Table 4.

Composition of lead calibration samples

Sample	Isotope	Wt soln	Conc. soln Pb/g soln	Pb
		g	m mol	m mol
3	206	2.02622	0.1415629	0.2868376
	208	2.08562	.1407847	.2936234
4	206	1.94738	0.1415629	0.2756768
	208	1.97846	.1407847	.2785369
5	206	0.97453	0.1415629	0.1379573
	208	2.10062	.1407847	.2957352
6	206	0.93376	0.1415629	0.1321858
	208	2.04303	.1407847	.2876274
7	206	4.12812	0.1415629	0.5843886
	208	0.05691	.1407847	.0080121
8	206	4.19283	0.1415629	0.5935492
	208	0.06345	.1407847	.0089328