Bismuth-Remaining Cupellation Fire Assay Preconcentration Combined with Inductively Coupled Plasma Mass Spectrometry for the Simultaneous Determination of Ultratrace Au, Pt, Pd, Ru, Rh, and Ir in Geologic Samples

Table 5

Comparison of analytical data and recommended values for Au, Pt, Pd, Ru, Rh, and Ir in certified reference materials samples by the proposed Pb-FA LA-ICP-MS method (n = 5, ng g⁻¹).

Element		Au	Pt	Pd	Ru	Rh	Ir
GBW07288	Found	1.1 ± 0.2	0.23 ± 0.03	0.30 ± 0.04	0.062 ± 0.014	0.022 ± 0.005	0.038 ± 0.008
Soil	Certified	0.9 ± 0.2	0.26 ± 0.05	0.26 ± 0.05	(0.05)	0.017 ± 0.006	0.032 ± 0.012
t-test		2.24	2.24	2.24	1.92	2.24	1.68
GBW07289	Found	12 ± 2	1.4 ± 0.2	2.5 ± 0.3	0.12 ± 0.02	0.099 ± 0.021	0.07 ± 0.02
Stream sediment	Certified	10 ± 2	1.6 ± 0.3	2.3 ± 0.2	(0.10)	0.095 ± 0.012	0.05 ± 0.01
t-test		2.24	2.24	1.49	2.24	0.43	2.24
GBW07290	Found	1.3 ± 0.2	5.6 ± 0.4	5.1 ± 0.4	16.2 ± 2.8	1.1 ± 0.2	4.7 ± 0.3
Olivine	Certified	1.1 ± 0.1	6.4 ± 0.9	4.6 ± 0.6	14.8 ± 2.7	1.3 ± 0.3	4.3 ± 0.5
t-test		2.24	4.47	2.80	1.12	2.24	2.98
GBW07291	Found	4.7 ± 0.4	61 ± 5	67 ± 5	2.7 ± 0.3	4.9 ± 0.4	5.5 ± 0.4
Pyroxene peridotite	Certified	4.3 ± 0.3	58 ± 5	60 ± 9	2.5 ± 0.2	4.3 ± 0.8	4.7 ± 1.1
t-test		2.24	1.34	3.13	1.49	3.35	4.47
GBW07292	Found	—	23 ± 4	10.1 ± 0.7	501 ± 54	12 ± 2	144 ± 11
Chromite	Certified	—	20 ± 4	11.3 ± 1.5	527 ± 91	10 ± 2	136 ± 10
t-test			1.68	3.83	1.08	2.24	1.63
GBW07293	Found	49 ± 4	432 ± 24	597 ± 42	15 ± 2	24 ± 2	33 ± 5
Palladium poor ore	Certified	(45)	440 ± 37	568 ± 51	13 ± 1	22 ± 3	28 ± 7
t-test		2.24	0.75	1.54	2.24	2.24	2.24
GBW07294	Found	2.1 ± 0.4	13.1 ± 2.6	17.1 ± 2.4	0.63 ± 0.15	0.92 ± 0.18	1.5 ± 0.2
Soil	Certified	(1.8)	14.7 ± 2.5	15.2 ± 2.3	0.66 ± 0.20	1.1 ± 0.2	1.2 ± 0.3
t-test		1.68	1.38	1.77	0.30	2.24	3.35
GBW07340	Found	2.6 ± 0.3	0.61 ± 0.06	0.72 ± 0.09	0.47 ± 0.09	0.070 ± 0.007	0.18 ± 0.03
Soil	Certified	(2.3)	0.66 ± 0.08	0.66 ± 0.08	0.43 ± 0.16	0.066 ± 0.008	0.16 ± 0.03
t-test		2.24	1.86	1.49	0.99	1.28	1.49
GBW07341	Found	—	1947 ± 122	591 ± 43	68 ± 6	5.76 ± 0.45	26 ± 4
Palladium ore	Certified	—	1900 ± 200	570 ± 50	74 ± 7	(6)	28 ± 6
t-test			0.86	1.09	2.24	1.19	1.12
GBW07342	Found	—	5988 ± 422	1755 ± 145	1.7 ± 0.2	1.7 ± 0.3	2.6 ± 0.3
Palladium ore	Certified	—	5700 ± 500	1670 ± 130	(2)	1.5 ± 0.5	2.1 ± 0.7
t-test			1.53	1.31	3.35	1.49	3.73
GBW07201	Found	—	11.5 ± 1.8	7.5 ± 0.8	328 ± 12	13.3 ± 2.2	95 ± 8
Chromite	Certified	—	10 ± 1	7 ± 1	305 ± 6	12 ± 1	90 ± 6
t-test			1.86	1.40	4.29	1.32	1.40
GBW07228	Found	3.5 ± 0.3	—	—	—	—	—
Gold geological sample	Certified	3.4 ± 0.2	—	—	—	—	—
t-test		0.75
GBW07229	Found	54 ± 4	—	—	—	—	—
Gold geological sample	Certified	52 ± 3	—	—	—	—	—
t-test		1.12
GBW07230	Found	1362 ± 28	—	—	—	—	—
Gold geological sample	Certified	1330 ± 20	—	—	—	—	—
t-test		2.56

The value in brackets is the reference value. t_0.05,4 = 2.77, t_0.01,4 = 4.60.