Table 1.

Results of spectrochemical analysis of purified isotope samples

Quantitative (with standards) determinations of concentrations
Element	24MgO	26MgO	Estimated limits of detection
	ppm	ppm	ppm
Ag	10	2	0.2
B	-	-	0.2
Cd	-	-	1.
Cr	-	-	2.
Cu	1	<1	0.1
Fe	<1	<1	0.5
In	1	-	1.
Pb	-	-	2.
Mn	-	-	0.5
Ni	-	-	1.
Sn	-	-	1.
Si	<1	<1	0.5
Ti	1	-	1.
V	-	-	5
Zn	-	-
Semiquantitative (without standards) estimates of concentration ranges
	%	%
Al	-	0.0001 −0.001
Ca	0.0001–0.001	<0.0001
Pt	< 0.0001	<0.0001
Rh	-	-

Notes: dash (–), not detected; <, less than.