Coal standards

Coal standards with carbon, sulfur, hydrogen and nitrogen certified. Some of listed CRMs have oxygen, chlorine and mercury certified as well.

Catalogue No.	C%	S%	H%	N%	Cl%	F%
AR1751	71.37	0.511	3.25	0.932	(0.0130)	(0.0105)
AR1757	39.83	6.20	1.82	0.40	0.0283	0.0201
AR2776	72.40	1.11	4.52	1.42	(0.0185)
AR2778	73.05	0.86	3.54	1.27
AR2780	64.27	3.31	4.04	1.19	(0.121)
AR2781	73.07	2.40	4.77	1.50
AR1756	42.75	5.08	3.11	0.69	0.0253	0.0193

The value in parentheses is a non-certified parameter