SUMMARY
This application note summarizes the digestion of base metals by aqua regia in various certified reference materials using ColdBlock Digestion Technology.
| Instrument: | ColdBlock CB15, chiller, ICP-OES, ICP-MS |
| Published: | May 2024 |
| Digestion Time: | 15 Minutes |
| Acid Used: | Aqua Regia |
| Average ColdBlock Recovery vs. CRM: |
|
|
Table 1 – Summary of sample types |
|||
|
CRM ID |
TYPE |
Sample Weight |
Method |
|
AMIS 0619 |
Copper Concentrate, Black Mountain, Northern Cape, South Africa |
0.5 |
rAR |
|
AMIS 0566 |
Copper Concentrate, Philippines |
0.5 |
rAR |
|
GBM318-6 |
Geochem Base Metal |
0.5 |
AR |
|
OREAS 504b |
Porphyry Copper-Gold-Molybdenum |
0.5 |
AR |
|
OREAS 990 |
Copper-Gold Concentrate |
0.5 |
rAR |
|
OREAS 134b |
Zn-Pb-Ag Ore |
0.5 |
rAR |
|
AMIS 0619 – Copper Concentrate, Black Mountain, Northern Cape, South Africa |
||||||||||
|
Method: |
0.5g |
Slowly add 12mL HNO3 and 4mL HCl, digest at 60% power for 15 minutes. Cool, and bulk to 50mL with 15%HCl v/v |
||||||||
|
Element |
Certified Value |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
|||||||||
|
Co (ppm) |
476 |
438 |
514 |
411 |
408 |
476 |
432 |
31.4 |
7.3% |
91% |
|
Cu (%) |
25.14 |
23.14 |
27.14 |
25.5 |
24.9 |
25.1 |
25 |
0.2 |
1.0% |
100% |
|
Fe (%) |
34.22 |
31.22 |
37.22 |
33.7 |
33.7 |
34.0 |
34 |
0.1 |
0.4% |
99% |
|
Mo (ppm) |
1098 |
975 |
1221 |
1040 |
1030 |
1050.0 |
1040 |
8.2 |
0.8% |
95% |
|
Ni (ppm) |
330 |
294 |
366 |
313 |
306 |
308 |
309 |
2.9 |
1.0% |
94% |
|
Pb (%) |
2.72 |
2.52 |
2.92 |
2.59 |
2.60 |
2.61 |
2.60 |
0.01 |
0.3% |
96% |
|
Zn (%) |
1.24 |
1.17 |
1.31 |
1.22 |
1.25 |
1.22 |
1.23 |
0.01 |
1.1% |
99% |
|
GBM318-6 – Geochem Base Metal |
||||||||||
|
Method: |
0.5g |
Slowly add 4mL HNO3 and 12mL HCl, digest at 60% power for 15 minutes. Cool, and bulk to 50mL with 15%HCl v/v |
||||||||
|
Element |
Certified Value |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
|||||||||
|
Co (ppm) |
49 |
47.5 |
50.5 |
46 |
47 |
48 |
47 |
0.8 |
1.7% |
96% |
|
Cu (ppm) |
2423 |
2399.4 |
2446.6 |
2520 |
2610 |
2520 |
2550 |
42 |
1.7% |
105% |
|
Ni (ppm) |
762 |
749 |
775 |
860 |
862 |
869 |
864 |
3.9 |
0.4% |
113% |
|
Pb (ppm) |
10 |
9.3 |
10.7 |
14 |
9 |
10 |
11 |
2.3 |
20.3% |
112% |
|
Zn (ppm) |
130 |
122.3 |
137.7 |
134 |
130 |
131 |
132 |
1.7 |
1.3% |
101% |
|
OREAS 504b – Porphyry Copper-Gold-Molybdenum |
||||||||||
|
Method: |
0.5g |
Slowly add 4mL HNO3 and 12mL HCl, digest at 60% power for 15 minutes. Cool, and bulk to 50mL with 15% HCl v/v |
||||||||
|
Element |
Certified Value |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
|||||||||
|
Co (ppm) |
18.7 |
18.1 |
19.4 |
19 |
19 |
19 |
18.9 |
0.05 |
0.2% |
101% |
|
Cu (%) |
1.1 |
1.09 |
1.11 |
1.06 |
1.05 |
1.06 |
1.1 |
0.005 |
0.4% |
96% |
|
Fe (%) |
6.71 |
6.51 |
6.91 |
6.57 |
6.63 |
6.58 |
6.59 |
0.03 |
0.4% |
98% |
|
Ni (ppm) |
30 |
29.1 |
31 |
29 |
30 |
30 |
30 |
0.2 |
0.6% |
99% |
|
Mo (ppm) |
476 |
467 |
485 |
459 |
457 |
459 |
458 |
0.9 |
0.2% |
96% |
|
Pb (ppm) |
26.2 |
25.1 |
27.3 |
25.2 |
28.2 |
24.8 |
26.1 |
1.5 |
5.8% |
99% |
|
Zn (ppm) |
96 |
94 |
99 |
86 |
90 |
82 |
86 |
3.3 |
3.8% |
90% |
|
OREAS 990 – Copper-Gold Concentrate |
||||||||||
|
Method: |
0.5g |
Slowly add 12mL HNO3 and 4mL HCl, digest at 60% power for 15 minutes. Cool, and bulk to 50mL with 15% HCl v/v |
||||||||
|
Element |
Certified Value |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
|||||||||
|
Cu (%) |
16.99 |
16.72 |
17.25 |
16.6 |
16.6 |
15.5 |
16.21 |
0.5 |
3.2% |
95% |
|
Fe (%) |
20.07 |
19.38 |
20.77 |
19.0 |
18.7 |
18.9 |
18.87 |
0.1 |
0.7% |
94% |
|
Ni (ppm) |
93 |
87 |
100 |
96 |
94 |
96 |
95 |
0.9 |
1.0% |
103% |
|
Mo (ppm) |
116 |
108 |
125 |
116 |
116 |
120 |
117 |
1.9 |
1.6% |
101% |
|
Pb (%) |
8.62 |
8.51 |
8.73 |
8.28 |
8.07 |
8.61 |
8.32 |
0.2 |
2.7% |
97% |
|
Zn (%) |
13.43 |
13.1 |
13.75 |
13.69 |
13.48 |
13.49 |
13.55 |
0.1 |
0.7% |
101% |
|
OREAS 134b – Zn-Pb-Ag Ore |
||||||||||
|
Method: |
0.5g |
Slowly add 12mL HNO3 and 4mL HCl, digest at 60% power for 15 minutes. Cool, and bulk to 50mL with 15% HCl v/v |
||||||||
|
Element |
Certified Value |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
|||||||||
|
Co (ppm) |
104 |
92 |
116 |
95 |
96 |
94 |
95 |
0.8 |
0.9% |
91% |
|
Cu (ppm) |
1337 |
1284 |
1391 |
1290 |
1300 |
1300 |
1297 |
4.7 |
0.4% |
97% |
|
Fe (%) |
12.25 |
11.71 |
12.8 |
11.7 |
11.6 |
11.8 |
11.7 |
0.08 |
0.7% |
96% |
|
Pb (%) |
13.31 |
12.85 |
13.78 |
13.1 |
12.9 |
13.1 |
13.03 |
0.1 |
0.7% |
98% |
|
Zn (%) |
17.7 |
17.04 |
18.36 |
17.7 |
17.9 |
18.1 |
17.9 |
0.2 |
0.9% |
101% |
Click here to download the Application Note in PDF format.
Join our monthly e-newsletter for expert tips, updates, and exclusive content delivered straight to your inbox.
ColdBlock Technologies Inc.
4551 Zimmerman Ave
Niagara Falls, ON L2E 3M5
info@coldblock.ca.
Learn how ColdBlock can
revolutionize your lab.