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

Table 5

Comparison of concentrations of radicals obtained in CRM digested by microwave digester and conventional method.

S. No.	Radicals	Certified Value	Microwave digested sample	Conventionally digested sample
1	SiO2 (%)	16.07	16.11	16.18
2	Fe (%)	14.94	15.00	15.07
3	Mn (%)	21.28	21.31	21.37
4	Al2O3 (%)	1.65	1.64	1.63
5	Ca (%)	1.80	1.79	1.81
6	Cu (%)	0.49	0.49	0.49
7	Ni (%)	0.71	0.71	0.70
8	Co (%)	0.14	0.14	0.14

Note: All results are mean of triplicate measurement. All concentrations are % w/w.