Provisional certified values (%)
Okai, Terashima, Imai: Bunseki Kagaku, 51, 973 (2002)
	JCu-1		JZn-1
	Mean	SD	Mean	SD
TiO2	0.013	0.001	0.20	0.01
Al2O3	0.29	0.01	6.32	0.02
MnO	0.59	0.01	1.49	0.01
MgO	2.13	0.05	1.94	0.04
CaO	23.5	0.1	18.1	0.1
Na2O	0.052	0.003	0.45	0.01
K2O	0.015	0.001	0.83	0.03
T-Fe	17.5	0.1	11.8	0.1
Cu	3.73	0.05
Zn	0.0679	0.0015	2.22	0.01
Pb			0.161	0.002
Uncertainty is 95% confidence limits.
Reference: GSJ analytical results for other elements
Okai, Terashima, Imai: Bunseki Kagaku, 51, 973 (2002)
	JCu-1		JZn-1		Method
(%)
SiO2	28.68		43.95		GRAV
P2O5	<0.005		<0.005		COLOR
H2O+	1.00		1.71		GRAV
H2O-	0.54		0.61		GRAV
LOI	15.37		6.61	6.58	GRAV	GRAV
T-C	3.06		1.28		CEA
T-S	7.00	7.02	1.30	1.27	CEA	ICPES
(ug/g)
As	173		99		AA
Ba	3.5	3.9	208	207	ICPES	ICPES
Cd	3.6	3.1	114	121	AA	ICPES
Co	324	324	24	24	AA	ICPES
Cr	10	7	21	20	AA	ICPES
Cu			29	20	AA	ICPES
Li	2.9	3.0	19.5	21.6	AA	ICPES
Ni	425	407	6	11	AA	ICPES
Pb	4				AA
Rb	1.9		42		FE
Sb	3.8		31		AA
Sr	75	78	358	357	ICPES	ICPES
V	9		24		ICPES