Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals

Table 3

Application of the XRF calibrations for the determination of major elements (mean concentration in % m/m; mass/mass unit expressed in percentage, habitually called wt.% and 99% uncertainty or simply ) in four rock samples (data reported as rounded value following flexible criteria proposed by [18]) and their comparison with the literature data.

Rock	Method (ref.)	SiO2		TiO2		Al2O3		Fe2O3^t		MnO		MgO		CaO		Na2O		K2O		P2O5
		ATT1	OLR	61.7	6.1	0.4961	0.0173	10.00	0.49	4.246	0.292	0.02394	0.00188	5.373	0.377	2.139	0.086	0.083	0.094	0.7777	0.0378	0.8074	0.0134
UWLR	62.30		2.23	0.4951	0.0143	9.666	0.321	4.402	0.235	0.02416	0.00269	6.17	0.52	2.144	0.076	0.058	0.065	0.7781	0.0366	0.7828	0.0125
[76]	59.6		0.8	0.49	0.015	9.50	0.29	3.31	0.06	0.025	0.018	9.14	0.06	1.87	0.03	0.1	0.03	0.86	0.06	0.76	0.01
CSB1	OLR	52.7	5.5	0.1448	0.0157	24.60	0.71	3.493	0.289	0.01408	0.00188	1.523	0.270	1.117	0.085	2.126	0.119	0.4169	0.0374	0.0383	0.0060
	UWLR	52.76	2.04	0.1343	0.0130	24.40	0.48	3.564	0.233	0.01398	0.00268	1.604	0.398	1.105	0.075	2.123	0.083	0.4337	0.0361	0.0357	0.0057
	[76]	55.3	0.8	0.16	0.03	21.75	0.18	3.88	0.03	0.020	0.003	1.94	0.08	1.28	0.06	2.07	0.20	0.54	0.03	—	—
GH	OLR	73.3	6.5	0.0968	0.0157	13.98	0.53	1.336	0.285	0.05084	0.00190	0.074	0.262	0.843	0.084	3.618	0.151	5.302	0.059	0.0119	0.0059
	UWLR	73.62	2.38	0.0861	0.0129	13.714	0.349	1.466	0.229	0.05064	0.00271	0.038	0.390	0.828	0.074	3.625	0.105	5.216	0.057	0.0091	0.0057
	[77]	75.8	0.39	0.08	0.07	12.50	0.16	1.34	0.2	0.05	0.009	0.03	0.18	0.69	0.13	3.85	0.11	4.76	0.05	0.08	0.03
TLM1	OLR	57.7	5.7	0.8497	0.0200	17.38	0.58	7.637	0.306	0.11614	0.00199	3.972	0.319	6.807	0.100	2.675	0.130	1.7585	0.0403	0.1378	0.0063
	UWLR	57.67	2.11	0.8402	0.0165	17.046	0.386	7.682	0.247	0.11592	0.00281	4.281	0.447	6.821	0.088	2.667	0.090	1.742	0.0390	0.1336	0.0060
	[78]	58.85	0.35	0.820	0.013	17.48	0.25	7.67	0.15	0.105	0.013	3.3	0.08	6.67	0.08	2.98	0.07	1.67	0.08	0.15	0.013