Analysis of trace metal distribution in plants with lab-based microscopic X-ray fluorescence imaging

Table 7 Calibration for the foil standards: content in standard sample measured with ICP-MS and its calibrated value from µXRF

Standard samples	K [mg kg⁻¹]	Ca [mg kg⁻¹]	Mn [mg kg⁻¹]	Fe [mg kg⁻¹]	Ni [mg kg⁻¹]	Cu [mg kg⁻¹]	Zn [mg kg⁻¹]
Std 1
ICP-MS	1091	1378	167	241	1158	244	52,207
µXRF	1119	1444	181	262	1158	277	52,978
Std 2
ICP-MS	615	772	92	131	630	137	27,528
µXRF	513	628	89	120	647	125	25,418
Std 3
ICP-MS	430	544	63	91	434	94	14,482
µXRF	441	530	52	78	402	73	15,120
Std 4
ICP-MS	51	68	5	9	34	8	1108
µXRF	72	129	0	12	49	0	1858
Std 5
ICP-MS	36	74	3	4	16	4	529
µXRF	78	105	0	0	16	0	480
Std 1
RSE %	1.27	2.34	4.02	4.17	0.00	6.33	0.73
Std 2
RSE %	9.04	10.29	1.66	4.38	1.33	4.58	3.99
Std 3
RSE %	1.26	1.30	9.57	7.69	3.83	12.57	2.16
Std 4
RSE %	17.07	30.96	100.00	14.29	18.07	100.00	25.29
Std 5
RSE %	36.84	17.32	100.00	100.00	0.00	100.00	4.86

The relative standard error percentage (SE/mean %, with n = 2 and SE = STDEV/sqrt(n)) shows the difference between the µXRF result and the ICP-MS

ISSN: 1746-4811