysis of Alloy and Slag Samples of Smelted Ocean Bed Polymetallic Nodules

Table 1

Conditions for Microwave digestion of samples.

Experiment Number	Sample weight (gram)	HCl (mL)	HNO3 (mL)	Power (Watt)	Temperature (^°C)	Digestion time (minutes)	Ventilation time (minutes)
M1	0.1	16	2.00	500	150	90	30
M2	0.1	10	3.50	500	150	90	30
M3	0.1	16	2.00	500	150	40	10
M4	0.1	10	3.50	500	150	40	10

Note: M stands for Microwave digestion.