Electronic Supplementary Material
Accred. Qual. Assur., 2017, Springer Verlag Berlin Heidelberg
Laboratory Capacity Building through the Use of Metrologically Traceable Reference Values in Proficiency Testing Programmes
Robert Kaarls, Lindsey Mackay, Angela Samuel, Della Wai-mei Sin, Chuen-shing Mok, Yee-lok Wong, Yiu-chung Yip
E-mail:
Table S1ANOVA table for between-bottle homogeneity study of Iron
Source of variation / SS / df / MS / F / p-value / FcritBetween Bottles / 171.7789 / 9 / 19.0865 / 1.2518 / 0.3637 / 3.0204
Within Bottles / 152.4726 / 10 / 15.2473
Total / 324.2515 / 19
Note: SS is the sum of squares; df is the degrees of freedom; MS is the mean square.
Table S2ANOVA table for between-bottle homogeneity study of Zinc
Source of variation / SS / df / MS / F / p-value / FcritBetween Bottles / 32.7904 / 9 / 3.6434 / 1.3984 / 0.3034 / 3.0204
Within Bottles / 26.0541 / 10 / 2.6054
Total / 58.8444 / 19
Note: SS is the sum of squares; df is the degrees of freedom; MS is the mean square.
Table S3ANOVA table for between-bottle homogeneity study of Arsenic (total)
Source of variation / SS / df / MS / F / p-value / FcritBetween Bottles / 8.9783 / 9 / 0.9976 / 1.2246 / 0.3762 / 3.0204
Within Bottles / 8.1466 / 10 / 0.8147
Total / 17.1249 / 19
Note: SS is the sum of squares; df is the degrees of freedom; MS is the mean square.
Table S4ANOVA table for between-bottle homogeneity study of Cadmium
Source of variation / SS / df / MS / F / p-value / FcritBetween Bottles / 0.00067 / 9 / 0.000075 / 2.0799 / 0.1347 / 3.0204
Within Bottles / 0.00036 / 10 / 0.000036
Total / 0.00103 / 19
Note: SS is the sum of squares; df is the degrees of freedom; MS is the mean square.
Table S5Summary of F values and relative standard uncertainty due to between-bottle in(homogeneity)
Analyte / ANOVA test / Relative standard uncertainty due to between-bottle in(homogeneity), ubb (%)F / Fcrit
Fe / 1.2518 / 3.0204 / 1.05
Zn / 1.3984 / 3.0204 / 1.26
As / 1.2246 / 3.0204 / 0.95
Cd / 2.0799 / 3.0204 / 1.21
Table S6 Results of the stability tests at 20 ºC, 40 ºC and 50 ºC for Iron
IronStatistical parameter / 20 ºC / 40 ºC / 50 ºC
Slope of the regression line (b1) / -0.0107 / -0.3878 / -0.4327
Uncertainty associated with the slope [s(b1)] / 0.0024 / 0.3452 / 0.6426
Student’s t-factor
(t0.95, n-2) / 12.71 / 4.30 / 4.30
t0.95, n-2 × s(b1) / 0.0310 / 1.4844 / 2.7633
b1t0.95, n-2 × s(b1) / Yes / Yes / Yes
Statistical significance
(95% confidence interval) / No / No / No
Conclusion / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed.
Table S7 Results of the stability tests at 20 ºC, 40 ºC and 50 ºC for Zinc
ZincStatistical parameter / 20 ºC / 40 ºC / 50 ºC
Slope of the regression line (b1) / 0.0085 / 0.2035 / 0.1061
Uncertainty associated with the slope [s(b1)] / 0.0149 / 0.3014 / 0.0511
Student’s t-factor
(t0.95, n-2) / 12.71 / 4.30 / 4.30
t0.95, n-2 × s(b1) / 0.1889 / 1.2962 / 0.2196
b1t0.95, n-2 × s(b1) / Yes / Yes / Yes
Statistical significance
(95% confidence interval) / No / No / No
Conclusion / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed.
Table S8 Results of the stability tests at 20 ºC, 40 ºC and 50 ºC for Arsenic (total)
Arsenic (total)Statistical parameter / 20 ºC / 40 ºC / 50 ºC
Slope of the regression line (b1) / -0.0163 / 0.1281 / -0.0111
Uncertainty associated with the slope [s(b1)] / 0.0073 / 0.1973 / 0.1134
Student’s t-factor
(t0.95, n-2) / 12.71 / 4.30 / 4.30
t0.95, n-2 × s(b1) / 0.0926 / 0.8482 / 0.4874
b1t0.95, n-2 × s(b1) / Yes / Yes / Yes
Statistical significance
(95% confidence interval) / No / No / No
Conclusion / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed.
Table S9 Results of the stability tests at 20 ºC, 40 ºC and 50 ºC for Cadmium
CadmiumStatistical parameter / 20 ºC / 40 ºC / 50 ºC
Slope of the regression line (b1) / 0.00007 / 0.0008 / -0.0006
Uncertainty associated with the slope [s(b1)] / 0.00002 / 0.0015 / 0.0011
Student’s t-factor
(t0.95, n-2) / 12.71 / 4.30 / 4.30
t0.95, n-2 × s(b1) / 0.00026 / 0.0064 / 0.0047
b1t0.95, n-2 × s(b1) / Yes / Yes / Yes
Statistical significance
(95% confidence interval) / No / No / No
Conclusion / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed. / The slope was insignificant.
No instability was observed.
Table S10Summary of p-values for Iron, Zinc, Arsenic (total) and Cadmium
Analyte / p-value for significance test for 120 ºC / 40 ºC / 50 ºC
Fe / 0.1422 / 0.3781 / 0.5701
Zn / 0.6685 / 0.5691 / 0.1733
As / 0.2674 / 0.5826 / 0.9310
Cd / 0.1729 / 0.6490 / 0.6399
Table S11Technical Information - Methods of Analysis of Iron for APMP PT 11-01
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)1 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Merck CertiPUR Reference Material
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Microwave-assisted digestion / HNO3 / Yes / External calibration / ISTD & ESTD
5 / Dry ashing / HNO3/ HCl / No / External calibration / Merck
6 / Microwave-assisted digestion / HNO3 / No / External calibration / Fe in Fe(NO3)2 0.5M(Merck)
7 / Microwave-assisted digestion / HNO3 / No / Internal calibration / Wako
8 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Standard solution Merck® 1000 mg/L
9 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / NIST - SRM3126a
10 / Wet digestion / HNO3/ HClO4 / No / External calibration / Traceable to NIST Standard
11 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Fluka & Spectrasol
12 / Dry ashing / HNO3 / --- / External calibration / Baker Instra-Analyzed reagent 1000 mg/L
13 / Dry ashing / --- / No / External calibration / Fluka,
1000ppm stock solution, Fe in 2% nitric acid
14 / Dry ashing / HCl / No / External calibration / Fluka Iron standard for AAS (1000 mg/L)
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S11Technical Information - Methods of Analysis of Iron for APMP PT 11-01 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information1 / No / Flame AAS / Yes: 89.8% / No / ---
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Yes: Sc / ICP-MS / Yes: 99.27% / Yes / ---
5 / No / Flame AAS / No / No / ---
6 / No / Flame AAS / No / No / ---
7 / Yes: DORM-3 / Flame AAS / No / No / Analytical Method: AOAC Official Method 999.10:2002
8 / No / ICP-AES / Yes: 95% / No / ---
9 / No / Flame AAS / Yes: 103.4% / No / Is attached
10 / No / Flame AAS / No / No / ---
11 / No / Flame AAS / No / No / ---
12 / No / Flame AAS / No / Yes / ---
13 / No / Flame AAS / No / Yes / ---
14 / No / Flame AAS / No / No / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S12Technical Information - Methods of Analysis of Zincfor APMP PT 11-01
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)1 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Merck CertiPUR Reference Material
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Microwave-assisted digestion / HNO3 / Yes / External calibration / ISTD & ESTD
5 / Dry ashing / HNO3/ HCl / No / External calibration / Merck
6 / Microwave-assisted digestion / HNO3 / No / External calibration / Zn in Zn(NO3)2 0.5M(Merck)
7 / Microwave-assisted digestion / HNO3 / No / Internal calibration / Wako
8 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Standard solution Merck® 1000 mg/L
9 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / NIST - SRM3168a
10 / Wet digestion / HNO3/ HClO4 / No / External calibration / Traceable to NIST Standard
11 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Fluka & Spectrasol
12 / Dry ashing / HNO3 / --- / External calibration / Fluka TraceCERT
1000 mg/L
13 / Dry ashing / --- / No / External calibration / Fluka,
1000ppm stock solution, Zn in 2% nitric acid
14 / Dry ashing / HCl / No / External calibration / Fluka Zinc standard for AAS (1000 mg/L)
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S12Technical Information - Methods of Analysis of Zincfor APMP PT 11-01 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information1 / No / Flame AAS / Yes: 92.2% / No / ---
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Yes: Sc / ICP-MS / Yes: 97.3% / --- / ---
5 / No / Flame AAS / No / No / ---
6 / No / Flame AAS / No / Yes / ---
7 / Yes: DORM-3 / Graphite AAS / No / No / Analytical Method: AOAC Official Method 999.10:2002
8 / No / ICP-AES / Yes: 95% / No / ---
9 / No / Flame AAS / Yes: 100.7% / No / Is attached
10 / No / Flame AAS / No / No / ---
11 / No / Flame AAS / No / No / ---
12 / No / Flame AAS / No / Yes / ---
13 / No / Flame AAS / No / No / ---
14 / No / Flame AAS / No / No / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S13Technical Information - Methods of Analysis of Arsenic (total)for APMP PT 11-01
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)1 / --- / --- / --- / --- / ---
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Microwave-assisted digestion / HNO3 / Yes / External calibration / ISTD & ESTD
5 / Dry ashing / HNO3/ HCl / No / External calibration / Fluka
6 / Microwave-assisted digestion / HNO3 / No / External calibration / As in H3AsO4 0.5M(Merck)
7 / --- / --- / --- / --- / ---
8 / --- / --- / --- / --- / ---
9 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / NIST - SRM83d
10 / Wet digestion / HNO3/ HClO4 / No / External calibration / Traceable to NIST Standard
11 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Fluka & Spectrasol
12 / --- / --- / --- / --- / ---
13 / Microwave-assisted digestion / HNO3/ H2O2 / --- / External calibration / ---
14 / --- / --- / --- / --- / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S13Technical Information - Methods of Analysis of Arsenic (total) for APMP PT 11-01 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information1 / --- / --- / --- / --- / ---
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Yes: Rh / ICP-MS / Yes: 97.8% / Yes / ---
5 / No / Graphite AAS / No / No / ---
6 / No / ICP-MS / No / Yes / ---
7 / --- / --- / --- / --- / ---
8 / --- / --- / --- / --- / ---
9 / No / Hydride generation AAS / Yes: 94.3% / No / Is attached
10 / No / Hydride generation AAS / No / No / ---
11 / No / Hydride generation AAS / No / Yes / ---
12 / --- / --- / --- / --- / ---
13 / No / Graphite AAS / No / No / ---
14 / --- / --- / --- / --- / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S14Technical Information - Methods of Analysis of Cadmiumfor APMP PT 11-01
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)1 / --- / --- / --- / --- / ---
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Microwave-assisted digestion / HNO3 / Yes / External calibration / ISTD & ESTD
5 / Dry ashing / HNO3/ HCl / No / External calibration / Merck
6 / Microwave-assisted digestion / HNO3 / No / External calibration / Cd in Cd(NO3)2 0.5M(Merck)
7 / Microwave-assisted digestion / HNO3 / No / Internal calibration / Wako
8 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Standard solution Merck® 1000 mg/L
9 / Microwave-assisted digestion / HNO3/ H2O2 / No / Standard additions / NIST - SRM3108
10 / Wet digestion / HNO3/ HClO4 / --- / External calibration / Traceable to NIST Standard
11 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Fluka & Spectrasol
12 / --- / --- / --- / --- / ---
13 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Fluka,
1000ppm stock solution, Cd in 2% nitric acid
14 / Dry ashing / HCl / No / External calibration / Fluka
Cadmium standard for AAS (1000 mg/L)
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S14Technical Information - Methods of Analysis of Cadmium for APMP PT 11-01 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information1 / --- / --- / --- / --- / ---
2 / *** / *** / *** / *** / ***
3 / *** / *** / *** / *** / ***
4 / Yes: Rh / ICP-MS / Yes: 101% / Yes / ---
5 / No / Flame AAS / No / No / ---
6 / No / ICP-MS / No / Yes / ---
7 / Yes: DORM-3 / Graphite AAS / No / No / Analytical Method: AOAC Official Method 999.10:2002
8 / No / ICP-AES / Yes: 95% / No / ---
9 / No / Graphite AAS / Yes: 99.9% / No / Is attached
10 / No / Flame AAS / No / No / ---
11 / No / Graphite AAS / No / Yes / ---
12 / --- / --- / --- / --- / ---
13 / No / Graphite AAS / No / No / ---
14 / No / Flame AAS / No / No / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)1 / Microwave-assisted digestion / HNO3/ H2O2/ Aqua regia / No / External calibration / Analytica Praha,
CzechRepublic
2 / Microwave-assisted digestion / HNO3/ H2O2/ Aqua regia / No / External calibration / Merck
3 / --- / --- / --- / --- / ---
4 / Wet digestion / HNO3/ H2O2 / No / External calibration / Std Fe: Merck 1000±2mg/L
5 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / NIM
6 / Microwave-assisted digestion / HNO3/ H2O2 / --- / External calibration / Agilent Technologies
7 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / National Institute of Metrology P.R. China
8 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / ---
9 / Wet digestion / HNO3 / No / External calibration / High Purity Standards
10 / Wet digestion / Aqua regia / No / External calibration / ACR standards
11 / Microwave-assisted digestion / HNO3/ HCl/ H2O2 / No / External calibration / CPA Chem
12 / Wet digestion / HNO3/ HCl / No / External calibration / Choice Analytical
13 / Wet digestion / HNO3/ HCl/ H2O2 / No / External calibration / NIST SRM 3126a
14 / Wet digestion
(Method 3050B) / HNO3/ HCl/ H2O2 / No (All samples were filtered) / Internal calibration / Inorganic Ventures
15 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / SCP Science
16 / Wet digestion / Aqua regia / --- / External calibration / Delta Scientific (Supplier)
17 / Microwave-assisted digestion / HNO3 / No / Internal calibration / Spex Certiprep
18 / Acid digestion / HNO3/ HCl/ H2O2 / No / External calibration / Inorganic Ventures
19 / Acid digestion / HNO3/ HCl/ H2O2 / No / External calibration / Inorganic Ventures
20 / Wet digestion / HNO3 / No / Internal calibration / Inorganic Ventures
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)21 / Wet digestion / HNO3/ HCl/ H2O2 / Yes / Internal calibration / Certified mixes from
Inorganic Ventures
22 / Microwave-assisted digestion / HNO3/ H2O2 / No / Internal calibration / SCP Science
23 / Dry ashing / HCl / No / Standard additions / 2ppm; 5ppm; 10ppm;
15ppm, 20ppm
24 / Microwave-assisted digestion / HNO3/ H2O2 / No / Standard additions / Merck
25 / Microwave-assisted digestion / HNO3/ HCl/ H2O2 / No / External calibration / Merck
26 / Dry ashing / HNO3/ HCl / No / External calibration / Merck
27 / Microwave-assisted digestion / HNO3/ HCl / No / Internal calibration / MRC's
28 / Wet digestion / HNO3/ HCl / No / External calibration / Merck; Batch: HC818177;
Exp: 08/31/2011; Concentration: 999±2 mg/L
29 / Wet digestion / HNO3/ HClO4 / --- / --- / ---
30 / Dry ashing / Aqua regia / No / External calibration / Merck standard solution
31 / Wet digestion / HNO3 / Yes / Internal calibration / Four standard solution 1000ppm
32 / Wet digestion / HNO3 / Yes / Standard additions / Inorganic Ventures
CCS 4,5,6
33 / Wet digestion / HNO3/ H2SO4/HClO4 / No / Internal calibration / Iron standard solution (JCSS)
34 / Microwave-assisted digestion / HNO3/ H2O2 / Yes / External calibration / Merck
35 / Microwave-assisted digestion / HNO3 / No / External calibration / Merck ICP Multi Element Standard Solution
36 / Microwave-assisted digestion / HNO3 / --- / External calibration / High Purity
37 / *** / *** / *** / *** / ***
38 / Microwave-assisted digestion in MARS / HNO3/ H2O2 (5ml and 2ml accordingly) / No / External calibration / Calibration solutions were prepared by dilution of VNIIM Standard Material - aqueous solution of Fe ions: SM 07.01.012
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)39 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Merck certified
40 / Dry ashing / HNO3 / No / External calibration / Merck ICP-MS
Mixed metal standard
41 / Wet digestion / HNO3/ HCl / Yes (filtration post digestion) / External calibration / Merck Iron ICP Standard 10000ppm
42 / Wet digestion / HNO3/ HCl / No / Internal calibration / InorganicVentures
43 / Wet digestion / HNO3, Trace HF / No / External calibration / High Purity Standards
44 / --- / --- / --- / --- / ---
45 / Dry ashing / HCl / Yes / Internal calibration / ---
46 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / Fluka & Spectrasol
47 / Microwave-assisted digestion / HNO3/ H2O2 / --- / External calibration / High Purity Standard
48 / Wet digestion / HNO3/ HCl / No / Internal calibration / GB Standard
49 / --- / --- / --- / --- / ---
50 / --- / --- / --- / --- / ---
51 / Microwave-assisted digestion / HNO3/ H2O2 / No / Internal calibration / GBW 08616
52 / --- / --- / --- / --- / ---
53 / Microwave-assisted digestion / HNO3 / No / External calibration / GB Grade
54 / Wet digestion / HNO3 / No / Internal calibration / SRM
55 / *** / *** / *** / *** / ***
56 / Microwave-assisted digestion / HNO3/ HCl/ H2O2 / No / External calibration / Mineral source
57 / *** / *** / *** / *** / ***
58 / Dry ashing / HCl / No / External calibration / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)59 / Dry ashing / HNO3/ HCl / No / External calibration / Standard iron 1000 ppm (g/ml) - Merck
60 / Wet digestion / HNO3/ HF / No / External calibration / NIST
61 / Wet digestion / HNO3/ H2O2 / No / External calibration / Merck
62 / Microwave-assisted digestion / HNO3 / No / External calibration / Perkin Elmer
63 / Dry ashing / HNO3 / --- / Internal calibration / Merck
64 / Dry ashing / HNO3 / No / External calibration / ---
65 / Dry ashing / HNO3 / No / External calibration / Dilute from Merck Standard Solution 1000 µg/L
66 / *** / *** / *** / *** / ***
67 / *** / *** / *** / *** / ***
68 / Wet digestion / HNO3/ H2O2 / No / Internal calibration / Traceable to Standard Reference Materials from NIST
69 / Dry ashing / HNO3 / No / External calibration / AccuStandard (Traceable to National Institute of Standards and Technology Reference Materials)
70 / Dry ashing / HNO3/ HCl / No / External calibration / NIST
71 / Microwave-assisted digestion / HNO3/ H2O2 / No / Standard additions / UWR
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information1 / No / Flame AAS / No / Yes / ---
2 / No / Flame AAS / No / Yes / ---
3 / --- / --- / --- / --- / ---
4 / No / Flame AAS / No / Yes / ---
5 / Yes: Rh / ICP-MS / Yes: 100.5% / Yes / ---
6 / Agilent Technologies / ICP-MS / No / Yes / ---
7 / No / ICP-AES / No / No / ---
8 / Yes: Sc / ICP-MS / No / Yes / ---
9 / Yes / ICP-AES / No / Yes / Results on sample as received, not adjusted for moisture.
10 / Te / ICP-AES / No / Yes / ---
11 / Yes: Lu / ICP-AES / No / Yes / ---
12 / Yes: Lutetium / ICP-AES / No / Yes / ---
13 / Yes: Yttrium / ICP-AES / Yes: 86.94% / Yes: AIHA IHPAT / ---
14 / Yes: Indium, Yttrium / ICP-AES / No / Yes / ---
15 / Yes: Indium, Scandium, Yttrium / ICP-MS / No / Yes / ---
16 / No / ICP-AES / No / Yes / ---
17 / Yes: Sc / ICP-MS / No / Yes / ---
18 / No / ICP-MS / Yes: 99.6% / Yes / ---
19 / Yes: Sc, In, Lu / High Res ICPMS / Yes / Yes / ---
20 / Yes: Inorganic Ventures / ICP-MS / No / Yes / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information21 / Yes: Yttrium / ICP-OES / No / Yes / ---
22 / Yes: In, Lu, Re, Rh, Tb, Te, Y, Ge / ICP-MS / No / Yes / ---
23 / No / Flame AAS / No / Yes / ---
24 / No / ICP-OES / Yes: 102% / Yes / ---
25 / No / ICP-AES / No / No / ---
26 / No / ICP-AES / No / Yes / ---
27 / Yes: MRC / Flame AAS / No / No / ---
28 / No / Flame AAS / Yes: 83.0% / No / ---
29 / --- / Flame AAS / Yes: 99.9% / Yes, AOAC 968.08 (2002) / ---
30 / No / Flame AAS / No / Yes, AOAC 999.11 / ---
31 / No / Flame AAS / No / Yes / ---
32 / No / ICP-AES / No / Yes / ---
33 / Yes: Y (Yttrium) / ICP-AES / No / No / ---
34 / No / ICP-OES / No / Yes / ---
35 / No / ICP-AES / No / No / ---
36 / No / ICP-AES / No / Yes / ---
37 / *** / *** / *** / *** / ***
38 / Yes: solution of In115 / ICP-MS / Yes: Moisture content is 13.61% / --- / Bottle#210, sample mass for analysis about 0.5g
39 / No / ICP-AES / No / No / ---
40 / No / Flame AAS / No / Yes / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information41 / No / ICP-AES / No / Yes / Our staff froze the sample as per routine SOP and assumed that this will not affect the sample results.
42 / Yes: Scandium / ICP-MS / No / Yes / ---
43 / Yes / ICP-AES / No / Yes / ---
44 / --- / --- / --- / --- / ---
45 / Yes / Flame AAS / No / No / ---
46 / No / Flame AAS / No / No / ---
47 / Yes / Flame AAS / --- / No / ---
48 / Yes: Indium / ICP-AES / No / No / ---
49 / --- / --- / --- / --- / ---
50 / --- / --- / --- / --- / ---
51 / Yes: Yttrium / ICP-AES / No / No / ---
52 / --- / --- / --- / --- / ---
53 / No / ICP-AES / No / No / ---
54 / Yes: Sc / ICP-AES / No / No / ---
55 / *** / *** / *** / *** / ***
56 / No / Flame AAS / No / No / ---
57 / *** / *** / *** / *** / ***
58 / No / Flame AAS / Yes: 91% / No / ---
59 / No / Flame AAS /
Graphite AAS / No / No / AOAC 999.11:2005
60 / No / ICP-AES / No / Yes / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S15Technical Information - Methods of Analysis of Ironfor APLAC T082 (Cont’d)
Lab Code / Use of internal standard(s) / Analytical instrument(s) / Correction for recovery / Method accreditation / Additional information61 / No / ICP-AES / No / No / ---
62 / No / ICP-OES / No / No / ---
63 / No / Flame AAS / No / Yes / ---
64 / No / ICP-MS / No / No / ---
65 / No / Flame AAS / Yes: 95.24% / Yes / ---
66 / *** / *** / *** / *** / ***
67 / *** / *** / *** / *** / ***
68 / No / Flame AAS / No / No / ---
69 / No / Flame AAS / No / No / ---
70 / Yes: Cr / ICP-AES / No / Yes / ---
71 / No / Flame AAS / No / Yes / ---
“***” The registered participant did not submit the result. “---” Data or information was not provided.
Table S16Technical Information - Methods of Analysis of Zincfor APLAC T082
Lab Code / Digestion technique / Digestion medium / Matrix separation / Quantification / Source(s) of Calibration standard(s)1 / Microwave-assisted digestion / HNO3/ H2O2/ Aqua regia / No / External calibration / Analytica Praha,
CzechRepublic
2 / Microwave-assisted digestion / HNO3/ H2O2/ Aqua regia / No / External calibration / Merck
3 / Dry Ashing / Aqua regia / No / Internal calibration / 5
4 / --- / --- / --- / --- / ---
5 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / NIM
6 / Microwave-assisted digestion / HNO3/ H2O2 / --- / External calibration / Agilent Technologies
7 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / National Institute of Metrology P.R. China
8 / --- / --- / --- / --- / ---
9 / Wet digestion / HNO3 / No / External calibration / High Purity Standards
10 / Wet digestion / HNO3 / No / External calibration / ACR standards
11 / Microwave-assisted digestion / HNO3/ HCl/ H2O2 / No / External calibration / CPA Chem
12 / Wet digestion / HNO3/ HCl / No / External calibration / Choice Analytical
13 / Wet digestion / HNO3/ HCl/ H2O2 / No / External calibration / NIST SRM 3168a
14 / Wet digestion
(Method 3050B) / HNO3/ HCl/ H2O2 / All samples were filtered / Internal calibration / Inorganic Ventures
15 / Microwave-assisted digestion / HNO3/ H2O2 / No / External calibration / SCP Science
16 / Wet digestion / Aqua regia / --- / External calibration / Delta Scientfic
17 / Microwave-assisted digestion / HNO3 / No / Internal calibration / Spex Certiprep
18 / Acid digestion / HNO3/ HCl/ H2O2 / No / External calibration / Inorganic Ventures
19 / Acid digestion / HNO3/ HCl/ H2O2 / No / External calibration / Inorganic Ventures
20 / Wet digestion / HNO3 / No / Internal calibration / Inorganic Ventures
“***” The registered participant did not submit the result. “---” Data or information was not provided.