SUMMARY
The application note summarizes the digestion of NIST 1575a, a pine needles standard reference material using ColdBlock Digestion Pro Series Technology.
| Instrument: | ColdBlock CBM (with quartz test tubes), chiller, ICP-MS |
| Published: | July 2024 |
| Digestion Time: | 20 Minutes |
| Acid Used: | HNO3 & H2O2 |
| Average ColdBlock Recovery vs. CRM: |
|
NIST 1575a after digestion and bulk up to 40mL
|
NIST 1575a Trace Elements in Pine Needles |
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|
Method: |
0.5g |
10mL HNO3 65% power for 20 minutes, then slowly add 2mL of 30% H2O2 |
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|
Element |
Consensus Value (ppm) |
+/- |
Sample A |
Sample B |
Sample C |
Average (ppm) |
Stdev |
RSD |
Recovery |
|
Al |
580 |
30 |
574 |
586 |
596 |
585 |
8.7 |
1.5% |
101% |
|
Ba |
6.0 |
0.2 |
5.3 |
5.9 |
6.2 |
5.8 |
0.4 |
6.6% |
96% |
|
Ca |
2500 |
100 |
2502 |
2383 |
2574 |
2486 |
78.6 |
3.2% |
99% |
|
Cd |
0.233 |
0.004 |
0.253 |
0.251 |
0.273 |
0.259 |
0.01 |
3.8% |
111% |
|
Cu |
2.8 |
0.2 |
3.2 |
3.1 |
3.0 |
3.1 |
0.1 |
2.6% |
111% |
|
Fe |
46 |
2 |
43 |
46 |
48 |
46 |
2.2 |
4.9% |
99% |
|
K |
4170 |
70 |
4059 |
4062 |
4111 |
4077 |
23.8 |
0.6% |
98% |
|
P |
1070 |
80 |
1185 |
1128 |
1127 |
1147 |
27.1 |
2.4% |
107% |
|
Rb |
16.5 |
0.9 |
15.7 |
15.6 |
15.4 |
15.6 |
0.1 |
0.7% |
94% |
|
Zn |
38 |
2 |
37 |
37 |
39 |
37 |
0.9 |
2.4% |
98% |
|
Hg |
0.0399 |
0.0007 |
0.0421 |
0.0427 |
0.042 |
0.0424 |
0.0002 |
0.6% |
106% |
Click here to download the Application Note in PDF format.
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4551 Zimmerman Ave
Niagara Falls, ON L2E 3M5
info@coldblock.ca.
