APPLICATION NOTE
Skimmed Milk Powder – ERM-BD150
SUMMARY
The application note summarizes the digestion of ERM-BD150, a skimmed milk powder Certified Reference Material using ColdBlock™ Digestion Pro Series Technology.
| Instrument: | ColdBlock CBM sample digester, chiller, Quartz Vessels , ICP-MS |
| Published: | March 2023 |
| Digestion Time: | 20 Minutes |
| Acid Used: | HNO3 & H2O2 |
| Average ColdBlock Recovery vs. CRM: |
|
METHODOLOGY
- Chiller temperature was set to -5°C
- 5g of each sample was weighed and placed into a quartz ColdBlock™ Digestion vessel
- 15mL of Nitric acid was added
- Sample was digested at 70% power for 15 minutes
- 2mL of 30% v/vHydrogen Peroxide was added
- Samples were digested again at 70% power for 5 minutes
- Samples were cooled and bulked to 40mL using 2% HNO3 + 5% HCl v/v
DISCUSSION
- The samples were clear at the end of the digestion
- Samples were analyzed by ICP-MS
Figure 1 ERM-BD150 after bulk up
ERM-BD150; Skimmed Milk Powder; European Commission, Joint Research Centre, Directorate F – Health, Consumers and Reference Materials Retieseweg 111 B-2440 Geel, Belgium
Results
|
ERM BD-150 – Skimmed Milk Powder |
|||||||||||
|
Method: |
0.25g |
15mL HNO3 -Digest at 70% power for 15 minutes, add 2mL H2O2 and digest again at 70% power for 5 minutes |
|||||||||
|
Element |
Certified Value (ppm) |
+/– |
95% Confidence Limits |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
% RSD |
% Recovery |
|
|
Low |
High |
||||||||||
|
Ca |
13900 |
800 |
13100 |
14700 |
13522 |
13349 |
13656 |
13509 |
126 |
0.9% |
97% |
|
K |
17000 |
700 |
16300 |
17700 |
17285 |
17372 |
17703 |
17453 |
180 |
1.0% |
103% |
|
Mg |
1260 |
100 |
1160 |
1360 |
1231 |
1230 |
1244 |
1235 |
7 |
0.5% |
98% |
|
Na |
4180 |
190 |
3990 |
4370 |
4104 |
4092 |
4164 |
4120 |
31 |
0.8% |
99% |
|
P |
11000 |
600 |
10400 |
11600 |
11433 |
11593 |
11007 |
11344 |
247 |
2.2% |
103% |
|
Cd |
0.0114 |
0.0029 |
0.0085 |
0.0143 |
0.0116 |
0.0118 |
0.0116 |
0.0117 |
0.0001 |
0.8% |
102% |
|
Cu |
1.08 |
0.06 |
1.02 |
1.14 |
1.11 |
1.07 |
1.05 |
1.07 |
0.02 |
1.9% |
99% |
|
Fe |
4.6 |
0.5 |
4.1 |
5.1 |
4.6 |
4.4 |
4.6 |
4.5 |
0.1 |
2.1% |
98% |
|
Hg |
0.06 |
0.007 |
0.053 |
0.067 |
0.07 |
0.06 |
0.06 |
0.063 |
0.003 |
4.6% |
104% |
|
Mn |
0.289 |
0.018 |
0.271 |
0.307 |
0.265 |
0.334 |
0.284 |
0.294 |
0.03 |
9.9% |
102% |
|
Pb |
0.019 |
0.004 |
0.015 |
0.023 |
0.027 |
0.024 |
0.021 |
0.024 |
0.002 |
10.2% |
126% |
|
Se |
0.188 |
0.014 |
0.174 |
0.202 |
0.207 |
0.172 |
0.173 |
0.184 |
0.016 |
8.8% |
98% |
|
Zn |
44.8 |
2 |
42.8 |
46.8 |
46.4 |
44.7 |
46.8 |
46.0 |
0.9 |
2.0% |
103% |
Click here to download the Application Note in PDF format.
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4551 Zimmerman Ave
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info@coldblock.ca.